Section 10 Technical Data
87
Detector code in () can be used to reduce the back-
ground. Any change in the detector code requires a
new calibration.
LB 54X1 : Scintillation counter with NaI (Tl) crystal 25/25, 40/35
or 50/50.
Stability : ± 0,1 %
without Ex
Type Crystal size
mm
Weight
kg
Detector
code
LB 5421-02 40/35 18 0
LB 5401-03 50/50 18 0
LB 5481-06 44/5 4 (1) 7*
* Detector code 7, valid from detector software 1.02
(delivery date Feb. 2000)
Protection type: IP 65.
Housing: Stainless steel housing.
Cable entry: M16 for external cable diameter 7...11 mm.
Scintillators: NaI (Tl) crystal
Size: 25*25mm, 50*50mm, 40*35mm, 44*5 mm.
Stability : ± 0,1 %
Photomultiplier: EMI
HV generation: Voltage range control 500 V to 1500 V
Counter: Rate max. 524 000 CPS
Temp. measurement: via NTC, accuracy: ±3°C
Operating temp.: - 40 to + 60°C. For point detectors
- 40 to + 55°C. For point detectors
A water cooling device is available for higher tempera-
tures.
Monitoring of detector temperature and alarm when
exceeding the max. permissible temperature.
Storage temp.: -50 to + 70°C for point detectors
-50 to + 55°C for rod detectors
Input voltage: +11 to16 V DC
Power consumption: Typically 60 mA Max. 90 mA
Feed voltage: Typically 13.6 to 14.1 V
Housing sealing: IP65
Screwed cable gland: M16, external cable diameter: 6 to 10 mm
Cable e.g. 2 * 1 square, outside: 6.3 mm (Ölflex 110 blue)
Cable resistance, 2-wire: 39 Ohm/km
or
2 * 1.5 square: 26,6 Ohm/km
2 * 2.5 square: 16 Ohm/km
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