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