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13
disappear from the LCD interface, and the device will exit
the data hold mode and return to auto measurement mode.
Tips
1: The reference position of light source test is at top of
sphere surface under light.
2: In various measurement modes, analog bar in the middle
of the LCD screen will change with figures of Nixie tubes.
3: When reading, existing data can be locked by pressing
and holding “HOLD/ZERO” key for a short time;
4: In zero calibration mode, the opto-sensor must be
covered by opto-sensor visor before calibration.
5: After completing the test, the sensor protection cover
should be put back to protect light filter and sensor.
Specific Application
Application of manual switchover of range
measurement mode
Press and hold the RAN key (range manual switchover
key) for a short time, “MANU” will appear on the top left
position of the LCD interface, and the meter will enter
the manual switchover measurement mode (as shown in
figure 3-1-1);
When entering manual switchover of range function,
press RAN key for a short time each time, it will switch to
20.00Lux—>200.0Lux—>2000Lux—>
20000Lux—>200000Lux (or 20.00Fc—>200.0 Fc—>
2000 Fc—>20000 Fc) in sequence;
Press and hold RAN key for one second, “MANU” on the
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