B) Lcd Display; C) Keypad - VOLTCRAFT PHT-600 Operating Instructions Manual

b) LCD Display

A
B
A Measured value (pH)
B Calibration error indicator
C Low battery indicator
D Calibration Mode (CAL)
E Temperature (ºC)
F Manual Temperature Compensation (MTC)

c) Keypad

Button Description
Press to turn power on/off.
Press and hold 3 seconds to enter calibration mode "CAL"
Manual temperature compensation "MTC".
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C D E F