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LUDLUM MODEL 133 SERIES
GAMMA DETECTOR
February 2018
Serial Number PR-373191 for Model 133-2 and
Serial Number PR-372938 for the remainder of the 133 Series
and Succeeding Serial Numbers
Manual covers these model numbers:
(133-2, 133-2-1, 133-3, 133-3-1,
133-4, 133-4-1, 133-6, 133-6-1, 133-7, 133-7-1)
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Related Manuals for LUDLUM 133-4
Summarization of Contents
Operating Procedures for Gamma Detector
Connecting the Gamma Detector to an Instrument
Connect detector cable by pushing and twisting connector until latched. Repeat for the other end connected to the instrument.
Testing the Gamma Detector
Ensure correct HV setting (550V), check background reading, and verify source reading within 20% of calibration or specified efficiency.
Safety Considerations for Gamma Detectors
Environmental Conditions for Normal Use
Use indoors/outdoors in dry environments. Temp: -20 to 50°C. Humidity <95% (non-condensing). Pollution Degree 3.
Cleaning Instructions and Precautions
Clean externally with a damp cloth and water. Do not immerse. Turn off, wait one minute, disconnect cable before cleaning.
Parts List, Drawings and Diagrams
Ludlum Model 133-2 Probe Assembly Diagram
Detailed diagram illustrating the assembly of the Model 133-2 Gamma Detector probe.
Ludlum Model 133-2 Probe Assembly Details
Exploded view and components list for the Model 133-2 Gamma Detector probe assembly.
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