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3. Remove the photo detector cap and face it light source
in a horizontal position.
4. Read the illuminance nominal from the LCD display.
5. Overrange: If the instrument only displays “OL”, the
input signal is too strong, and a higher range should be
selected.
6. Data-Hold mode: Press the hold key to select Data-Hold
mode. When HOLD mode is selected, the illuminance
meter stops all further measurements. Press the HOLD
key again to exit Data-Hold mode. Then it resumes
normal operation.
7. Peak-Hold recorder mode: Press and hold down PEAK
key until display shows the “CAL” letter, then press
PEAK key cycle through Pmax and Pmin recorder mode,
and expose the photo detector to light pulse measuring
field. Press and hold down PEAK key 2 seconds to exit
PEAK recorder mode, then the meter will resume
normal operation.
