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Sonel Mätutrustning MPI-502F

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USER MANUAL
METER FOR ELECTRICAL
INSTALLATION PARAMETERS
MPI- -502F ● MPI 506 ● MPI- 507
SONEL S.A.
Wokulskiego 11
58- 100 Świdnica
Poland
Version 7 7 32.0 12.0 .202
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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CONTENTS
1 General information ......................................................................................... 5
1.1 Safety symbols ......................................................................................................... 5
1.2 Safety ....................................................................................................................... 6
2 Quick start ........................................................................................................ 7
2.1 Switching on and o, display backlight .................................................................... 7
2.2 Selecting general measurement parameters ........................................................... 7
2.3 Remembering the last measurement result ............................................................. 7
3 Measurements ................................................................................................ 10
3.1 AC voltage measurement ....................................................................................... 10
3.2 Voltage and frequency measurement .................................................................... 10
3.3 Checking the correctness of PE (protective earth) connections ............................ 11
3.4 Fault loop parameters ............................................................................................ 12
3.4.1 Selecting the lead length ................................................................................................12
3.4.2 Prospective short-circuit current ....................................................................................13
3.4.3 Fault loop parameters in the L-N and L-L circuits ........................................................... 14
3.4.4 Fault loop parameters in the L-PE circuit ....................................................................... 17
3.4.5 Fault loop impedance in L-PE circuit protected with a residual current device (RCD) ....19
3.5 Resistance- -earth (R to E3P) ........................................................................ 21
3.6 RCD parameters .................................................................................................... 26
3.6.1 RCD tripping current ...................................................................................................... 26
3.6.2 RCD tripping time .......................................................................................................... 29
3.6.3 Automatic measurements of RCD parameters ............................................................... 32
3.6.3.1 FULL mode ......................................................................................................... 32
3.6.3.2 STANDARD mode .............................................................................................. 36
3.7 Insulation resistance ....................................................................... 39
3.7.1 Measurement of individual objects ................................................................................. 39
3.7.2 Additional information .................................................................................................... 42
3.8 -voltage resistance measurement Low ................................................................... 43
3.8.1 Test leads resistance compensation auto-zeroing –....................................................... 43
3.8.2 -current resistance measurement Low ............................................................................ 44
3.8.3 Measurement of resistance of protective conductors and equipotential bonding with
±200 mA current ............................................................................................................ 46
3.9 Phase sequence ............................................................................. 48
4 Memory of measurement results .................................................................. 50
4.1 Entering the measurement results to the memory ................................................. 50
4.2 Changing the cell and bank number ...................................................................... 52
4.3 Browsing the memory ............................................................................................ 52
4.4 Clearing the memory .............................................................................................. 54
4.4.1 Clearing the bank ........................................................................................................... 54
4.4.2 Clearing the whole memory ........................................................................................... 55
4.5 Communication with computer ............................................................................... 56
4.5.1 Package for cooperation with computer ......................................................................... 56
4.5.2 Data transmission with Bluetooth module ...................................................................... 56
5 Troubleshooting ............................................................................................. 57
6 Power supply .................................................................................................. 59
6.1 Monitoring the power supply volt age...................................................................... 59
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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6.2 Replacing the batteries .......................................................................................... 59
6.3 General rules of using the Nickel Metal Hydride (Ni-MH) batteries ........................... 60
7 Cleaning and maintenance ........................................................................... 60
8 Storage ............................................................................................................ 61
9 Dismantling and disposal ............................................................................. 61
10 Technical data ................................................................................................ 62
10.1 Basic information ................................................................................................... 62
10.1.1 Voltage measurement .................................................................................................... 62
10.1.2 Frequency measurement ............................................................................................... 62
10.1.3 Z L-PE, ZL-N, ZL-L fault loop impedance measurement ....................................................... 62
10.1.4 ZL-PE
fault loop impedance measurement (without tripping the RCD) RCD ............................... 63
10.1.5 Measurement of earth resistance 3-pole method –(R
E3P) ............................... 64
10.1.6 Measurement of the RCD parameters ............................................................................64
10.1.7 Measurement of insulation resistance ...................................................66
10.1.8 -voltage continuity and resistance measurement Low ..................................................... 66
10.1.9 Phase sequence ................................................................................... 67
10.2 Other technical specications ................................................................................ 67
10.3 Additional information ............................................................................................ 68
10.3.1 Additional uncertainty according to IEC 61557-3 (Z) ...................................................... 68
10.3.2 Additional uncertainty according to IEC 61557- 4 (R ±200 mA)....................................... 68
10.3.3 Additional uncertainty according to IEC 61557-6 (RCD) ................................................. 68
10.3.4 Influence of serial interference voltage on the resistance measurements for
function RE3P .................................................................................................................. 68
10.3.5 Inuence of the auxiliary electrodes on earth resistance measurements for function
RE3P .............................................................................................................................. 69
10.3.6 Additional uncertainties according to IEC 61557-5 (RE3P) ..................................... 69
11 Manufacturer .................................................................................................. 69
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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The icon with the meter name is placed next to sections of the text that refer to specic fea-
tures of the device. All other parts of the text relate to all types of the instrument.
1 General information
1.1 Safety symbols
The following international symbols are used in the device and/or in this manual:
Warning;
See explanation in
the manual
Ground
AC current/voltage
DC current/voltage
Dual insulation
(Protection class)
Declaration of Conform-
ity with EU directives
(Conformité
Européenne)
Do not dispose of
with other house-
hold waste
Recycling information
Conrmed compliance
with Australian Stand-
ards
Measurement categories according to IEC 61010-2- 030:
CAT II concerns measurements performed in circuits directly connected to low voltage in-–
stallations,
CAT III concerns measurements performed in buildings installations, –
CAT IV concerns measurements performed at the source of low voltage installation. –
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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1.2 Safety
e meter is designed for testing the protection against electric shock in the mains systems. The Th
meter is used to make measurements which results determine the electrical installation safety level.
Consequently, in order to ensure safe operation and correct measurement results, observe the follow-
ing recommendations:
Before you proceed to operate the meter, acquaint yourself thoroughly with the present manual
and observe the safety regulations and recommendations of the manufacturer.
Any application that differs from those specified in the present manual may cause damage of the
instrument and a serious hazard to its user.
The meters must be operated solely by appropriately qualified personnel with relevant certificates
to perform measurements of electric installation. Operation of the instrument by unauthorized per-
sonnel may result in damage to the device and constitute a hazard to the user.
Using this manual does not exclude the need to comply with occupational health and safety regu-
lations and with other relevant fire regulations required during the performance of a particular type
of work. Before starting the work with the device in special environments, e.g. potentially fire-
risk/explosive environment, it is necessary to consult it with the person responsible for health and
safety.
It is unacceptable to operate the following:
a damaged meter which is completely or partially out of order,
leads with damaged insulation,
a meter which ahs been stored to long in unsuitable conditions (for example is wet). When the
meter is transferred from cold environment to warm and humid one, do not make measure-
ments until the meter warms up to the ambient temperature (about 30 minutes).
Remember that the message on the display means that the power supply voltage is too low and
indicates the need to replace/ charge the batteries. The measurements performed with the meter with
insufficient supply voltage have additional measuring errors which are impossible to be evaluated by
the user and cannot be the basis to determine the correct protection of the tested installation.
Do not leave the discharged batteries in the meter as they can leak and damage the instrument.
Before starting the measurement, check if the leads are connected to correct measuring terminals.
Never use the meters with open or only partially closed battery compartment cover and use only
the power supplies specified in this manual.
Repairs may be performed solely by an authorized service outlet.
NOTE!
Only accessories for a given device should be used. Using other accessories may
cause damage to measuring terminals, introduce additional measurement error and
create a risk for the user.
An attempt to install drivers in 64-bit Windows 8 and Windows 10 may result in dis-
playing "Installation failed" messa ge.
o Cause: Windows 8 and Windows 10 by default blocks drivers without a digi-
tal signature.
o Solution: Disable the driver signature enforcement in Windows.
Due to continuous development of the meter’s software, the actual appearance of
the display, in case of some of the functions, may slightly differ from the display
presented in this operating manual.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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2 Quick start
2.1 Switching on and off, display backlight
To the meter, briefly press the button. To , press the same button switch on switch off
longer (the message appears).
To switch on/off the display and keypad during the meter operation, briefly press the backlight
button.
2.2 Selecting general measurement parameters
+
Keeping the button depressed, switch on the meter and wait SET/SEL
for the parameter selection screen to appear.
Use the ◄► buttons to go to next parameter.
Use the buttons to change the parameter value. The value or ▲▼
symbol to be changed is flashing.
Set the parameters according to the algorithm.
Press hold (until a signal sounds . 3 s) to save the and ENTER – ca
changes and go to the measurement function or press to go the ESC
measurement function without saving the changes.
At first start- after replacing batteriesup or , select the type of power supply: re-
chargeable batteries (ACCU) or batteries (BATT). General measurement parameters
can be selected in the same menu.
Before the first measurements, set the mains rated voltage U n (220/380 V, 230/400 V
or 240/415 V) which is applicable in the test location. The voltage is used to calculate
the prospective short-circuit current, if this option was chosen from the main menu.
The symbol means the positive phase or polarization, the symbol – a negative one.
The symbol in the time to auto-off settings, indicates disabling this function.
The RCD Auto mode settings see . – section 3.6.3
PIN settings see schematic. – Meter settings
Software - see schematic and . upgrade Meter settings section 4.5
2.3 Remembering the last measurement result
The result of the last measurement is remembered until the next measurement is activated, the
measurement parameters are changed or the measuring function is changed with the rotary switch.
Use the button to go to the starting screen of a given function and press ESC ENTER to display the
last measurement result.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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Meter settings algorithm –
Mains voltage
Mains frequency
Result of impedance measurement: short-
circuit current / impedance
Voltage for calculating I
k:
rated / measured
RCD-AUTO parameters:
▪ enabled / disabled
▪ standard mode (STRD) / full mode (FULL
Auto-OFF
▪ disabled
▪ time to automatic shutdown
Bluetooth communication: enabled / disa-
bled
U
N
►
◄
fN
►
◄
LOOP
DISP
►
◄
Ik
►
◄
RCD
Auto
►
◄
OFF
►
◄
BT
►
◄
▲
▼
▪ 220 V
▪ 230 V
▪ 240 V
▪ 50 Hz
▪ 60 Hz
▪ Ik
▪ Z
▪ U
▪ UN
▪ - - -
▪ 300 s
▪ 600 s
▪ 900 s
▪ on
▪ off
L- PE
RCD
►
◄
tA
1/2 I
Δn
►
◄
▲
▼
▪ on
▪ off
▪ on
▪ off
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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Change PIN
Power supply selection:
rechargeable batteries / batteries
Beeper: enabled / disabled
Identifying wires in the conductors dur
ing insulation resistance measurement
on / off
Firmware update
Factory reset: yes / no
PIN
conf
►
◄
SUPP
►
◄
BEEP
►
◄
RISO
PAIR
►
◄
UPDT
►
◄
FACT
SETT
►
◄
3 s
▪ ACCU
▪ BATT
▪ on
▪ off
▪ on
▪ off
▲
▼
▪ yes
▪ no
3 s
▲
▼
0
…
9
◄
►
0
…
9
◄
►
0
…
9
◄
►
0
…
9
3 s
tA
1/2 I
Δn
…
tA
5 I
Δn
◄
►
Ia
►
◄
Ia
►
◄
Auto
3 s
▪ on
▪ off
▪ on
▪ off
▪ on
▪ off
▪ on
▪ off
▪ STRD
▪ FULL
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3 Measurements
WARNING
During the measurements (fault loop impedance, RCD) never touch the earthed
and accessible parts in the tested electrical installation.
During the measurement do not switch the rotary switch as this may cause dam-
age of the meter and hazard for the user.
Message indicates, that an incompatibile measurement adapter is connected
to the meter.
3.1 AC voltage measurement
The meter measures and displays the mains alternating voltage in all measurement functions
with the exception of . The voltage is measured for the 45 65 Hz frequency range. The test leads R …
should be connected as for a given measuring function.
3.2 Voltage and frequency measurement
Set the rotary switch to the ition. U,f pos
Read the measurement result: frequency in the
main display field, voltage in the auxiliary field.
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3.3 Checking the correctness of PE (protective earth) connections
Connect the meters as shown in the figure, touch the contact electrode with your finger and wait about
1 second. When the voltage on the conductor is detected, the instrument displays the mes-PE
sage (error in the installation, the PE conductor is connected to the phase conductor) and generates a
continuous audio signal. This option is available for all measurement functions related to the RCD’s
and fault loop, except for Z L-N,L-L.
WARNING
When dangerous voltage on the protective conductor PE is detected, discon-
tinue the measurements immediately and repair the electrical installation.
Make sure that during the measurements you are not standing on an uninsulated
floor as this may cause erroneous results.
The threshold value, which triggers the signal of exceeded allowable voltage on PE
conduit, is approximately 50 V.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3.4.2 Prospective short-circuit current
The meter always measures the impedance, and the displayed short-circuit current is calculat-
ed according to the following formula:
S
n
kZ
U
I
where:
Un rated voltage of the tested mains, –
ZS measured impedance. –
Based on the rated voltage U n selected in the general settings ( ), the meter autsection 2.2 o-
matically detects the measurement with phase- -neutral or phase- -phase voltage and includes this to to
in the calculations.
If the tested mains voltage is out of tolerance range, the meter will not be able to determine the
correct rated voltage for calculation of short-circuit current. In such case, horizontal lines will be dis-
played instead of the short-circuit current. The figure below shows the voltage ranges for which the
short- rcuit current is calculated. ci
230 400 440 U [V]
U voltage ranges for which the
short-circuit current is calculated
L-N
Voltage range for which the impedance is measured
207 253 360
220 380 418198 242 342
373 415 440216 240 264
440 U [V]
U [V]
U =220V
n
U =230V
n
U =240V
n
U voltage ranges for which the
short-circuit current is calculated
L-L
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3.4.3 Fault loop parameters in the L-N and L-L circuits
Switch on the meter.
Set the rotary switch to the ZL-L ZL-N ition. pos
Select the leads length as described in
sec. 3.4.1 according to the needs.
Connect the test leads as shown in the gure:
for measurement in the L-N circuit,
measurement in the L-L circuit
The meter is ready for measurement.
Phase conductor length or the mbol. sy
UL-N or UL-L voltage
Press START to perform the measurement.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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Read the main result: the fault loop impedance ZS
and the mains voltage during the measurement.
Press to display additional results. ►
Short-circuit current IK
Fault loop resistance R
Fault loop reactance XL
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Save the result in the memory (see sections 4.1 4.2 , ) or press ESC to return to the
voltage measurement.
Making a large number of tests over a short time causes the meter to emit a lot of
heat. As a result the casing may become warm. This is normal. The meter has an
overheat protection.
The minimum time between successive measurements is 5 seconds. This value is
controlled by the meter which displays the message when you can make
the next measurement.
Additional information displayed by the meter
Meter ready for measurement
Voltage on the meter terminals is out of range for Land N
which the measurement can be made.
Voltage on the meter terminals is out of range Land PE
for which the measurement can be made.
Measurement error
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur–e-
ment.
Short-circuit loop of the meter is faulty.
N conductor not connected.
Message (displayed after the measurement) indicates sig-
nicant disturbances in the mains during measurement.
The measurement result may include a large, unspecied
error.
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
The L and N conductors are switched (voltage between the
PE and N conductors).
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3.4.4 Fault loop parameters in the L-PE circuit
Switch on the meter.
Set the rotary switch to the ZL-PE position.
Select the leads length as described in
sec. 3.4.1 according to the needs.
Connect the test leads as shown in one of the gures.
Measurement in L-PE circuit
Checking eectiveness of protection against electric shock
of the meter housing in case of:
TN network or TT network
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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The meter is ready for measurement.
Phase conductor length or the symbol.
UL-PE voltage
Press START to perform the measurement.
The remaining measurement issues are analogous to the ones described for the measurements
in the L-N or L-L systems.
A double-lead measurement is possible when selecting the test lead other than with
the socket adapter.
Additional information displayed by the meter
Meter ready for measurement
Voltage on the meter terminals is out of range for Land N
which the measurement can be made.
Voltage on the meter terminals is out of range Land PE
for which the measurement can be made.
Measurement error
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur–e-
ment.
Short-circuit loop of the meter is faulty.
N conductor not connected.
Message (displayed after the measurement) indicates sig-
nicant disturbances in the mains during measurement.
The measurement result may include a large, unspecified
error.
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
The L and N conductors are switched (voltage between the
PE and N conductors).
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3.4.5 Fault loop impedance in L-PE circuit protected with a residual cur-
rent device (RCD)
The meter allows the fault loop impedance measurements without making changes in the mains
with the residual current devices with rated current of minimum 30 mA.
Switch on the meter.
Set the rotary switch to the ZL-PE RCD position.
Select the leads length as described in
sec. 3.4.1 according to the needs.
Connect the test leads as shown in one of the gures.
Measurement in a TN-S system
Measurement in a TT system
Measurement in a TN-C-S system
The remaining measurement issues are analogous to the ones described for the measurements
in the L-N or L-L systems.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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You can discontinue the measurement by pressing the button. ESC
In a mains without interferences, the measurement takes ca. 8 seconds. If interfer-
ences occur, this time may be longer.
In the electrical installations with the 30 mA residual current devices the sum of the
installation leakage currents and the test current may trip the RCD. In such case, try
to reduce the leakage current of the tested installation (i.e. by disconnecting the
loads).
Additional information displayed by the meter
Meter ready for measurement
Voltage on the meter terminals is out of range for Land N
which the measurement can be made.
Voltage on the meter terminals is out of range Land PE
for which the measurement can be made.
Measurement error
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur–e-
ment.
Short-circuit loop of the meter is faulty.
N conductor not connected.
Message (displayed after the measurement) indicates sig-
nicant disturbances in the mains during measurement.
The measurement result may include a large, unspecied
error.
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
The L and N conductors are switched (voltage between the
PE and N conductors).
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3.5 Resistance- -earth to (R
E
3P)
The three-pole measuring method is the basic type of resistance- -earth measurement. to
Disconnect the tested earth electrode from the installation of the facility.
Switch on the meter.
Set the rotary switch to the RE position.
Un
▲
▼
▪ 25 V
▪ 50 V
Set the measuring voltage according to the fol-
lowing algorithm and the rules for setting the
general parameters.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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Connect the test leads as shown in one of the gures.
Drive the electrode into the earth and connect to the socket of the meter. current H H
Drive the electrode into the earth and connect to the socket of the meter. voltage S S
The being tested should be connected to socket of the meter. earth electrode E
It is recommended that the tested as well as electrodes should be earth electrode H and S
located along one line and at relevant distances, in accordance with the rules of earth meas-
urements.
The meter is ready for measurement.
Interference voltage currently on the object
Press START to perform the measurement.
Read the result.
Un interference voltage –
RE
resistance- -earth –to
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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WARNING
Measurement of resistance- -earth may be carried out if voltage of interfer-to
ences does not exceed 24 V. Voltage of interferences is measured up to the
level of 100 V.
Over 50 V it is signalled as hazardous. The meter must not be connected to
voltages exceeding 100 V.
It is recommended that the test as well as electrodes earth electrode H and S
should be located in one line. Due to the different field conditions it is not always
possible. On the website www.sonel.com and in professional literature special cas-
es of probes location have been discussed.
Particular attention should be paid to quality of connection between the object being
tested and the test lead the contact area must be free from paint, rust, etc. –
If resistance of test probes too high is , R E earth electrode measurement will in-
clude an additional uncertainty. Particularly high uncertainty of measurement oc-
curs when the tested resistance is small, and the probes have a weak contact with
earth (such a situation occurs frequently when the earth electrode is well made but
the upper soil layer is dry and slightly conductive). Then, the ratio of resistance of
the probes to resistance of the tested earth electrode is very high and consequently,
uncertainty of measurement that depends on this ratio is also very high. δ
To reduce the uncertainty of the measurement, the contact of the probe with δ,
earth may be improved, for example, by:
o moistening the spot where the probe is driven with water,
o driving the probe in a different location
o applying an 80 cm probe.
Also, test the test leads for:
o whether their insulation is not defective
o whether the lead banana plug probe contact areas are not corroded or loos-– –
ened.
In majority of cases the achieved measurement accuracy is satisfactory. However,
you should always take account of the uncertainty included in the measurement.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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Additional information displayed by the meter
The meter is ready for measurement.
The tested facility is live. The measurement is blocked.
Immediately disconnect the meter from the object
(both test leads).
Interruption in the current probe circuit.
Interruption in the voltage probe circuit.
Interruption in measuring circuit or resistance of test
probes is higher t 2 k . han Ω
RE>19 99 Ω
Measuring range is exceeded.
Signal / noise ratio is too low (interfering signal too large).
Error due to the resistance of electrodes > 30 % (for cal-
culating uncertainty, measured values are taken into ac-
count).
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3.6 parameters RCD
3.6.1 RCD tripping current
Switch on the meter.
Set the rotary switch to the I A position.
Set the parameters according to the following algorithm and the rules for setting the general pa-
rameters.
IΔn
◄►
Current
waveform
◄►
RCD type
◄►
U
L
◄►
Measurement
mode
▲
▼
▪ 10 mA
▪ 15 mA
▪ 30 mA
▪ 100 mA
▪ 300 mA
▪ 500 mA
general pur-
pose
short-time dela
selective
▪ 12.5 V (for
)
▪ 25 V
▪ 50 V
▪ U
B
, IA, R
E
▪ U
B
, RE
▪ tAi
, U
B, I
A, RE
Connect the test leads as shown in the figure.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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The meter is ready for measurement.
UL-PE voltage
Press START to perform the measurement.
Read the main measurement result: I A current.
Press to read additional results. ►
Tripping time t AI
at the I A current
Protective conductor resistance for - RRCD E
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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Touch voltage U B
If only the measurement of U B
, R E is selected, these values are measured with the
0.4 IΔn current without tripping the RCD. If the RCD trips during the measurement,
press to go to the next measurements. ESC
Due to the specific character of the measurement (step increase of the I A current),
the measurement result for the tripping time t Ai
in this mode may include a positive
error or the message may be displayed due to the RCD inertia. If the result is
outside the allowed range for a given RCD, repeat the measurement in the t A mode
(see section 3.6.2).
Save the result in the memory (see ) or press the button to display section 4.1 ESC
the voltage only. The last measurement result is remembered until you press the
START button or change the rotary switch position.
Additional information displayed by the meter
Meter ready for measurement
Voltage on the meter terminals is out of range L and PE
for which the measurement can be made.
The L and N conductors are switched (voltage between the
PE and N conductors).
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
RCD did not trip or tripped too late.
After the U B RE measurement, the t A measurement was
not performed because the R E and voltage values did not
allow generating the required current value.
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur– e-
ment or RCD tripped during the U B or R E measurement.
Safe touch voltage is exceeded.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
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3.6.2 RCD tripping time
Switch on the meter.
Set the rotary switch to the t A position with the
selected I Δn multiplication factor.
Set the parameters according to the following algorithm and the rules for setting the general pa-
rameters.
IΔn
◄►
Current
waveform
◄►
RCD type
◄►
U
L
◄►
Measuremen
mode
◄►
IΔn
x n
(for t
A
, U
B,
RE mode)
▲
▼
▪ 10 mA
▪ 15 mA
▪ 30 mA
▪ 100 mA
▪ 300 mA
▪ 500 mA
general
purpose
short-time
delay
selective
▪ 12.5 V (for
▪ 25 V
▪ 50 V
▪ tA
, U
B, R
E
▪ UB
, RE
▪ 1/2
▪ 1
▪ 2
▪ 5
In IΔn x n, the multipliers 2 and 5 do not apply to I Δn = 300 mA and 500 mA.
Connect the test leads as shown in the figure.
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The meter is ready for measurement.
UL-PE voltage
Press START to perform the measurement.
Read the main measurement result: tripping time t A.
Press to read additional results. ►
Protective conductor resistance for - RCD RE
Touch voltage U B
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If only the measurement of U B
, R E is selected, these values are measured with the
0.4 IΔn current without tripping the RCD. If the RCD trips during the measurement,
press to go to the next measurements. ESC
Due to the specific character of the measurement (step increase of the I A current),
the measurement result for the tripping time t Ai
in this mode may include a positive
error or the message may be displayed due to the RCD inertia. If the result is
outside the allowed range for a given RCD, repeat the measurement in the t A mode
(see section 3.6.2).
Save the result in the memory (see ) or press the button to display section 4.1 ESC
the voltage only. The last measurement result is remembered until you press the
START button or change the rotary switch position.
Additional information displayed by the meter
Meter ready for measurement
Voltage on the meter terminals is out of range Land PE
for which the measurement can be made.
The L and N conductors are switched (voltage between the
PE and N conductors).
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
RCD did not trip or tripped too late.
After the U B RE measurement, the t A measurement was
not performed because the R E and voltage values did not
allow generating the required current value.
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur– e-
ment or RCD tripped during the U B or R E measurement.
Safe touch voltage is exceeded.
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3.6.3 Automatic measurements of RCD parameters
The instrument can perform automatic measurement of the RCD tripping time tA, tripping current IA,
touch voltage UB and earth resistance RE. In this mode, you do not need to activate the measurement
each time, and your role is only to initiate the measurement and reset the RCD after each tripping.
You can choose two main AUTO modes:
FULL mode,
STANDARD mode.
Mode selection is described in . section 2.2
3.6.3.1 FULL mode
Switch on the meter.
Set the rotary switch to the AUTO position.
If the displayed parameters are dierent than shown below, set them according to the following
algorithm and the rules for setting the general parameters.
IΔn
◄►
RCD type
◄►
RCD type
◄►
UL
▲
▼
▪ 10 mA
▪ 15 mA
▪ 30 mA
▪ 100 mA
▪ 300 mA
▪ 500 mA
▪ AC
▪ A
general purpose
selective
short-time delay
▪ 12.5 V (for )
▪ 25 V
▪ 50 V
Connect the test leads as shown in the gure.
The length of the test
leads is taken from the
settings in the fault loop
impedance measure-
ment (sec. 3.4.1).
If the RCD measure-
ment uses test leads
of a dierent length
than in the Z meas-
urement, either re-
place the test leads
with those used for
the Z measurement,
or enter the Z meas-
urement and set the
length used.
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Number of measured parameters depends on settings in the main menu.
UB and R E are measured always.
If during the U B/RE measurement, the RCD has tripped at 0.5 I n , or has not tripped
in the remaining cases, or the preset safe voltage value U L has been exceeded –
the measurement is discontinued.
The measurements which are not possible are automatically skipped, for example
when the selected current I Δn and multiplication factor are beyond the meter’s
measuring capabilities.
Additional information displayed by the meter
Defective RCD.
RCD in good working order.
Switch on the RCD.
Meter ready for measuremen t
Voltage on the meter terminals is out of range L and PE
for which the measurement can be made.
The L and N conductors are switched (voltage between the
PE and N conductors).
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
RCD did not trip or tripped too late.
After the UB R E measurement, the t A measurement was
not performed because the R E and voltage values did not
allow generating the required current value.
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur– e-
ment or RCD tripped during the U B or R E measurement.
Safe touch voltage is exceeded.
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3.6.3.2 STANDARD mode
Switch on the meter.
Set the rotary switch to the AUTO position.
If the displayed parameters are different than shown below, set them according to the following
algorithm and the rules for setting the general parameters.
IΔn
◄►
Current
waveform
◄►
RCD type
◄►
U
L
▲
▼
▪ 10 mA
▪ 15 mA
▪ 30 mA
▪ 100 mA
▪ 300 mA
▪ 500 mA
general pur-
pose
selective
short-time dela
▪ 12.5 V (for
▪ 25 V
▪ 50 V
Connect the test leads as shown in the figure.
The length of the test leads is taken from the settings in the fault loop impedance meas-
urement (sec. 3.4.1).
If the RCD measurement uses test leads of a different length than in the Z meas-
urement, either replace the test leads with those used for the Z measurement, or
enter the Z measurement and set the length used.
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Additional information displayed by the meter
Defective RCD.
RCD in good working order.
Switch on the RCD.
Meter ready for measurement
Voltage on the meter terminals is out of range for L and N
which the measurement can be made.
The L and N conductors are switched (voltage between the
PE and N conductors).
Temperature inside the meter has exceeded the allowed
limit. The measurement is blocked.
RCD did not trip or tripped too late.
After the U B RE measurement, the t A measurement was
not performed because the R E and voltage values did not
allow generating the required current value.
Incorrect or unstable power grid frequency.
Measurement error loss of voltage after the measur– e-
ment or RCD tripped during the U B or R E measurement.
Safe touch voltage is exceeded.
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3.7 Insulation resistance
WARNING
The object tested must not be live.
3.7.1 Measurement of individual objects
Turn on the meter.
Turn the rotary switch to R ISO position.
If the function for identifying wires in the conduc-
tors is turned on (RISO PAIR - ), but the sec. 2.2
WS adapter is not connected, select the required
markings. The active element flashes.
▲▼ marking selection
◄► wire selection
Designations
▪ L1, L2, L3 – phase conductors
▪ n – neutral conductor N
▪ PE – protective conductor PE
▪ Pn – protective-neutral conductor PEN
▪ - - - connected WS adapter (not selectable) E –
Un
◄►
Measurement
time
▲
▼
▪ 100 V
▪ 250 V
▪ 500 V
0’03”
…
3’00”
Set the measurement voltage according to the fol-
lowing algorithm, and according to the rules de-
scribed in general parameters setting.
Connect test leads according to the drawing. The R ISO+ lead can be connected to the blue or
red socket.
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The meter is ready for measurement.
Voltage present on tested object.
5 s
Press and hold the START button for
5 seconds. Apart from starting the measurement,
this will cause 5-second countdown, after which
the measurement will be locked.
Testing will be continued until it reaches the
preset time START or until button is pressed.
+
Quick start, without 5-second delay of the meas-
urement lock, perform by pressing ENTER and
holding the START button pressed. The meas-
urement is stopped after reaching the preset time
or by pressing START.
Read out the result.
Un measuring voltage –
Press to read additional results. ►
I – measuring current
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WARNING
During measurements of insulation resistance, dangerous voltage up to 600 V
occurs at the ends of test leads.
It is forbidden to disconnect test leads and to change the position of the func-
tion switch before completion of measurement. Failure to obey the above in-
struction will lead to high voltage electric shock and make it impossible to
discharge the tested object.
The meter emits a continuous audio signal until test voltage reaches 90% of the
preset value (and also when 110% of the preset value is exceeded).
During measurement, the meter generates a beep every 5 seconds - it facilitates
capturing time parameters.
When the measurement cycle is upheld by pressing it is indicated by: ENTER
o a short break in the beep, when the test voltage has not reached 90% or
exceeded 110% of set value,
o a short beep if the test voltage is between 90% and 110% of set value.
Bargraph shows the approximate value of the resistance.
After completion of measurement, the capacitance of the tested object is dis-
charged by shorting R ISO + R and ISO - terminals with resistance of 100 k . Ω
Save the result in the memory (see section 4.1) or press the ESC button to display
the voltage only. The last measurement result is remembered until you press the
START button or change the rotary switch position.
Additional information displayed by the meter
Test voltage is present on terminals of the meter.
The tested object is live. The measurement is blocked. Immediately
disconnect the meter from the tested object (both leads)!
Activation of current limit. The symbol displayed is accompanied by a
continuous beep.
The tested object is live. The measurement is possible, but without
guaranteed accuracy.
The insulation resistance is too low, the measurement is terminated.
This symbol appears when during the measurement the insulation
breakdowns.
Measuring range is exceeded.
The tested object is being discharged.
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3.7.2 Additional information
The meter measures the insulation resistance by applying to tested resistance R X tested voltage
UISO and measuring current I flowing through it, which is controlled from R ISO+ terminal side. In calcu-
lating the value of insulation resistance, the meter applies the technical method of resistance meas-
urement (R X=U/I). The test voltage is chosen from values: 100 V, 250 V, 500 V.
Inverter output current is limited at 1 mA level. The measurement result is correct, but on the test
terminals the test voltage is lower than voltage selected before the measurement (as illustrated in fig-
ure below). Quite often current limitation may occur in the first phase of the measurement due to
charging the capacity of the tested object.
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3.8 -voltage resistance measurement Low
NOTE!
Do not connect to the meter voltage above 440 V DC as this can damage the in-
strument.
3.8.1 Test leads resistance compensation auto-zeroing –
Switch on the meter.
Set the rotary switch to the R CONT R x position.
Set auto-zeroing according to the following algorithm.
R
◄►
R
CONT
◄►
AUTO-ZER
Close the test leads.
Press START to commence the auto-zeroing.
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When auto-zeroing is completed, the meter auto-
matically goes to the “ready for measur ment” e
screen.
The message is still displayed after switching to one of the measurement
functions (resistance or continuity measurement) in order to indicate that the meas-
urement is being made with compensated test leads resistance.
To remove compensation, perform the activities described above but with open test
leads. The message will not be displayed in the measurement screen.
Additional information displayed by the meter
Tested facility is live. The measurement is blocked. Im-
mediately disconnect the meter from the facility (both
leads).
3.8.2 -current resistance measurement Low
Switch on the meter.
Set the rotary switch to the RCONT Rx position.
If necessary, set the R
X measurement according to the following algorithm.
R
CONT
◄►
AUTO-
ZERO
◄►
R
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The meter is ready for measurement.
Connect the test leads as shown in the gure.
Read the measurement result.
Additional information displayed by the meter
Tested facility is live. The measurement is blocked. Im-
mediately disconnect the meter from the facility (both
leads).
Message (displayed after the measurement) indicates sig-
nicant disturbances in the mains during measurement.
The measurement result may include a large, unspecied
error.
Measurement range is exceeded.
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3.8.3 Measurement of resistance of protective conductors and equipoten-
tial bonding with ±200 mA current
Switch on the meter.
Set the rotary switch to the RCONT Rx.
If necessary, set the RCONT measurement according to the following algorithm.
RCONT
◄►
AUTO-ZERO
◄►
R
The meter is ready for measurement.
Connect the test leads as shown in the g . The ure
measurement starts automatically for resistance
values below 100 Ω.
Read the measurement result.
The result is the arithmetic mean of the values of
two measurements at a current of 200 mA with
opposite polarities RCONT- and RCONT+.
2
CONTCONT RR
R
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3.9 Phase sequence
Turn on the meter.
Turn the rotary switch to position .
Blinking digits indicate no or low voltage of the
phases.
Connect test leads according to the drawing.
A set of lines displayed on the bargraph indi-
cates the phase sequence:
directed to the right - correct,
directed to the left - opposite.
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Individual phase- -phase voltages may be read to
using ◄► buttons.
By pressing the ◄► buttons you can return to the display of the phase sequence.
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4 Memory of measurement results
The meter has the memory for 10 000 individual measurement results. The whole memory is di-
vided into 10 banks with 99 cells each. Due to dynamic memory allocation, each cell can contain a
dierent number of individual results, depending on the needs. This ensures optimum memory use.
Each result can be saved in a cell of a specied number and in a chosen bank, thus allowing the user
to assign the cell numbers to measurement points, and the bank numbers to tested facilities, make
the measurement in any sequence and repeat the measurements without losing other data.
The memory of measurement results is not cleared when the meter is switched o. The data can be
read later or transmitted to a computer. The number of the current cell and bank is not changed, either.
One cell can contain the results of measurements made for all measurement func-
tions.
After each entry of measurement result to a cell, the cell number is automatically in-
creased. To enter the successive results relating to a given measurement point (fa-
cility) to one cell, set the correct cell number before each entry.
Only the results of measurements activated with the START button can be entered
to the memory (with exception of auto-zeroing in the low-voltage resistance meas-
urement).
It is recommended to clear the memory after reading the data or before a new se-
ries of measurements, results of which can be saved in the same cells as previous
ones.
4.1 Entering the measurement results to the memory
After the measurement, press ENTER.
The meter is in the memory enter mode. Select
the bank and cell number acc. To section 4.2 or
leave the current one s.
Cell is empty.
Cell includes the same type of result that is to be
entered.
Cell is occupied by the displayed type of meas-
urement results.
Cell is occupied by the displayed types of meas-
urement results.
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Conrm by pressing ENTER.
An attempt to overwrite the results triggers the
warning message.
▼
Press ENTER to overwrite the result or to ESC
abort.
The screen shown left appears for a moment ac-
companied by three short audio signals. Then, the
meter again displays the last measurement result.
In case of RCD’s, this warning will be displayed also when an attempt is made to
enter a given result type (component) of the measurement made at a dierent set
IΔn current or for a dierent set RCD type (ordinary/ selective) than the results saved
in this cell. Entering the results for a dierent I
Δn rrent or other RCD type will cu
cause deletion of all previously saved results for a given RCD.
The saved data include a complete set of results (main and additional) for a given
measurement function plus the set measurement parameters.
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4.2 Changing the cell and bank number
After the measurement, press . The meter ENTER
is in the memory enter mode.
The cell number is ashing.
Use the arrows to change the cell number. ▲▼
Use the button to set the active (ash-SET/SEL
ing) cell or bank number.
The bank number is ashing.
Use the arrows to change the bank number. ▲▼
4.3 Browsing the memory
Switch on the meter.
Set the rotary switch to the position. MEM
The content of last saved cell is displayed.
The cell number is ashing.
The bank and cell number which you wish to
browse is changed with the button and SET/SEL
then with the arrows. If the cell/ bank number ▲▼
is ashing, it can be changed.
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The sequence of saving the individual measurement results is given in the table below:
Measurement function
(result group)
Component results
ZL-N, L-L
ZL-N Zor L-L
and
UL-N Uor L-L
IK
R
XL
ZL-PE or ZL-PE RCD
Z
L-PE Uand L-PE
IK
R
XL
RE
RE
Uand n
RH
RS
Er
RCD
UB
RE
tA at 0.5 I
n,
tA at 0.5 I
n,
tA at 1 In,
tA at 1 In,
tA at 2 In,
tA at 2 In,
tA at 5 In,
tA at 5 In,
IA
IA
t
Ai (absence for RCD AUTO)
t
Ai (absence for RCD AUTO)
as above (12 rows) for pulsating current
and
RISO
RISO Uand N
RISO I and
RCONT
R
CONT
RCONT-
RCONT+
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4.4 Clearing the memory
4.4.1 Clearing the bank
Switch on the meter.
Set the rotary switch to the MEM position.
Set the number of bank to be cleared as described
in . sec. 4.2
Set the cell number to (before 1). The
message appears, signaling that the meter is
ready to delete.
Press . The symbols ENTER and
appear, requiring conrmation.
Press to start deleting or to ENTER ESC
abort.
The deletion progress is shown on the
screen as scrolling cell numbers. When
deletion is completed, the meter generates
three short audio signals and sets the cell
number to 1.
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4.4.2 Clearing the whole memor y
Switch on the meter.
Set the rotary switch to the position. MEM
Set the bank number to (before 0). The
message appears, signaling that the meter is
ready to delete.
Press . The ENTER and
symbols appear, requiring conr-
mation.
Press to start deleting or ENTER
ESC to abort.
The deletion progress is shown on
the screen as scrolling bank and
cell numbers. When deletion is
completed, the meter generates
three short audio signals and sets
the cell number to 1.
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5 Troubleshooting
Before sending the instrument for repairs, call our service. Perhaps the meter is not damaged,
and the problem has been caused by some other reasons.
The meter can be repaired only at outlets authorized by the manufacturer.
Troubleshooting of typical problems during the use of the meter is described in the table below.
Measurement
function
Symptom
Cause
Action
All
The meter will not switch off
with the button.
The symbol appears
during voltage measurement.
The meter switches off during
preliminary test.
Discharged or incorrectly
placed batteries.
Check if the batteries are placed cor-
rectly; replace / charge the batteries.
If this has not helped, send the me-
ter for repair.
Measurement errors after the
meter has been transferred
from cold environment to
warm and humid one.
No acclimatization.
Do not make measurement until the
meter reaches the ambient tempera-
ture (about 30 minutes) and dries.
Fault loop and
RCD
Successive results in the
same measurement point are
significantly different.
Incorrect connections in the
tested installation.
Check and remove the defects.
Mains with a lot of disturb-
ance or unstable voltage.
Make more measurements, average
the results.
Fault loop
The meter indicates the val-
ues close to zero or zero irre-
spective of the measurement
location, and displayed val-
ues are significantly different
than expected.
Incorrectly chosen test leads
in the meter set ngs. ti
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Measurement
function
Symptom
Cause
Action
RCD
During the touch voltage or
earth resistance measure-
ment, the RCD trips (RCD
trips at only 40% of the In
set).
In set too high.
Set correct In.
Relatively high leakage cur-
rents in the installa . tion
Reduce the leakage currents.
Defects in the installation.
Verify the correctness of N and PE
connections.
The RCD does not trip during
the tripping test.
In set too low.
Set correct In.
Incorrectly set current wave-
form.
Set correct current w eform. av
Damaged RCD.
test the RCD with the TEST button;
replace if necessary.
Defects in the installation.
Verify the correctness of N and PE
connections.
During the tripping current
measurement, the sym-
bol is displayed even if the
RCD has trip ped.
The RCD tripping time is
longer than the measurement
time.
RCD should be considered defec-
tive.
Large differences between
repeated measurements of
the RCD tripping time.
Pre-magnetization of the
transformer core inside the
RCD.
Normal for some direct action resid-
ual current devices. Try to make
next measurements at reversed po-
larity of the residual current.
Measurement of tA or IA is
impossible.
Touch voltage generated dur-
ing the t A
or IA, measurement
may exceed the safe voltage
level the measurement is –
automatically blocked.
Check connections in the protective
conductor.
Verify correct RCD selection in
terms of rated residual current.
In set too high.
Set correct In.
Unstable UB or RE measure-
ment results, i.e. successive
results in the same meas-
urement point are significant-
ly different.
Significant leakage currents,
highly variable.
The symbol is not dis-
played even if the voltage be-
tween the contact electrode
and the conductor ePE x-
ceeds the detector tripping
threshold (about 50 . V)
Contact electrode does not
function well or the meter’s
input circuits are damaged.
Sent the meter for repair. Use of de-
fective meter is . not permitted
Rotary switch is not set cor-
rectly.
Contact electrode is active for the
measurements of earth loop param-
eters and RCD, with the exception of
the ZL-N,L-L UL-N,L-L function.
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6 Power supply
6.1 Monitoring the power supply voltage
The batteries charging level is indicated by the symbol located in the top right-hand corner of the
screen:
Batteries cha rged.
Batteries discharged .
Replace or charge the batteries!
Remember that:
the message on the display indicates insucient power supply voltage and the need to re-
place or charge the batteries,
the measurements made with the meter with insuicient power supply voltage have additional
measurement error which is impossible to be estimated by the user.
6.2 Replacing the batteries
The power supply of the meter is from four LR6 alkaline batteries or four NiMH rechargeable bat-
teries (size AA). The batteries are in an compartment in the bottom part of the casing.
WARNING
Before replacing the batteries, disconnect the test leads from the meter.
To replace the batteries:
1. Disconnect the leads from the measurement circuit and switch o the meter.
2. Unscrew the bolt fastening the battery compartment cover (in the bottom part of the casing).
3. Replace all batteries. Observe correct polarity when putting new batteries (“ “ at the spring part of -
the contact plate). Reversed polarity of the batteries will not damage the meter or the batteries,
but the meter will not work.
4. Put the cover in place and fasten it with the bolt.
NOTE!
After replacement of batteries, set the power supply type in the main menu be-
cause correct charging level indication depends on this. Discharging characteristics
of batteries and rechargeable batteries are dierent.
If batteries leak in the compartment, send the meter to the service outlet.
Rechargeable batteries should be charged in an external charger.
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6.3 General rules of using the Nickel Metal Hydride (Ni-MH) batteries
If you are not going to use the instrument for a longer time, remove the rechargeable batteries and
store them separately.
Store the rechargeable batteries in a dry, cool and well ventilated place and protect them from direct
sunlight. The long storage temperature should be below 30ºC. If the batteries are stored long at
high temperatures, the chemical processes may reduce their life.
The NiMH rechargeable batteries usually withstand 500-1000 charging cycles. Such batteries
achieve full capacity after forming (2-3 discharging and charging cycles). The most important factor
which inuences the battery life is the discharge level. The deeper the discharge level, the shorter
the battery life.
The memory eect appears in the NiMH batteries in a limited scope These batteries can be r. e-
charged without more serious consequences. It is, however, recommended to discharge them
completely every few cycles.
During the storage of the Ni-MH rechargeable batteries, they are subject to self-discharge process
at the rate of about 30% a month. Keeping the batteries at high temperatures may accelerate this
process even two times. In order not to allow an excessive discharging of the batteries (after which
the forming will be needed), recharge the batteries once in a while (even unused batteries).
Modern, fast chargers detect too low and too high temperature of the batteries and respond accord-
ingly. If the temperature is too low, the charging process should not start as it might irrevocably
damage a rechargeable battery. The battery temperature increase is a signal to stop the charging
and is typical. In addition to faster temperature increase of a battery which will not be fully charged,
charging at high ambient temperatures results, however, in a reduced life.
Remember that with fast charging, the batteries are charged to about 80% of their capacity; better
results can be achieved by continuing the charging process: the charger then goes into the small
current charging mode and after a few hours the batteries are fully charged.
Do not charge and do not use the batteries at extreme temperatures as they reduce the life of bat-
teries. Avoid using the battery-powered devices in very hot places. The rated operating temperature
must be observed at all times.
7 Cleaning and maintenance
NOTE!
Use only the maintenance methods presented by the manufacturer in this manual.
Clean the meter casing and the case with a wet cloth, using generally available detergents. Do
not use any solvents and cleaning media which could scratch the casing (powder, paste, etc.).
The probes can be cleaned with water and then wiped dry. Before longer storage, it is recom-
mended to lubricate the probes with any machine grease.
Clean the spools and leads with water and detergents, then wipe dry.
The meter electronic system is maintenance free.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
61
8 Storage
When storing the instrument, observe the following recommendations:
disconnect all leads from the meter,
thoroughly clean the meter and all accessories,
wind long test leads onto the spools,
if you are not going to use the instrument for a longer time, remove the batteries,
during a prolonged storage recharge the batteries from time to time to prevent total discharging.
9 Dismantling and disposal
Used electric and electronic equipment should be collected selectively, i.e. not placed with other
types of waste.
Used electronic equipment shall be sent to the collection point according to the Used Electric and
Electronic Equipment Act.
Before sending the instrument to the collection point, do not dismantle any parts by yourself.
Observe local regulations on disposal of packagings and used batteries.
MPI- - - USER MANUAL 502F ● MPI 506 ● MPI 507 –
63
Readings of short-circuit current IK
Measurement ranges according to IEC 61557 can be calculated from the measurement ranges Z
S
and rated voltages.
Display range
Resolution
Accuracy
0.110…1.999 A
0.001 A
Calculated on the basis of
accuracy for the fault loop
2.00 19.99 A …
0.01 A
20.0 199.9 A …
0.1 A
9 A 200…999
1 A
Prospective fault current calculated and displayed by the meter may slightly dier from the val-
ue calculated by the user with a calculator, basing on the displayed value of the impedance,
because the meter calculates the current from unrounded value of fault loop impedance (which
is used for displaying). As the correct value, consider Ik current value, displayed by the meter or
by rmware.
10.1.4 ZL-PE fault loop impedance measurement (without tripping the RCD) RCD
ZS fault loop impedance measurement
Measurement range according to for the 1.2 m leads, WS-03, WS- IEC 61557: 0.5…1999 Ω 04,
WS- and WS-07, and 0.51 for the 5 m, 10 m and 20 m leads 05 …1999 Ω
Display range
Resolution
Accuracy
0 19.99 … Ω
0.01 Ω
(6% m.v. + 10 digits)
20.0 199,9 … Ω
0.1 Ω
(6% m.v. + 5 digits)
200 1999 … Ω
1 Ω
(6% m.v. + 5 digits)
Does not trip the RCD’s with IΔn ≥ 30 mA
Rated operating voltage Un: 220 V, 230 V, 240 V
Voltage operating range: 180…270 V
Mains rated frequency fn: 50 Hz, 60 Hz
Frequency operating range: 45…65 Hz
Check of PE terminal connection correctness with the contact electro de
Readings of fault loop impedance RS and fault loop reactance XS
Display range
Resolution
Accuracy
0 19.99 … Ω
0.01 Ω
(6% + 10 digits) of ZS
value
20.0 199.9 … Ω
0.1 Ω
(6% + 5 digits) of ZS value
Calculated and displayed values ZS<200 Ω
Readings of short-circuit current IK
Measurement ranges according to IEC 61557 can be calculated from the measurement ranges Z
S
and rated voltages.
Display range
Resolution
Accuracy
0.110…1.999 A
0.001 A
Calculated on the basis of
accuracy for the fault loop
99 A 2.00…19.
0.01 A
20.0…199.9 A
0.1 A
9999 A 200…
1 A
Prospective fault current calculated and displayed by the meter may slightly dier from the val-
ue calculated by the user with a calculator, basing on the displayed value of the impedance,
because the meter calculates the current from unrounded value of fault loop impedance (which
is used for displaying). As the correct value, consider Ik current value, displayed by the meter or
by rmware.

Produktspecifikationer

Varumärke: Sonel
Kategori: Mätutrustning
Modell: MPI-502F

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