LUDLUM MODEL 3 User Manual

Ludlum Measurements, Inc. April 2016
Table of Contents
Introduction 1
Getting Started 2
Unpacking and Repacking 2-1
Battery Installation 2-1
Connecting a Detector to the Instrument 2-2
Battery Test 2-2
Instrument Test 2-2
Reading the Meter Face Dial 2-3
Operational Check 2-6
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
Calibration and Maintenance 6
Calibration 6-1
Exposure Rate Calibration 6-2
CPM Calibration 6-3
Establishing an Operating Point 6-4
Maintenance 6-5
Recalibration 6-5
Batteries 6-6
Troubleshooting 7
Troubleshooting Electronics which utilize a
GM Detector or Scintillator 7-1
Troubleshooting GM Detectors 7-3
Troubleshooting Scintillators 7-4

LUDLUM MODEL 3 Specifications

General

Detector Compatibility	scintillation detectors
Power Source	Two D-cell batteries
Display	Analog meter
Audio	Built-in speaker
Operating Temperature	-20°C to 50°C (-4°F to 122°F)
Energy Range	Depends on detector
Accuracy	±10%