Ludlum Measurements, Inc. February 2012
Table of Contents
Introduction 1
Getting Started 2
Unpacking and Repacking 2-1
Battery Installation 2-1
Operational Check 2-2
Maintenance 2-3
Recalibration 2-3
Batteries 2-3
Specifications 3
Identification of Controls and Functions 4
Safety Considerations 5
Environmental Conditions for Normal Use 5-1
Warning Markings and Symbols 5-1
Cleaning and Maintenance Precautions 5-2
Troubleshooting 6
Troubleshooting Electronics which utilize a Scintillation Detector 6-1
Technical Theory of Operation 7
Detector 7-1
Input 7-1
Amplifier 7-1
Discriminator 7-1
Audio 7-2
Scale Ranging 7-2
Digital Analog Converter 7-2
Meter Drive 7-2
Fast/Slow Time Constant 7-2
Low Voltage Supply 7-2
High Voltage Test 7-2
High Voltage Supply 7-3
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