Instruction Manual

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3.4 Keypad
Diagram- 3
Key
Functions
⚫ Power on/off
⚫ The meter will automatically shut off 10 mins after last key press
⚫ In measurement mode: press to enter calibration mode
⚫ In calibration mode: press to exit calibration mode
⚫ In measurement mode: long press to switch measurement units NTU-FTU
⚫ In measuring mode: Short press the key to perform single-shot measurement;
long press the key to perform continuous measurement
⚫ In calibration mode: press the key to confirm the calibration.
⚫ In calibration mode, press the key to select standard solution.
3.5 Power Supply
1. The instrument adopts 4 pieces of AA alkaline battery. Make sure there is no mixture of new & old
batteries or different models of batteries.
2. Battery capacity indication
Battery capacity icon: please replace new batteries when
icon displays to ensure measuring accuracy; when icon displays, the battery must be
replaced, otherwise the instrument cannot work properly. To extend battery life, user can setup
auto-power off timer in Parameter Setup P6 according to usage requirements
3. Use the screwdriver to remove the four screws on the battery cover and open the battery cover.
Insert 4 pieces of AA alkaline battery. Please make sure the polarity is correct. Put on the battery
cover and screw tightly.