Fluke 943-27 Manual De Usuario

General Information

Application

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