Model 956A-201-S1
Universal Digital Ratemeter Simulator
March 2005
Manual No. 956A-201-S1-1 Rev. 1
©2003, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
Operators Manual
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
Table of Contents
Section 1: General Information................................................................................... 1-1
1.1 Introduction .................................................................................................. 1-1
1.2 Equipment Overview.................................................................................... 1-1
1.3 Universal Digital Ratemeter Simulator 956A-201-S1 ................................... 1-1
1.4 Rack Chassis 948B-1-5 ............................................................................... 1-2
1.5 Action Pak S14283A101 .............................................................................. 1-2
1.6 Recommended Spare Parts......................................................................... 1-2
Section 2: Receiving Inspection and Storage ........................................................... 2-1
2.1 Receiving Inspection.................................................................................... 2-1
2.2 Storage ........................................................................................................ 2-1
Section 3: Installation.................................................................................................. 3-1
3.1 Installation.................................................................................................... 3-1
3.2 Start-up........................................................................................................ 3-2
3.3 Shutdown..................................................................................................... 3-2
Section 4: Operation.................................................................................................... 4-1
4.1 Operation ..................................................................................................... 4-1
Section 5: Maintenance and Calibration .................................................................... 5-1
5.1 Maintenance ................................................................................................ 5-1
5.2 Calibration – Simulator Display.................................................................... 5-1
Appendix A: Applicable Drawings and Bill of Materials ...............................................A-1
A.1 Drawings...................................................................................................... A-1
A.2 Bill of Material .............................................................................................. A-1
Appendix B: Modification Procedure and Data............................................................. B-1
B.1 Modification Procedure and Data................................................................. B-1
Appendix C: Test Procedure - Factory...........................................................................C-1
C.1 Test Procedure - Factory ............................................................................. C-1
Appendix D: Standard Manuals ......................................................................................D-1
D.1 Standard Manuals........................................................................................ D-1
Appendix E: Vendor Data................................................................................................ E-1
E.1 Vendor Data................................................................................................. E-1
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General Information
Introduction
1
Section 1
General Information
1.1 Introduction
The equipment described in this manual is designed for use at the Simulator Facility of Rochester Gas
and Electric’s Ginna Nuclear Power Station. The simulator equipment provided mimics the redundant
Control Room Air Intake Monitors identified as channels R45 and R46. These channels provide a
continuous display of gamma radiation dose rate in the intake duct. The displayed units are mR/h.
The equipment comprising the simulator channels is listed below:
• Model 956A-201-S1, Universal Digital Ratemeter Simulator
• Model 948B-1-5 Rack Chassis, dual bay
• Model S14283A101, Action Pak, 4010 series
The 956A-201-S1 and 948B-1-5 are designed by Fluke Biomedical, Radiation Management Services. The
S14283A101 is designed by Action Instruments.
1.2 Equipment Overview
This section is a brief overview of each piece of equipment utilized for each of the two simulator channels.
A description of the equipment is contained in the following paragraphs. For further information on
individual pieces of equipment, refer to the Standard Manual located in Appendix D.
1.3 Universal Digital Ratemeter Simulator 956A-201-S1
The model 956A-201-S1 is voltage or current driven device used to simulator the display and alarm
function of the 956A-201 Ratemeter. The display range is five decades over a range of 1.0E-2 to 1.0E5
mR/h. The R45 and R46 monitors operate over a range of 1.0E-2 to 1.0E3 mR/h. Standard features
include a floating decimal point display in mR/h, R/h or kR/h, a multicolor bargraph indicating channel
status and dose rate, front panel pushbuttons for alarm setpoint display, alarm acknowledgement, check
source and AC power. Unpower (dry) 5A relay contacts are provide for Fail, Warn and High radiation
alarms. A powered contact is provided by the Check Source relay. All relays except Check Source are
operated in the normally energized or “fail safe” mode.
The 956A-201-S1 is configured to operate with a 0-10 VDC input processed through the installed model
942-200-75 Analog Input Option circuit board. The 0 –10 VDC input voltage provides 255 steps over the
selected range.
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Model 956A-201-S1
Operators Manual
1.4 Rack Chassis 948B-1-5
The 948B-1-5 Rack Chassis is a two channel, 19” width chassis provided with front and rear attachment
points for standard EIA mounting. The physical dimensions of the 948B-1-5 are provided in Appendix A.
1.5 Action Pak S14283A101
The S14283A101 is a factory configured signal converter/isolator powered by 120 VAC. The device
installs in a standard surface mount octal relay socket (provided) and converts a bipolar –10 to +10 VDC
input signal to a 0-10 VDC output. The S14283A101 is the interface between the Simulator’s computer
driven output and the 956A-201-S1 UDR Simulator input.
1.6 Recommended Spare Parts
Part Number Description Qty.
92-7027-1A Fuse, 2A, 3AG 5
1-2
Receiving Inspection and Storage
Receiving Inspection
Section 2
Receiving Inspection and Storage
2.1 Receiving Inspection
Upon receipt of the unit:
1. Inspect the carton(s) and contents for damage. If damage is evident, file a claim with the carrier
and notify Fluke Biomedical, Radiation Management Services at 440.248.9300.
2. Check that all items on the packing slip are present and in good condition. If any items are missing
or damaged, contact Fluke Biomedical at 440.248.9300.
2.2 Storage
Instruments storage must comply with Level B storage requirements as outlined in ANSI N45.2.2 (1972)
Section 6.1.2(.2). The storage area shall comply with ANSI N45.2.2 (1972) Section 6.2 Storage Area,
Paragraphs 6.2.1 through 6.2.5. Housekeeping shall conform to ANSI N45.2.3 (1972).
2
Level B components shall be stored within a fire resistant, tear resistant, weather tight enclosure, in a
well-ventilated building or equivalent.
Instruments storage must comply with the following:
1. Inspection and examination of items in storage must be in accordance with ANSI N45.2.2 (1972)
Section 6.4.1.
2. Requirements for proper storage must be documented and written procedures or instructions must
be established.
3. In the event of fire, post-fire evaluation must be in accordance with ANSI N45.2.2 (1972), Section
6.4.3.
4. Removal of items from storage must be in accordance with ANSI N45.2.2 (1972), Sections 6.5 and
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Installation
Installation
3
Section 3
Installation
3.1 Installation
Installation consists of mounting the 948B-1-5 Rack Chassis and the installation and termination of
electrical connections to the 956A-201-S1 UDR Simulator and S14283A101 Action Pak signal converter.
Refer to the standard manuals in Appendix D for connector assembly instructions and Loop Diagram
S157033A-106 in Appendix A for electrical termination. Prior to connecting terminated cabling to the UDR
Simulator or applying AC power, perform a point-to-point wiring verification per Loop Diagram S157033A-
106.
The 948B-1-5 Rack Chassis is designed to be installed in a cabinet equipped with standard EIA mounting
frames or surface mounted through a solid panel of sufficient gauge to allow for tapping of the 10-32
mounting holes. It is recommended that the rear of the rack chassis also be supported. The 948B-1-5
Rack Chassis is supplied with mounting hardware consisting of #10-32 oval head screws and nylon
washers with dress covers. Other equivalent mounting hardware may be used at the discretion of the
Customer.
Customer 120 VAC, 60 Hz power is connected to J3 of the 956A-201-S1 UDR Simulator and to terminals
1 through 3 of the S14283A101 signal converter. The nominal power requirements for UDR Simulator and
signal converter are 30 watts per channel.
Customer signal connections are made at J6 of the UDR simulator, signal converter terminals 5 and 6
(input) and signal converter terminals 7 and 8 (output) Relay contacts are available on UDR Simulator P1.
Shielded, twisted pair 22-20 gauge cable is recommended for signal wiring. Refer to Loop Diagram
S157003A-106 for details.
A full complement of mating connectors is provided with the 956A-201-S1 UDR Simulator but not all of
these will be required for installation. A pin extraction tool must be used when removing pins from the
AMP connector used for AC power input. The P6 signal input plug for J6 is a 26 pin, solder type
connector. It is recommended that heat shrinkable or other insulating tubing be used on the P6
connections after soldering due to the close spacing of the pins. Tool # 305183 is provided as part of the
connector kit.
Connection to the S14283A101 signal converter should be made using insulated barrel crimp type, 22-18
AWG lugs suitable for a #6 to #8 screw.
When terminating UDR Simulator rear panel cables, allow sufficient service loops in these cables to allow
the UDR Simulator to be withdrawn from the front of the rack chassis for cable disconnection.
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Model 956A-201-S1
Operators Manual
3.2 Start – Up
NOTE
Before apply AC power to the UDR Simulator, read
the operation section of the 955A Standard Manual
located in Appendix D.
1. After the equipment has been installed and all pre-power tests have, apply power by depressing
and releasing the front panel AC power switch on the UDR Simulator and energize the signal
isolator by applying AC power.
2. Enter or verify the setpoints listed in the Table below and record. Setpoints are entered by placing
the rotary function switch in the desired number position corresponding to the setpoint and
depressing the “ENTER” pushbutton to display the current value. If the setpoint value is correct,
depress the “ENTER” pushbutton a second time to accept the value, then move the rotary function
switch to the next desired position. If the setpoint value is to be change, use the “VAUE” and
“DIGIT” pushbuttons to edit the value, then depress “ENTER” to accept. Note that the “VALUE”
pushbutton is used to alter the “E” or exponent to “-“ or negative when a value less than one is
required.
Rotary Function
Switch Position
0 High Radiation Alarm in mR/h Customer Select 1.00E3
1 Warn Radiation Alarm in mR/h Customer Select 1.00E1
2 * Dead Time (Tau) 0.00E0 0.00E0
3 Analog Output F.S. in mR/h 1.00E3 1.00E6
4 Over Range in mR/h 1.00E3 1.00E6
5 Conversion Constant 6.25-1 1.00E1
6 Not Used 0.00E0 0.00E0
7 Analog Output L.S. in mR/h 1.00-2 1.00-2
8 * Count Time in Calibrate Mode 6.00E1 6.00E1
9 Under Range in mR/h 1.00-2 1.00-2
* These parameters are normally not altered from default values in the UDR Simulator application.
Setpoint
Normal Value
R45/46 Sim.
Default Value
(EPROM)
3.3 Shutdown
Shutdown of the simulator channel is accomplished by depressing and releasing the UDR Simulator front
panel AC power pushbutton and de-energizing the signal isolator power source.
3-2
Operation
Operation
4
Section 4
Operation
4.1 Operation
The UDR Simulator displays an mR/h value based on input voltage. Alarms and analog outputs operate
as they would in a normal, area radiation-monitoring channel. High and Alert alarms are factory
configured to require manual, or operator, reset. If automatic reset of the High and Alert alarms is desired,
configuration jumper JP3-3 must be removed. The Table below shows the expected UDR Simulator
radiation display values for input voltages based on a conversion constant of 6.25-1.
Signal Converter
Input
-10 VDC 0 VDC 0.01 mR/h nominal
- 6 VDC 2 VDC 0.10 mR/h
- 2 VDC 4 VDC 1.0 mR/h
+2 VDC 6 VDC 10 mR/h
+6 VDC 8 VDC 0.10 R/h
+10 VDC 10 VDC 1.0R/hr to EEEEE *
* Over range is 1.00E3 mR/h
Fine span adjustment of the UDR Simulator display is accomplished through potentiometer R1 on the
942-200-75 Analog Input Option circuit card. The Signal Isolator is also provided with zero and span
adjustment potentiometers.
Refer to the 955A Standard Manual for UDR display features, alarm function/logic and operator
interfaces.
Signal Converter Output/ UDR Input UDR Simulator Display
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Maintenance and Calibration
Maintenance
5
Section 5
Maintenance and Calibration
5.1 Maintenance
The UDR Simulator and signal converter are designed to operate for extended periods without scheduled
maintenance. Yearly inspections of the UDR Simulator rear panel cable pigtails for chaffing is
recommended.
The 948B-1-5 Rack Chassis should be periodically inspected for dust build-up on the ventilation screens.
Adjust the frequency of cleaning as required to maintain good convection airflow through the chassis.
5.2 Calibration – Simulator Display
Calibration of the S14283A101 signal isolator is limited to the adjustment of the zero and span
potentiometers. Refer to the Table in Section 4 for input vs. output voltages.
Calibration of the display of UDR Simulator is limited to the adjustment of span on the 942-200-75 Analog
Input Option circuit card.
For additional calibration adjustments generic to the 956 series Ratemeter, refer to the 955A Standard
Manual. Features covered include analog current loop output and voltage output zero and span. These
features may or may not be required for simulator use.
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Applicable Drawings and Bill of Materials
Applicable Drawings and Bill of Materials
A.1 Drawings
Drawing Number Description
S157033A-106 Loop Diagram, Simulator
948B-1-5 Rack Chassis, Dual
A.2 Bill of Material
Document Number Description
956A-201-S1 UDR Simulator
Appendix A
A
Appendix A
948B-1-5 Rack Chassis, Dual
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Model 956A-201-S1
Operators Manual
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Modification Procedure and Data
Modification Procedure and Data
B.1 Modification Procedure and Data
Document Number Description
956A-201-S1MS Modification Sheet, UDR Simulator
Appendix
B
Appendix B
B-1
Model 956A-201-S1
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Test Procedure-Factory
Test Procedure - Factory
C.1 Test Procedure - Factory
Document Number Description
TP956A-201-3 Electronic Factory test Procedure for Ratemeter
Appendix
C
Appendix C
C-1
Model 956A-201-S1
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Standard Manuals
Standard Manuals
D.1 Standard Manuals
Document Number Description
955A-1 Standard Manual for 956A-201 series Ratemeters
942-100-75D Standard Manual for Analog Input Option
956A-201-M1MS Modification Sheet for Model 956A-201
Appendix
D
Appendix D
D-1
Model 956A-201-S1
Operators Manual
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E.1 Vendor Data
Document Number
S14283A101 AP4010 Signal Converter
Description
Appendix
Vendor Data
E
Appendix E
Vendor Data
E-1
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
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