ADWA AD12 User Manual

USER MANUAL
AD11 & AD12
Waterproof pH Testers
www.adwainstruments.com
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 / Life
4 x 1.5V button type / 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
INTRODUCTION
AD11 and AD12 are waterproof pH and tem-
perature testers. The housing has been com-
pletely 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 mod-
els 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 re-
placed 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
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
FRONT PANEL & DISPLAY
1. Stability indicator (hourglass symbol)
2. Low battery warning indicator
3. Calibration mode / calibrated meter indica-
tion
4. ATC (Automatic Temperature Compensa-
tion) indicator
5. Secondary LCD level
6. Primary LCD level
7. Measurement unit for primary level
ELECTRODES & SOLUTIONS
A70004P pH 4.01 buffer, 20 ml, 25 pcs
A70007P pH 7.01 buffer, 20 ml, 25 pcs
A70010P pH 10.01 buffer, 20 ml, 25 pcs
AD11P Spare pH electrode
ISTAD12 06/07
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 sales@adwainstruments.com.

ADWA AD12 Specifications

General

pH Range	0.00 to 14.00 pH
pH Resolution	0.01 pH
pH Accuracy	±0.01 pH
mV Resolution	1 mV
Battery Type	4 x 1.5V AAA
Display	LCD
Temperature Range	-5.0 to 105.0 °C
Temperature Resolution	0.1 °C/°F
Temperature Accuracy	±0.5 °C
pH Calibration	Up to 3 points
Temperature Compensation	Automatic from -5.0 to 105.0°C (23 to 221°F)
Electrode	Included
Temperature Probe	AD7662, included
Battery Life	Approx. 200 hours
Environment	0 to 50 °C, RH max 95%

Summary

Introduction

Front Panel and Display Overview

Front Panel Components

Identifies key components of the pH tester's front panel and display, including LCD, buttons, and electrode connector.

Technical Specifications

Measurement Range and Resolution

Details the pH and temperature measurement ranges and their respective resolutions for accurate readings.

Accuracy and Calibration

Specifies the accuracy of pH and temperature measurements and the automatic calibration process.

Environmental and Power Details

Outlines operating environment, dimensions, weight, and battery life for the pH testers.

pH Electrode Information

AD11P Electrode Details

Describes the included AD11P pH electrode, its automatic temperature compensation, and calibration features.

Operational Guide

Turning the Meter On and Off

Instructions for powering the pH tester on and off, including visual indicators.

Display Control and Freezing

How to freeze the current measurement reading on the LCD and return to normal mode.

pH Measurement and Calibration

Taking pH Measurements

Steps for correctly measuring pH, including submerging the electrode and waiting for stability.

pH Calibration Procedure

Detailed steps for calibrating the pH meter, including single-point and two-point methods.

Exiting Calibration and Resetting

Procedures to quit calibration mode or reset the meter to default calibration values.

Setup Menu Options

Temperature Unit Selection

Guide on selecting between Celsius (°C) and Fahrenheit (°F) for temperature display.

Calibration Buffer Set Configuration

Instructions for choosing the calibration buffer set (e.g., 4.01/7.01/10.01 or NIST).

Electrode Maintenance and Battery Replacement

Electrode Storage and Care

Best practices for storing and maintaining the pH electrode to ensure longevity and accuracy.

Battery Replacement Procedure

Steps for replacing the meter's batteries, emphasizing proper sealing for water resistance.