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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 exces-
sively high.
3. 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
Office
Meeting room
Office work
Drawing, PC work
School
Big Classroom, Gym
Classroom
Labratory, libary, drawing room
Hospital
Sickroom, Storage
Treatment room
Operating
Emergancy department
6
200-750
700-1500
1000-2000
100-300
200-750
500-1500
100-200
300-750
750-1500
750-1500
SP_200K-BA-e-1811
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