ADWA AD33, AD34, AD35, AD36 - Waterproof EC And TDS Tester Manual

INTRODUCTION

These instruments are in compliance with the EMC Directive 89/336/EEC and Low Voltage Directive 73/23/EEC for electrical equipments.

For additional technical information, please email us at sales@adwainstruments.com.

AD33, AD34, AD35 and AD36 are waterproof EC and TDS testers, that also measure temperature. The housing has been completely sealed against humidity.

All EC and TDS readings are automatically temperature compensated, and temperature values can be displayed in °C or °F units.

EC (or TDS) calibration is automatic at one point, while temperature range is factory calibrated and can only be adjusted by the user.

The AD33P 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.

To prolong battery life, these models are provided with an auto-off feature that turns them off after 5 minutes of non-use.

Moreover, when batteries become too weak to ensure reliable readings the meter automatically turns off.

Each meter is supplied complete with:

• AD33P EC probe
• 4 x 1.5V batteries, button type
• User manual

FRONT PANEL & DISPLAY

1. Dual line LCD
2. ON/OFF button
3. HOLD button
4. EC probe & temperature sensor
5. Probe body
6. Battery compartment (inside)
7. CAL button
8. Clip holder

1. HOLD indicator
2. Calibration mode indicator
3. Secondary LCD level with measure units
4. Primary LCD level
5. Measurement units for primary LCD level
   (µS for AD33-AD35, ppm for AD34-AD36)

TECHNICAL DATA

Range
0.0 to 60.0°C / 32.0 to 140.0°F
0 to 1999 µS/cm (AD33)
0 to 1999 ppm (AD34)
0 to 199.9 µS/cm (AD35)
0 to 199.9 ppm (AD36)

Resolution
0.1°C / 0.1°F
1 µS/cm (AD33)
1 ppm (AD34)
0.1 µS/cm (AD35)
0.1 ppm (AD36)

Accuracy (@20°C/68°F)
±0.5°C / ±1°F
±2% f.s. (EC/TDS)

Calibration
EC & TDS: automatic, 1 point
Temperature: adjustment

Probe
AD33P (included)

Battery Type / Life
4 x 1.5V button type
Approx. 150 hours of use

Auto-off
After 5 minutes of non-use

Environment
0 to 50°C (32 to 105°F);
RH 100%

Dimensions/Weight
175.5 x 39 x 23 mm / 100 g

PROBE & SOLUTIONS

OPERATIONAL GUIDE

Turn the meter on

• Press the ON/OFF button. All the used seg-ments will be visible for one second (or as long as the button is pressed), then the meter enter normal measurement mode.

Taking measurements

• Submerge the probe in the solution to betested while stirring it gently.
• The EC or TDS value automatically compen-sated 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.

Freeze the display

• From measurement mode, press the HOLD button. The H tag lights up and the reading is frozen on the LCD. Press any button to return to normal mode.
  

Change the temperature unit (°C/°F)

• To change the temperature measure unit, press the HOLD button for 2 seconds.

Turn the meter off

• From measurement mode, press the ON/OFF button.

Note: If measurements are taken in different samples successively, rinse the probe thoroughly to eliminate crosscontamination. After cleaning, rinse the probe with some of the sample to be measured.

EC / TDS 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 measuringmode, press the CAL button for 2 seconds and the CAL message appears on the LCD.
  
• Release the button and im-merse the probe in a proper calibration solution. The CAL tag lights up to indicate that the meter is in calibration mode.
  

Note: The calibration solution value must be within the meter measurement range.

• Wait a few seconds for the reading to stabi-lize, then use the CAL and HOLD buttons to set the solution value (CAL to increase the value, HOLD to decrease it).
• The calibration will be automatically per-formed.
• To confirm the calibration, press ON/OFF for 2 seconds. The LCD will show the "Sto" message and then return to normal operation.
  
• To quit the procedure with-out saving, press the ON/OFF button. The LCD will show the "ESC" message and then return to normal operation.
  

TEMPERATURE ADJUSTMENT

These meters are factory calibrated for temperature readings, and the user can only perform an adjustment using an accurate reference thermometer.

Procedure

• From normal measuringmode, press for 2 seconds the CAL (first) and HOLD buttons until the CAL message on the LCD is replaced by the temperature reading.
  
• Release the buttons and immerse the probeand an accurate reference thermometer into the sample solution.
• Read the temperature measured by the refer-ence thermometer.
• Wait a few seconds for the reading to stabi-lize on the tester, then adjust it accordingly with the thermometer, using the CAL and HOLD buttons (CAL to increase the value, HOLD to decrease it).
• To confirm press ON/OFF for 2 seconds. TheLCD will show the "Sto" message and then return to normal operation.
• To quit the procedure without saving, pressthe ON/OFF button. The LCD will show the "ESC" message and then return to normal operation.

PROBE REPLACEMENT

The probe can be easily replaced by unscrewing the body as shown below.

BATTERY REPLACEMENT

When the batteries become too weak to ensure reliable readings, the "Eb" message appears on the LCD, then the meter turns off.

Batteries must be replaced.

Unscrew and release the probe body. Take out the battery compartment and carefully replace all four batteries while paying attention to their polarity.
Reattach and tighten the probe body properly to ensure a watertight seal.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download ADWA AD33, AD34, AD35, AD36 - Waterproof EC And TDS Tester Manual