Berthold LB 444 K-40 - Service Instructions; General Service Safety; Evaluation Unit Service

01/10 347 LB 444 K-40
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9 Service Instructions
9.1 General Safety Precautions
Any time you are working on electrical components, you have to observe the relevant
safety regulations. Please refer to the Safety Summary at the beginning of this operating
manual.
9.2 Evaluation Unit LB 444 K-40
The evaluation unit is provided with an error control which also monitors the detector
functions. An error code appears on the display if an error is detected. For information
about the error and possible causes please refer to the error code list. In case of
hardware errors the evaluation unit has to be replaced.
If no error code is displayed, the electronics is working properly and all measured values
and parameters lie in the normal possible range. Possible function problems must then
have another cause.
“Total Reset” should be performed only in exceptional cases and after consultation with
Berthold.
To perform a “Total Reset”, turn the instrument off; then push the Clear button while
you turn the instrument on.
All entered date will be deleted and the default values restored.
Error code list
No. Problem Cause
1 Rate Overflow Count rate > 520000cps
2 No Detector Rate Error in detector or during transmission
3 Wrong HV HV < 500V or > 1500V, outside control range
6 Detector temperature >
65°C
Detector temperature has exceeded > 65°C
7 Trouble with detector
communication
Data transfer between detector and evaluation unit
faulty
8 Measurement stopped Measurement stopped by closed contact 22 a/c
9 Detector temperature >
80°C
Detector temperature has exceeded > 80°C
10 Missing calibration Calibration has to be terminated with <enter> and
<more>
11 Power fail > 1 month Instrument has been turned off for more than one
month. Enter new date
12 No input allowed Device locked by password or wrong password entered
33 Wrong password Wrong password entered
36 Missing calib. points Not enough calibration points available
37 Curve not clear Calibration not steady
39 Measuring path not defined Measuring path not yet entered
46 Radiatin
g
interference New start with <run> or via in
p
ut 3
(
22a
/
22c
)