BERTHOLD TECHNOLOGIES LB4710-050, User Manual

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Chapter 4 Instrument Description
Mini-Switch LB 471
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4.3
Detectors
The detector converts the Gamma quanta emitted by the source
into electrical pulses and passed them on to the evaluation unit.
All components are installed together with the high voltage gener-
ation in a sturdy cylindrical stainless steel case with integrated
connection box.
Different versions are available which are selected in accordance
with physical, radiation protection or economical considerations in
the project planning phase.
4.3.1 GM Detector
Depending on the operation conditions, the GM detector is
equipped with one halogen counter tube for standard applications
or with two halogen counter tubes for special applications for short
switching times or to reduce a high source activity.
GM detectors are installed with the respective electronics including
high voltage generation and pulse amplification in a stainless steel
case.
The protection type is IP 65.
The connection is made in the integrated connection room with
two wires. The maximum cable length is 1000 m at a cable cross-
section ≥1.0 mm
2 .
Type Number of
counter tubes
Ex-protection
SZ5 GHS 3171-1Gd 1 pressure-proof casing
SZ5 GHS 3171-2Gd 2 pressure-proof casing
SZ5 GHS 3171-1Gi 1 intrinsically safe
SZ5 GHS 3171-2Gi 2 intrinsically safe
GHS 3172-1 1 no
GHS 3172-2 2 no
GM detector types