
Technical Manual
1-10 Welch-Allyn, Inc.
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SureTemp
1
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Technical Manual
1
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TABLE OF CONTENTS
3
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LIST OF FIGURES
5
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WARRANTY
6
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SPECIFICATIONS
7
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TERMINOLOGY
8
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Basic System Description
9
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1-2 Welch-Allyn, Inc
10
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Self Tests
11
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Battery Life
12
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Normal Mode
13
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Monitor Mode
14
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Biotech Mode
15
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1-8 Welch-Allyn, Inc
16
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Operational Characteristics
17
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Model 678/SureTemp
17
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Model 679 1-9
17
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1-10 Welch-Allyn, Inc
18
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2. PREVENTIVE MAINTENANCE
19
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2-2 Welch-Allyn, Inc
20
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3. CALIBRATION TESTING
21
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3-2 Welch-Allyn, Inc
22
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4. THEORY OF OPERATION
23
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Probe Switch
24
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Power Supply
25
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4-4 Welch-Allyn, Inc
26
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Rthermistor
27
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()PWthermistor ( )Rhical
27
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Probe Identification Logic
28
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Theory of Operation
29
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Model 679 4-7
29
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Other Components
30
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Model 679 4-9
31
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4-10 Welch-Allyn, Inc
32
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5. TROUBLESHOOTING
33
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Equipment Required
34
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Troubleshooting Table
35
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5-4 Welch-Allyn, Inc
36
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70898-0000A
36
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Troubleshooting
37
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Model 679 5-5
37
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5-6 Welch-Allyn, Inc
38
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Model 679 5-7
39
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Field Serviceable Repairs
40
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Field Serviceable Parts
40
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Model 679 5-9
41
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5-10 Welch-Allyn, Inc
42
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Model 679 5-11
43
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Thermometer Disassembly
44
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Model 679 5-13
45
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Figure 8 - Main PCA
46
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Model 679 5-15
47
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WELCH ALLYN
48
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5-16 Welch-Allyn, Inc
49
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