Apera Instruments PH800

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4.2 Keypad
Short Press — <1.5 s；Long Press — >1.5 s
Table-1 Keypad Operation and Functions
Keypad
Operation
Functions
Short Press
 Power on/off
Short Press
Choose measuring mode:
 pH Meter： →
 pH/Conductivity Meter： → →
Long Press
 Enter parameter setting
Short Press
 Enter calibration mode
Short Press
 In pH mode: choose resolution: 0.1 pH→0.01pH
 In conductivity mode, choose measuring mode: → → →
Short Press
 In calibration mode: press to calibrate
 In parameter setting mode: press to confirm choice
Short Press
 Cancel any operation, the meter goes back to measurement mode
Short Press
 Save measuring data
Long Press
 Recall saved measuring data
Short Press
or Long
Press
 In manual temperature compensation (MTC) mode: Short press to adjust
temperature, long press to adjust swiftly
 In parameter setting mode: press to change the numbering of parameters in
main menu and sub-menu.
 In sub-menu, press to change parameters and settings.
 In recall mode (RM), short press to change numberings, long press to change
swiftly.
Figure-2