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1. As soon as a sufficient power supply is not ensured, the symbol appears on the
LCD display
2. For this purpose the device must be switched off. The battery compartment
cover on the back of the instrument is opened by simultaneously pressing and
sliding it in the direction of the arrow.
3. The battery is removed from the housing and replaced by a new 9V block
battery.
4. Then the battery cover is reattached.
8 Maintenance
1. The white protective cap on the photo sensor should be wiped with a damp cloth
from time to time.
2. The Light Meter should not be stored at excessive temperature or humidity.
3. The respective period of time for a calibration of the photo sensor varies with
the working operations. In general, the light sensitivity decreases directly
proportional to the product of the light intensity of the working time.
To maintain the general accuracy of the instrument, periodic calibration is
recommended.
9 Examples of recommended illuminance levels
Office
Conference/reception room
Office work
machine writing, technical drawing
School
Lecture hall, gymnasium
Classroom
Laboratory, library, drawing room
Hospital
Sickroom, storage
Room for medical examinations
Operating room
Emergency room
Factory
Packing work, goods receipt
Work on the assembly line
Visual inspection work
Assembly work of electronic parts
Hotel
6
and a battery change with a 9V block battery is necessary.
700-1500
1000-2000
200-750
500-1500
100-200
300-750
750-1500
1500-3000
200-750
100-300
750-1500
150-300
300-750
750-1500
SP-BA-e-2020
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