USER MANUAL
AD33 • AD34 • AD35 • AD36
Waterproof EC and TDS Testers
w w w . a d w a i n s t r u m e n t s . c o m
INTRODUCTION
AD33, AD34, AD35 and AD36 are waterproof
EC and TDS testers, that also measure tempera-
ture. The housing has been completely sealed
against humidity.
All EC and TDS readings are automatically
temperature compensated, and temperature val-
ues can be displayed in °C or °F units.
EC (or TDS) calibration is automatic at one
point, while temperature range is factory cali-
brated 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 pro-
vided 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. 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)
IS
T
AD36 07/07
Dear Customer,
Thank you for choosing an Adwa product.
Please read carefully this manual before starting
operations.
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 e-
mail us at [email protected].
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
PROBE & SOLUTIONS
AD33P
Spare EC probe for AD33,
AD34, AD35, AD36
A70031P 1413 µS/cm solution, 20 ml,
25 pcs
A70030P 12.88mS/cm solution, 20 ml
A70032P 1382 ppm (mg/l) solution, 20
ml, 25 pcs
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