
6
POWER SUPPLY
The pen is powered by 4 LR44 batteries.
Check the batteries when:
• Using the unit for the rst time
• The low battery indicator appears
on the LCD
• The pen will not turn on
LCD DISPLAY
Hold data on the LCD
Calibration Mode
Low battery indicator
Unit of conductivity
Measured value
Unit of TDS and
Salinity
Unit of liquid
temperature °C or °F
Temperature reading
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