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Figure 30
Re-Calibration of the device
If the calibration fails, e.g. due to unfavorable radiation background
conditions or insufficient statistics of the radiation, the failure is
substantiated by an error message (see
Error Message
Error No.
Possible Reason
What to do
real time = 0
1
Internal error
Call service
no counts
2
No detector
available, Detector
failure or HV
failure.
Check detector by using
a radioactive source and
the SPECTRUM mode.
3; 6
Radiation
background too
high to find the
correct gamma line
or wrong
adjustment of
noise level.
Check for presence of
radiation sources.
Leave the area of
increased background
activity.
Unknown
source present.
Remove all
sources and
press AGAIN
Move the calibration
source (if external Cs-137
available) away from
device.
Check count rate in low
background area.
No reference
source present
User‟ s Manual
4; 7
Wrong HV value
(detector
exchanged, device
temperature out of
range) or low
 48 
Try using an external Cs137 source (if available)
for calibration.
Check temperature of
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