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9140
Fluke 9140 User Manual
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9140
Dry-well
Calibrator
User’
s
Guide
Rev. 5B1702
Hart
Scientific
2
Table of Contents
Default Chapter
3
Table of Contents
3
1 Before You Start
8
Symbols Used
8
Safety Information
9
Warnings
9
Cautions
11
Authorized Service Centers
12
2 Introduction
14
3 Specifications and Environmental Conditions
15
Specifications
15
Environmental Conditions
15
Warranty
16
4 Quick Start
17
Unpacking
17
Set-Up
17
Power
17
Setting the Temperature
18
5 Parts and Controls
19
Rear Panel
19
Figure 1 9140 Back Panel
19
Front Panel
20
Figure 2 9140 Front Panel
20
Constant Temperature Block Assembly
21
Constant Temperature Block
21
Probe Sleeves and Tongs
21
Figure 3 Inserts Available for the 9140 Block Assembly
21
6 General Operation
23
Calibrator Set-Up
23
Changing Display Units
23
Switching to 230 V Operation
23
Setting the Temperature
24
Calibrating Probes
24
7 Controller Operation
26
Well Temperature
26
Temperature Set-Point
26
Programmable Set-Points
26
Figure 4 Controller Operation Flowchart
27
Set-Point Value
28
Temperature Scale Units
28
Scan
29
Scan Control
29
Scan Rate
29
Temperature Display Hold
30
Hold Temperature Display
30
Mode Setting
30
Switch Wiring
30
Switch Test Example
31
Secondary Menu
31
Heater Power
31
Proportional Band
32
Figure 5 Well Temperature Fluctuation at Various Proportional Band Settings
32
Controller Configuration
34
Calibration Parameters
34
Alpha
35
Delta
35
Operating Parameters
35
Serial Interface Parameters
35
Baud Rate
35
Sample Period
35
Sample Period
36
Duplex Mode
36
Linefeed
37
8 Digital Communication Interface
38
Serial Communications
38
Wiring
38
Setup
38
Figure 6 Serial Cable Wiring
38
Baud Rate
39
Duplex Mode
39
Linefeed
39
Sample Period
39
Serial Operation
39
Interface Commands
40
9 Test Probe Calibration
43
Comparison Methods
43
Calibrating a Single Probe
43
Comparison Calibration
43
Calibration of Multiple Probes
44
Dry-Well Characteristics
44
Vertical Gradient
44
Heating and Cooling Rates
44
Stabilization and Accuracy
45
Figure 7 Typical Heating Rate
45
Figure 8 Typical Cooling Rate
45
10 Calibration Procedure
47
Calibration Points
47
Compute DELTA
47
Compute R & ALPHA
48
Accuracy & Repeatability
49
11 Maintenance
50
12 Troubleshooting
51
Troubleshooting Problems, Possible Causes, and Solutions
51
CE Comments
52
EMC Directive
52
Low Voltage Directive (Safety)
52
4
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Fluke 9140 Specifications
General
Stability
±0.01 °C
Well Diameter
25 mm
Display
LCD
Communication Interface
RS-232
Resolution
0.1 °C
Power Supply
AC mains
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