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RO-20
Thermo Scientific RO-20 User Manual
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Operating Manual
RF-000-xxxxxx
RO-20 AA Ion Chamber
2
Table of Contents
Default Chapter
4
Table of Contents
4
1 Introduction
7
Instrument Description
7
Figure 1-1: Model RO-20 Ion Chamber
7
Measuring Units
8
Detector Specifications
8
Size
8
Fill
8
Wall
8
Window
8
Beta Shield
8
Radiation Detected
8
Photon Energy Response
8
Examples of Beta Response
9
Fast Neutron Response (Pube)
9
Figure 1-2: Nominal Photon Energy Response
9
General Specifications
10
Ranges Five Linear Ranges
10
Meter
10
Response Time
10
Linearity
10
Controls
10
External
10
Internal
11
Batteries
11
Environment
11
Temperature
11
Temperature Compensation
11
Moisture
11
Humidity
11
Weight
12
Size
12
2 Operation
13
Description of Controls
13
Function Switch
13
Zero Knob
13
Light Switch
13
Calibration Controls (Internal)
13
Using the Instrument
13
Operation the Instrument
14
Checking the Zero Setting
14
Minimizing Deflection
14
Ion Chamber
14
Radiation Overexposure
14
Electronic Circuitry
14
3 Theory of Operation
17
General Theory
17
Functional Theory
18
Ion Chamber
18
Figure 3-2: Basic Operation of the Circuit
18
The Circuit
19
Figure 3-3: Detector Board Component Layout
19
Figure 3-4: Main Circuit Board Layout
20
4 Maintenance
23
Preventive Maintenance
23
Batteries
23
Desiccant
24
Calibration
24
Circuit Checks
25
Disassembly
25
Reassembly
27
Troubleshooting
29
Figure 4-2: General Schematic
31
5 Appendix A - Electronics and Parts List
33
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Thermo Scientific RO-20 Specifications
General
Brand
Thermo Scientific
Model
RO-20
Category
Measuring Instruments
Language
English
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