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Summary of Contents for Ludlum Measurements 182
- Page 1 LUDLUM MODEL 182 RADON FLASK COUNTER June 2011 Serial Number PR206794 and Succeeding Serial Numbers...
- Page 2 LUDLUM MODEL 182 RADON FLASK COUNTER June 2011 Serial Number PR206794 and Succeeding Serial Numbers LUDLUM MEASUREMENTS, INC. 501 OAK STREET, P.O. BOX 810 SWEETWATER, TEXAS 79556 325-235-5494, FAX: 325-235-4672...
- Page 3 RETURN OF GOODS TO MANUFACTURER If equipment needs to be returned to Ludlum Measurements, Inc. for repair or calibration, please send to the address below. All shipments should include documentation containing return shipping address, customer name, telephone number, description of service requested, and all other necessary information.
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Page 4: Table Of Contents
Model 182 Radon Flask Counter Table of Contents Introduction Operation Specifications Safety Considerations Recycling Calibration and Maintenance Troubleshooting Parts List Drawings Ludlum Measurements, Inc. December 2007... - Page 5 Model 182 Radon Flask Counter Model 182 Radon Flask Counter – open Ludlum Measurements, Inc. June 2011...
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Page 6: Introduction
Model 182 Radon Flask Counter Introduction he Model 182 Radon Flask Counter is a light-tight sample box that uses scintillation techniques for the detection of radiation material. It consists of a light- tight cylindrical well, a two-inch photomultiplier tube (PMT) optically coupled to a light pipe, and an automatic high voltage ON-OFF switch. -
Page 7: Specifications
Model 182 Radon Flask Counter scintillation material on top of the plexiglass. The plexiglass should be checked for cleanliness and cleaned, if necessary, prior to using the Flask Counter. Place the radiation source on top of the scintillation material. Fasten cover to main body by tightening the thumbscrews and record data. -
Page 8: Safety Considerations
LEANING AND AINTENANCE RECAUTIONS The Model 182 may be cleaned externally with a damp cloth, using only water as the wetting agent. Do not immerse the detector in any liquid. Observe the following precautions when cleaning or performing maintenance on the detector: Disconnect the detector from the instrument. -
Page 9: Recycling
To this end, Ludlum Measurements, Inc. strives to supply the consumer of its goods with information regarding reuse and recycling of the many different types of materials used in its products. With many different agencies – public and private –... -
Page 10: Calibration And Maintenance
• HV Range: 500-1200 V; nominally 1100 V • Input Sensitivity: 2-500 mV; nominally 10 mV Place the top cover on the Model 182. Push the top cover down. Tighten the thumbscrews to lock the top cover in place. The push rod on the side of the detector should trip the microswitch, providing HV to the photomultiplier tube. - Page 11 Model 182 Radon Flask Counter Plateau the instrument, starting at 500 volts. Increase voltage in 50-volt increments up to the voltage previously determined (10 cpm or greater background count reached). Determine the HV starting point. From the data, select HV where background is equal to or less than 2 cpm above the knee of the plateau.
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Page 12: Troubleshooting
Symptom Possible Cause Zero counts: Model 182 not connected to counting instrument HV push rod not properly adjusted Cable malfunction Broken HV of signal wire... - Page 13 Model 182 Radon Flask Counter Excessive Background Count On Plateau A. Expected Background Count 3 counts per 10 minutes or less with scintillation material B. Excessive: Light leak Cable malfunction Microswitch malfunction PMT noisy Instrument contaminated Page 8 June 2011...
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Page 14: Parts List
Model 182 Radon Flask Counter Parts List Part Number Description Quantity 47-1633 Model 182 Radon Flask Counter 01-5042 2-inch Photomultiplier Tube 40-4040 Model 182 2-inch Socket Board 08-6538 Microswitch 18-8779 Terminal Strip (4 Pin) 10-7028 1 Megohm, ¼W Resistor 21-9353 Signal Coax-RG178/U 10 in. -
Page 15: Drawings
Model 182 Radon Flask Counter Drawings Model 182 Assembly View, Drawing 90 x 16 Model 182 2-inch Socket, Drawing 2 x 180 Page 10 June 2011 Ludlum Measurements, Inc. - Page 16 Model 182 Radon Flask Counter June 2011 Ludlum Measurements, Inc. Page 11...
- Page 17 Model 182 Radon Flask Counter June 2011 Ludlum Measurements, Inc. Page 12...
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