Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
2 – 225
Volume 2 4 Repair, Maintenance and Service
2
4.7 Replacing the Crystal-Multiplier Assem-
bly (for Point Detector)
Explosion hazard!
Spare parts for detectors used in hazardous areas may only be
installed by BERTHOLD TECHNOLOGIES service personnel or by
persons authorized by BERTHOLD TECHNOLOGIES. If this is not
possible, the complete detector has to be replaced or returned to
the manufacturer for repair.
When replacing the crystal-multiplier combination it may happen
that the sensitivity of the detector to Gamma radiation changes.
Therefore, check the level indication with empty and full vessel
after replacement and, if necessary, carry out a new calibration.
Dismantle the electronics module as described on page 2–222.
Pull the crystal-multiplier assembly (3) out of the socket of the
electronics (4).
Figure 4-3 Detector electronics module
Plug the new crystal-multiplier assembly into the socket. Please
observe the encoding nose.
Install the electronics module in the Uni-Probe as described on
page 2–223.
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