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Application
1
1-3
Table 1-2. General Specifications for the 943-227-15 Digital Preamplifier
Feature: Specification:
Preamplifier Power
+ 15 v @ 20 mA
Preamplifier Input
DC current, 1E-12 to 1E-3 amperes from 943-27 Current Mode Beta
Scintillation detector
Preamplifier Output
943-227-15, RS232C;
943-227-15VL, Modified RS232C serial data for transmission distances up
to 5,280 feet.
Electronic Accuracy
± 10% of the input current
Response Time
Decade / Time:
1 / 80 sec
2 / 32 sec
3 / 16 sec
4 / 4 sec
5 / 2 sec
6 / 0.9 sec
7 / 0.2 sec
8 / 0.2 sec
Dimensions
(H x W x D)
943-227-15 or 943-227-15VL:
8.0 in. x10.0 in. x 4.0 in.
(20.3 cm x 25.4 cm x 10.2 cm)
943-227-15-M1 or 943-227-15VL-M1:
8.0 in. x10.0 in. x 6.0 in.
(20.3 cm x 25.4 cm x 15.2 cm)
Weight
Approximately 8 lbs. (3.6 kg)
Housing
Gasketed, NEMA 4, Steel enclosure with hinged cover
Operating Temperature
32 °F to 122 °F
0 °C to + 50 °C
Relative Humidity
0 to 99 % non-condensing
Compatible Detectors
Victoreen 943-27 Current Mode Beta scintillation detector only
Detector Interface
Detector cables enter thru “Seal Grip” fittings; Mating SHV receptacle
provided for HV; Mating BNC receptacle provided for Signal
Cable Requirements
Victoreen Loop Communications: 6 conductors, 18 AWG (2, TwPr, 2 Single
conductor) with overall shield. For max transmission distance, 16 AWG is
recommended;
RS232C communications: 8 Conductors, 18 AWG (4 TwPr) with overall
shield.
Modification
Information
For the Model 943-227-15VL-M1, refer to Modification description provided
in Appendix E