5. max and min values inquiry key
6. Lux/Fc unit conversion key
7. Compound key for data hold and zero calibration:
Data hold: Short press the key to enter/exit data
hold mode.
Zero calibration: Long press for 1 second to perform
Zero calibration function.
8. Compound key for relative value and peak value measurement:
Relative value measurement: short press the key to enter/exit
relative value measurement mode.
Peak value measurement: long press for 1 second to enter/exit peak
value measurement mode.
9. Key for manual range switching: Short press the key for 20.00Lux
200.0Lux 2000Lux 20000Lux 200000Lux (or 20.00Fc
200.0Fc 2000Fc 20000Fc) circulation; Long press for 1 second
to exit manual range switching mode.
LCD display interface
1. Prompt for manual range switching mode
2. Prompt for data hold mode
3. The analog bar shows the current measurement value information.
4. The digit shows the current measurement value information.
5. Lux unit
6. FC unit
Prompt for auto measurement mode
7. Prompt for peak value measurement mode
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