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Table – 1 Keypad operations and descriptions
Keypad
Operations
Descriptions
Short press
l
Press this key to turn on or turn off the meter.
Short press
Select measurement parameters:
l
pH meter:
→
,
Long press
l
In measurement mode, press this key to enter main menu.
Short press
l
In measurement mode, press this key to enter in calibration
mode,
l
In recall mode (RM), press this key to return to measurement
mode,
l
Cancel any operation to return to measurement mode.
Short press
l
In measurement mode, press this key to turn on or turn off
backlight,
l
In calibration mode, press this key to conduct calibration,
l
In main menu, press this key to enter submenu,
l
In submenu, press this key to enter parameter set-up
mode,
l
In parameter set-up mode, press this key to confirm parameters.
Long press
l
In pH measurement mode, press and hold this key to change the
resolution repeatedly:
0.01→ 0.1pH
Short/
long press
l
In the mode of manual temperature compensation (MTC), when press
and hold this key, the temperature value flashes, then press this key to
change the temperature value, and press to confirm,
l
In measurement mode, press to store the measuring value,
press to recall the stored measuring value,
l
In recall mode (RM), short press this key to change the
storage numberings, press and hold this key to change the number
quickly,
l
In the main menu and submenu mode, press this key to change the
numbering of the main menu and the submenu,
l
In the parameter set-up mode, press this key to select parameters.
3.3 Display mode
3.3.1 Reading stability display mode
When the measuring value is stable, smiley icon appears on LCD, see
Diagram – 5. If icon does not appear or flash, please do not get the
reading value or make calibration until the measuring value is stable.
Diagram - 3
