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1. Introduction
Thank you for selecting an accumet
®
AP85 meter. This portable meter is a
microprocessor-based instrument that measures pH, conductivity, Total Dissolved
Solids (TDS) and temperature. Your meter has many user-friendly features, all of
which are accessible through the membrane keypad.
Your meter includes a single-junction pH electrode, a combination conductivity/
temperature probe, and batteries. Please read this manual thoroughly before
operating your meter.
2. Display and Keypad Functions
Display
The LCD has a primary and secondary display.
• The primary display shows the measured pH or conductivity reading.
• The secondary display shows the temperature of the reading.
The display also shows error messages, keypad functions and program functions.
2.1
Primary display
Secondary display
3.
2.
19
18.
12.
15.
14.
13.
11.
1.
17.
16.
4.
9.
10.
5.
6.
1.
SETUP mode indicator
2.
MEASurement mode
indicator
3.
CALibration indicator
4.
pH measurement
indicator
5.
Millisiemens indicator
(conductivity)
6.
Microsiemens indicator
(conductivity)
7.
Parts per thousand
indicator (TDS)
8.
Parts per million
indicator (TDS)
9.
Temperature
indicators
10.
pH setup indicator
11.
Automatic
Temperature
Compensation
indicator
12.
ERRor indicator
13.
Low battery indicator
14.
Probe indicator
15.
Calibration indicator
16.
Cell constant indicator
17.
ON/OFF indicator
18.
HOLD indicator
19.
READY indicator
7.
8.
