Fluke Biomedical 942A-200L-M4 - Manual (Page 6)

942A-200L-M4 & 942A-200L-M5 UDR
Operator Manual
1-2
Standard analog outputs of 0 to 10 VDC and 4 to 20 mA are provided for recording and computer
monitoring. The 0 to 10 VDC output may also be used to drive a remote meter.
Except for the LED Check Source Pulser, all electronics required to interface to the VICTOREEN 943
series radiation detectors are included within the 942A-200L-M4 and 942A-200L-M5 UDR’s. These
electronics consist of a high voltage power supply, low voltage detector power supply, and detector input
signal conditioning. The system also includes a detector shutdown feature on overrange to prevent
damage to the detector and to preclude the possibility of on-scale readings in very high radiation fields
due to radiation effects on the electronics.
The following paragraphs describe the available options. A separate manual, for each option, is available
with more detailed information. Listed below are the option boards currently available.
1. 942-200-75: ANALOG OPTION INPUT BOARD - Contains four separate channels for analog input.
A 0 to 10 VDC input or 4 to 20 mA input can be selected independently for each channel using the
jumpers and switches provided on the board. Possible inputs to the board include: temperature,
pressure, flow, or simulated radiation.
2. 942-200-80: COMMUNICATIONS LOOP OPTION BOARD - Designed to enable a EIA RS232C
standard communications link between VICTOREEN’s ratemeter and a user computer system or
CRT terminal, with baud rates ranging from 50 baud to 19200 baud. An asynchronous
communication interface adapter is utilized to format the data and control the interface.
The VICTOREEN communications interface also provides the necessary circuitry to allow
interconnecting to a standard VICTOREEN communication link. This interface allows multiple
UDRs to share a common six-wire cable to a main central processor unit.
3. 942-200-90: SINGLE CHANNEL ANALYZER/ AMERICIUM REGULATOR - Designed to provide
two independently adjustable windows for the discrimination of radiation pulses using the peak
voltage analysis technique. When used with an AMERICIUM -231 doped sodium iodine crystal,
provides the ability to automatically adjust the detector high voltage to compensate for
photomultiplier tube gain changes due to ambient temperature variations.
4. 942-200-90-M1 Single Channel Analyzer/Americium Regulator modified to permit SCA/ Gross
mode operation from an external switch, this option is supplied on the 942A-200L-M4 UDR.
5. 942-200-95: ANALOG OUTPUT BOARD - Designed to provide a user selectable single output
voltage of: 0 -10 VDC, 0 -5 VDC, 0 -1 VDC, 0 -500 mV DC, 0 -100 mV DC, 0 -50 mV DV, or 0-
10mVDC.
6. 942-200-95M1: DUAL ANALOG OUTPUT BOARD - Designed to provide two user selectable output
voltages. Output #1 is either 0 -5 VDC, or 0 -10 VDC, while output #2 is either 0 -10 mV DC, 0 -50
mV DC, 0 -100 mV DC, 0 -500 mV DC, or 0 -1 VDC. This option is provided on the 942A-200L-M4
UDR.
7. S168319A-119: Line Filter/Surge Suppressor Assembly - Designed to provide EMI/RFI protection
for the 942A series digital ratemeter and 943 series scintillation detectors. The assembly consists
of two (2) separate and independent line conditioning circuits that provide filtered AC power to each
942A series ratemeter. The S168319A-119 is designed to mount in the center section of the 948B-
1A-5 rack Chassis, to provide EMI/RFI protection for two (2) 942A series digital ratemeters. The
major active components of the S168319A-119 are two (2), 960SS-200 Surge suppressor circuit
boards, two (2), 92-9015-A Line Filters, and two (2) 14-235 ferrite cubes. The S168319A-119 also
contains AC line and neutral fuses to protect the internal circuitry from over voltage conditions.
8. 942A-200SS: Line Filter/Surge Suppressor Assembly - Designed to provide EMI/RFI protection for
the 942A series digital ratemeter and 943 series scintillation detectors. The assembly consists of
two (2) separate and independent line conditioning circuits that provide filtered AC power to each
942A series ratemeter. The 942A-200SS is designed to mount in the center section of the 948A-1
rack Chassis, to provide EMI/RFI protection for two (2) 942A series digital ratemeters. The major
active components of the 942A-200SS are two (2), 960SS-200 Surge suppressor circuit boards,
two (2), 92-9015-A Line Filters, and two (2) 14-235 ferrite cubes. The 942A-200SS also contains
AC line and neutral fuses to protect the internal circuitry from over voltage conditions.