Pro'sKit MT-4617LED - Applications; Application of manual switchover of range measurement mode

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In any mode with sensor covered, press and hold data hold/zero
calibration key ⑦ for one second, “ADJ” will appear on the LCD
interface, and the device will enter the zero calibration mode: several
seconds later “ADJ” will 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.
Applications
Application of manual switchover of range measurement mode
 Long press the RAN key, “MANU” will appear on the top left position
of the LCD, it means the meter is in the manual measurement mode
(as shown in figure 3-1-1);
 When in manual measurement mode, long press RAN key for 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” will switch to
“AUTO” on the top left position of the LCD, the device will return to
auto range measurement mode;