KERN & SOHN SO 200K - Manual (Page 2)

Sauter GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected] Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Instruction Manual
SO 200K
SO 200K-BA-e-1311 2
1. LCD Display: 3 ½ digits with a maximum reading of
1999.
2. Power key: the power key turns the light meter ON or
OFF.
3. Data-Peak button: the PEAK key has to be pressed
again to clear the peak recording mode.
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. Data-Hold button: If the HOLD key is pressed, the
HOLD mode is selected. When this mode is being
selected, 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 be ready to take
measurements.
6. Lux/FC Unit button: This key has to be pressed to
choose the Lux or FC unit.
7. Photo detector
5. Spectral sensitivity characteristics
Concerning the detector, the applied photo diode with
filters makes the spectral sensitivity 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 has to 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. Data-PEAK mode: The PEAK key has to be pressed to
select the PEAK mode. If this item is selected, the light
meter stops all further measurements. If the PEAK key is
pressed again, P-H mode is being cancelled and it returns
to normal operation.
8. When the measurement is completed, the photo
detector cap has to be clipped on again and the power key
has to be turned off.
7. Battery check and replacement
1. As the battery power is not sufficient, the LCD will
display the symbol and replacement of a new
battery type 9V is required.
2. Therefore, the instrument has to be powered off. Then
the battery cover has to be pressed and pushed (at the
same time) in the direction of the arrow shows to open.
3. The battery has to be disconnected from the instrument
and replaced with a standard 9V transistor battery.
4. The battery cover has to be snapped on again.
8. Maintenance
1. The white plastic disc on the top of the detector should
be cleaned with a damp cloth from time to time and if
necessary.
2. The instrument may not be stored when temperature or
humidity is excessively high.
3. The reference level, as the marker on the face plate, is
the tiof thep photo detector globe.
4. The calibration interval for the photo detector will vary
according to operational conditions, but generally the
sensitivity decreases in direct proportion to the product of
luminous intensity by the operational time.
In order to maintain the basic accuracy of the instrument, a
periodical calibration is recommended.
9. Recommended illumination
Locations Lux