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Adwa Mätutrustning AD32

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USER MANUAL

AD31 & AD32

Waterproof EC/TDS Testers

Dear Customer,

Thank you for choosing an Adwa product.

Please read carefully this manual before

starting operations.

This instrument is in compliance with the

EMC directive 2004/108/EC and its stan-

dards, and Low Voltage Directive 2006/95/

EC and its standards for electrical equip-

ments.

For additional technical information, please

e-mail us at sales@adwainstruments.com.

INTRODUCTION

AD31 and AD32 are waterproof EC, TDS and

temperature testers. The housing has been

completely sealed against humidity.

All EC and TDS readings are automatically

temperature compensated (AT C), and

temperature values can be displayed in °C

or °F units.

The EC/TDS conversion factor (CONV) can

be selected by the user, as well as the coefficient

β (BETA) for temperature compensation. The

instruments can be calibrated at one point.

Measurements are highly accurate with a

unique stability indicator right on the LCD.

The models are also provided with a low

battery symbol which warns the user when

the batteries need to be replaced.

The AD32P probe supplied with the meters,

is interchangeable and can be easily replaced

by the user.

The encapsulated temperature sensor allows

fast and accurate temperature measurement

and compensation.

Each meter is supplied complete with:

•AD32P EC probe

• 4 x 1.5V batteries, button type

• User manual

FRONT PANEL & DISPLAY

1. Dual line LCD

2. ON/OFF/ MODE button

3. EC probe & temperature sensor

4. Probe body

5. Battery compartment (inside)

6. SET/HOLD button

7. Clip holder

1. Percentage indicator for battery life

2. Stability indicator (hourglass symbol)

3. Low battery warning indicator

4. Calibrated meter indication

5. ATC (Automatic Temperature Compensation)

indicator

6. Secondary LCD level

7. Primary LCD level

8. Measurement unit for primary level

(ppm & μS for AD31, ppt & mS for AD32)

ISTAD31 09/14

TECHNICAL DATA

Range 0.0 to 60.0 °C / 32.0 to 140.0 °F

0 to 3999 μS/cm / 0 to 2000 ppm (AD31)

0.00 to 20.00 mS/cm / 0.00 to 10.00 ppt (AD32)

Resolution 0.1 °C / 0.1 °F

1 μS/cm / 1 ppm (AD31)

0.01 mS/cm / 1 ppt (AD32)

Accuracy ±0.5 °C / ±1 °F

(@25 °C/77 °F) ±2% f.s. (EC/TDS)

Calibration Automatic, 1 point

1413 μS/cm, 1382 ppm or 1500 ppm (AD31)

12.88 mS/cm, 6.44 ppt or 9.02 ppt (AD32)

TDS Factor

User-selectable from 0.45 to 1.00

Temperature Compensation

Automatic, from 0 to 60 °C

β adjustable from 0.0 to 2.4%/°C

Probe AD32P (included)

Battery Type 4 x 1.5V button type

Battery Life Approx. 100 hours of use

Auto-off After 8 minutes of non-use

Environment

-5 to 50 °C (23 to122 °F); RH 100%

Dimensions 175.5 x 39 x 23 mm

Weight 100 g

AD32P Spare EC probe for AD31 &

AD32

AD70031P 1413 μS/cm EC standard solution

20 ml sachet (25 pcs.)

AD70030P 12.88 mS/cm EC standard solution

20 ml sachet (25 pcs.)

AD70032P 1382 ppm solution TDS standard

20 ml sachet (25 pcs.)

AD70442P 1500 ppm solution TDS standard

20 ml sachet (25 pcs.)

PROBE & SOLUTIONS

Turn the meter on

• Press and hold the ON/OFF/MODE button

until the LCD lights up. All the used

segments will be visible for one second

(or as long as the button is pressed),

followed by the percentage indication of

the remaining battery life. Then the meter

enter normal measurement mode.

Freeze the display

• While in measurement mode, press the

SET/HOLD button. The reading will be

frozen on the LCD. Press any button to

return to normal mode.

Turn the meter off

• While in measurement mode, press the

ON/OFF/MODE button. OFF will appear

on the secondary display. Release the

button.

Note: If measurements are taken in different

samples successively, rinse the probe

thoroughly to eliminate cross-con-

tamination. After cleaning, rinse the

probe with some of the sample to be

measured.

OPERATIONAL GUIDE

MEASUREMENT & CALIBRATION

EC Calibration

For better accuracy, frequent calibration of

the tester is recommended. In addition,

calibration should be performed whenever the

probe is replaced, after testing aggressive

chemicals and where high accuracy is required.

Calibration Procedure

• From normal EC measuring mode, press

and hold the ON/OFF/MODE button until

OFF on the secondary LCD is replaced by

CAL.

• Release the button and immerse the probe

in the proper calibration solution

(AD70031 for AD31 and AD70030 for

AD32).

• Once the calibration has been automatically

performed, the LCD will display OK for one

second and the meter will return to normal

measurement mode.

The CAL symbol on the LCD means that the

meter is calibrated.

Note: Since there is a known relationship

between EC and TDS readings, it is

not necessary to calibrate the meter

in TDS. If the conversion factor is

either 0.5 or 0.7, the meter will allow a

direct calibration in ppm (or ppt) by

using the Adwa calibration solution

(see “Probe and Solution” section).

Note: To exit calibration and return to the

last calibration data press the ON/

OFF/MODE button. The secondary

LCD will display “ESC” for one second

and the meter will return to normal

mode.

Note: To reset to the default calibration

value and clear a previous calibration,

press the SET/HOLD button after

entering the calibration mode. The

secondary LCD will display “CLR”

for one second and the meter will

return to normal mode. The CAL

symbol on the LCD will disappear.

SETUP

Setup mode allows the selection of temperature

unit, TDS factor (CONV) and temperature

compensation coefficient (BETA).

To enter the setup mode, press the ON/OFF/

MODE button until CAL on the secondary

display is replaced by TEMP and the current

temperature unit (e.g. TEMP °C). Then:

For °C/°F selection:

• Use the SET/HOLD button.

• Press the ON/OFF/MODE button once to

set the TDS factor, twice for selecting the

temperature coefficient, or three times to

return to the normal measuring mode.

For TDS factor (CONV) selection:

• After the temperature unit has been selected,

press the ON/OFF/MODE button again to

show the current conversion factor (e.g.

0.50 CONV).

• Press SET/HOLD to change the value.

• Press the ON/OFF/MODE button once to

set the temperature coefficient, or twice to

return to the normal measuring mode.

For selecting the temperature compensation

coefficient (BETA):

• After setting the TDS factor, press the

ON/OFF/MODE button to show the current

temperature compensation coefficient (e.g.

2.1 BETA).

• Press SET/HOLD to change the value.

• Press the ON/OFF/MODE button to return

to the normal measuring mode.

When the batteries become weak, the battery

symbol on the LCD lights up to indicate a

low battery condition. Batteries should be

replaced soon.

To change the batteries, unscrew and release the

electrode body. Take out the battery compartment

and carefully replace all four batteries while

paying attention to their polarity.

Reattach and tighten the electrode body properly

to ensure a watertight seal.

BATTERY REPLACEMENT

PROBE REPLACEMENT

The probe can be easily replaced by unscrewing

the body as shown below.

Taking Measurement

• Select the desired EC or TDS mode by

pressing the SET/HOLD button.

• Submerge the probe in the solution to be

tested while stirring it gently.

• Measurements should be taken when the

stability indicator (hourglass) disappears.

• The EC or TDS value automatically

compensated for temperature is shown on

the primary LCD level while the secondary

one shows the sample temperature.

Note: Before taking any measurement, make

sure the meter has been calibrated (CAL

tag is displayed).

Produktspecifikationer

Varumärke:	Adwa
Kategori:	Mätutrustning
Modell:	AD32

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