Fluke 940-513 User Manual
Off-Line Sampler
Model 940-513,
11cc Volume
Installation and Operation Manual
April, 2006, P/N 940-513-1, Rev. 2
©2006 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
Model 940-513
Operators Manual
Table of Contents
Section 1: General Information................................................................................... 1-1
1.1 Product Description................................................................................................................ 1-1
1.2 Specifications ......................................................................................................................... 1-1
1.3 Features and Benefits............................................................................................................ 1-3
1.4 Safety Precautions and Terms............................................................................................... 1-3
1.5 Product Handling and Storage............................................................................................... 1-4
1.6 Accessories............................................................................................................................ 1-4
1.7 Customer Service/Technical Assistance................................................................................ 1-5
1.8 Manual Addenda.................................................................................................................... 1-5
Section 2: Theory of Operation................................................................................ 2-1
2.1 Functional Description............................................................................................................ 2-1
Section 3: Operation.................................................................................................... 3-1
3.1 Installation ............................................................................................................................. 3-1
3.2 Operator Interface Functions ................................................................................................. 3-2
3.3 Accessories............................................................................................................................ 3-2
3.4 Preoperational Checks........................................................................................................... 3-2
Section 4: Maintenance and Calibration .................................................................... 4-1
4.1 Maintenance........................................................................................................................... 4-1
4.2 Calibration .............................................................................................................................. 4-1
Section 5: Troubleshooting ........................................................................................ 5-1
5.1 Troubleshooting ..................................................................................................................... 5-1
5.2 Start-up Test .......................................................................................................................... 5-1
5.3 Periodic Manual Test ............................................................................................................. 5-1
5.4 Recommended Spare Parts................................................................................................... 5-1
5.5 Return Authorization .............................................................................................................. 5-2
Appendix A: Applicable Drawings..................................................................................A-1
A.1 Applicable Drawings...............................................................................................................A-1
Appendix B: Bill of Materials .......................................................................................... B-1
B.1 Bill of Materials.......................................................................................................................B-1
Appendix C: Cable Termination Instructions ................................................................C-1
C.1 Cable Termination Instructions ....................................................................C-1
Appendix D: Supplemental Data (Customer Specific)..................................................D-1
D.1 Supplemental Data (Customer Specific)...................................................... D-1
Model 940-513
Operators Manual
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Model 940-513
Operators Manual
Section 1
General Information
1.1 Product Description
This manual outlines the procedures required for installation, operation and maintenance of the Model
940-515 Off-Line Sampler. The Model 940-513 is an off-line, single channel sampler suitable for
monitoring accident range radioactive gases. The sampler is only used with the Model 943-27-31
Current Mode Beta Scintillation Detector and radioactive check source part number 841A-123-50. The
Model 943-27-31 detector and 841A-123-50 check source are described in separate manuals. Refer to
Figure 1-1 for a general view of the sampler and Appendix A for assembly and dimensional drawings.
The sampler consists of a weldment, a detector end cap and a Gas chamber end cap. The sampler
weldment provides three (3) inches of 4 pi lead shielding around a sensitive volume and provides
inlet/outlet connections to the ample volume. Tube stubs with a ¼ inch OD are provided for connecting
the sample volume to other sampling system components (e.g. a vacuum pump, inlet filters, isolation
valves, etc.).
The detector end cap provides a means to remove and install the detector and to shield the rear of the
detector from ambient background radiation.
The Gas chamber cap provides access to the sample volume for cleaning and shields the sample volume
from ambient background radiation. The Gas chamber cap also houses the solenoid assembly used to
position a radioactive check source in view of the beta sensitive scintillation detector. The radioactive
check source available is a 100 microCurie Strontium 90 source capsule.
The Gas chamber plug is attached to the Gas chamber cap. The Gas chamber plug provides a pressure
tight seal (10 psig) for the sample volume and provided access to the sample volume for cleaning or
decontamination.
1.2 Specifications:
The following technical specifications apply to the Model 940-513 Sampler:
Dimensions ( H x W x L):
Weight: Approximately 500 lbs (227 kg)
Shielding: 4 pi, 3 in Lead
Inlet Diameter: ¼ inch O.D. Stn Stl tubing
Outlet Diameter: ¼ inch O.D. Stn Stl tubing
Effective Chamber Volume: Approximately 11cc
Pressure Limit: 10 psig
High Voltage Cable: Detector High Voltage cable exits the detector cap
Signal Voltage Cable: Detector Signal Voltage cable exits the detector cap
Check Source: A 100 microCurie, Sr-90 source and rotary solenoid are
11.5 x 11.5 x 21 inches
(29.2 x 29.2 x 53.3 cm)
assembly for termination at the detector preamplifier
assembly for termination at the detector preamplifier
located in the Gas chamber cap. Entry for the solenoid
control wiring is provided via a ½ in NPT threaded port
in the gas chamber cap.
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Operators Manual
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Operators Manual
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Operators Manual
1.3 Features and Benefits
The Model 940-513 Series Sampler, provides the following features:
• Measurement of accident range noble gasses
• Integral Sr-90 Check Source
• Quad-lobed O-ring sealed detector
• O-ring sealed sample chamber
The design of the Model 1060AM-NM3-XX Controller provides the following User benefits:
• 4 pi shielded sample volume
• 3 inches of lead shielding
• Removable end caps for cleaning
• Rotary Check Source mechanism to minimize background contribution
1.4 Safety Precautions and Terms
The Model 940-513 sampler includes a rotary solenoid inside of the Gas Chamber cap, and voltages up
to 125 VDC may be present when the solenoid is actuated. Turn OFF the AC power on the associated
Local Control unit prior to removing the Gas Chamber Cap.
Model 940-513 sampler also includes a 100 microCurie Sr-90 radioactive source located within the Gas
Chamber Cap. The local plant Health Physist should be consulted prior to removing the Gas Chamber
cap.
The Model 940-513 is an accident noble gas monitor, and radioactive gasses may be present within the
sample volume. The local plant Health Physist should be consulted prior to removing the Gas Chamber
cap or Detector End cap to access the sample volume.
CAUTION
CAUTION
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