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www.adwainstruments.com
USER MANUAL
AD11 & AD12
Waterproof pH Testers
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 sales@adwainstruments.com.
INTRODUCTION
AD11 and AD12 are waterproof pH and
temperature testers. The housing has been
completely sealed against humidity.
All pH readings are automatically temperature
compensated (ATC), and temperature values
can be displayed in °C or °F units.
The meter can be calibrated at one or two
points for pH with auto-buffer recognition
and against five memorized buffer values.
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 AD11P pH electrode, supplied with the
meter, 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:
• AD11P pH electrode
• 4 x 1.5V batteries, button type
• User manual
FRONT PANEL & DISPLAY
1. Dual line LCD
2. ON/OFF/ MODE button
3. pH electrode & temperature sensor
4. Electrode body
5. Battery compartment (inside)
6. SET/HOLD button
7. Clip holder
1. Stability indicator (hourglass symbol)
2. Low battery warning indicator
3. Calibration mode / calibrated meter indication
4. ATC (Automatic Temperature Compensation)
indicator
5. Secondary LCD level
6. Primary LCD level
7. Measurement unit for primary level
TECHNICAL DATA
Range -2.0 to 16.0 pH (AD11)
-2.00 to 16.00 pH (AD12)
-5.0 to 60.0°C / 23.0 to 140.0°F
Resolution 0.1 / 0.01 pH
0.1°C / 0.1°F
Accuracy (@20°C/68°F)
±0.1 / ±0.01 pH
±0.5°C / ±1°F
pH Calibration
Automatic, 1 or 2 point
with 2 sets of memorized buffers
(pH 4.01/7.01/10.01 or 4.01/6.86/9.18)
pH Electrode AD11P (included)
Temperature Compensation
Automatic
Battery Type 4 x 1.5V button type
Battery Life Approx. 300 h 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
AD11P Spare pH electrode
A70004P pH 4.01 buffer, 20 ml, 25 pcs
A7004M pH 4.01 buffer, 230 ml bottle
A70007P pH 7.01 buffer, 20 ml, 25 pcs
A7007M pH 7.01 buffer, 230 ml bottle
A70010P pH 10.01 buffer, 20 ml, 25 pcs
A7010M pH 10.01 buffer, 230 ml bottle
A7061M Electrode cleaning solution,
230 ml
A70300M Storage solution, 230 ml
ELECTRODES & SOLUTIONS
ISTAD12 04/10
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