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3. HOLD button: With the HOLD key you can freeze the actual measurement
value. The device does not show any other measurement values, unless the
HOLD button is pressed again.
4. Range button: the range button has to be pressed to change the ranges of
200Lux/20FC; 2.000Lux/200FC; 20.000Lux/2.000FC; 200.000Lux/ 20.000FC
circularly.
5. Lux/FC Unit button: This key has to be pressed to change between the Lux or
FC unit.
6. Photo detector
7. Cover of the photo sensor. It serves to protect the sensor if you don't use the
light meter.
5. Spectral sensitivity characteristics
Concerning the detector, the applied photo diode with filters makes the spectral sen-
sitivity characteristic almost meeting the standard C.I.E. (International Commission
on Illumination) photopic curve V ( ) as described in the following chart below:
6. Operation instructions
1. Power-key: The power key has to be pressed to turn the light meter ON or
OFF.
2. Selection of the Lux/FC scale: The range selection switch has to be set to
the desired Lux/FC range.
3. The photo detector cap has to be removed and it has to be faced to the light
source in a horizontal position.
4. The illuminance nominal value can now be read from the LCD display.
5. Over range: If the instrument only displays one "1" in the M.S.D., the input
signal has been too strong and a higher range should be selected.
6. Data-HOLD mode: The HOLD key has to be pressed to select the HOLD
mode, the light meter will stop all further measurements. If the HOLD button is
pressed again, this operation will be cancelled and the light meter will return to
normal operation.
7. When the measurement is completed, the photo detector cap has to be
clipped on again and the power key has to be turned off.
8. Turn the device off
SP_200K-BA-e-1811
5
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