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2430
Keithley 2430 User Manual
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Routine Maintenance 3-3
NOTE
If the power line fuse continues to blow, a
circuit malfunction exists and must be
corrected. Refer to the troubleshooting section of this manual for additional
information.
Table 3-1
Power line fuse
Line voltage
Rating
Keithley part no.
100-240V
250V, 3.15A, Slow
Blow 5
×
20mm
FU-106-3.15
58
60
Table of Contents
Default Chapter
9
Table of Contents
9
Performance Verification
17
Introduction
18
Verification Test Requirements
18
Environmental Conditions
18
Warm-Up Period
18
Line Power
19
Recommended Test Equipment
19
1Ω Resistor Characterization
20
Verification Limits
20
Example Limits Calculation
20
Resistance Limits Calculation
20
Restoring Factory Defaults
21
Performing the Verification Test Procedures
21
Test Summary
21
Test Considerations
21
Setting the Source Range and Output Value
22
Setting the Measurement Range
22
Compliance Considerations
23
Compliance Limits
23
Types of Compliance
23
Maximum Compliance Values
23
Determining Compliance Limit
24
Taking the Sourcemeter out of Compliance
24
Output Voltage Accuracy
24
Voltage Measurement Accuracy
25
Output Current Accuracy
26
Figure 1-2 Connections for 10Μa to 1A Range Current Verification Tests
27
Figure 1-3 Connections for 3A Range Current Verification Tests
28
Current Measurement Accuracy
29
Resistance Measurement Accuracy
30
Figure 1-4 Connections for Resistance Accuracy Verification
31
Table 1-7 Ohms Measurement Accuracy Limits
32
Calibration
33
Introduction
34
Environmental Conditions
34
Temperature and Relative Humidity
34
Warm-Up Period
34
Line Power
34
Calibration Considerations
34
Calibration Cycle
35
Recommended Calibration Equipment
35
1Ω Resistor Characterization
36
Unlocking Calibration
36
Unlocking Calibration from the Front Panel
36
Unlocking Calibration by Remote
37
Changing the Password
37
Changing the Password from the Front Panel
38
Changing the Password by Remote
38
Resetting the Calibration Password
38
Viewing Calibration Dates and Calibration Count
39
Calibration Errors
39
Front Panel Error Reporting
39
Remote Error Reporting
39
Front Panel Calibration
39
Figure 2-1 Voltage Calibration Test Connections
40
Table 2-3 Front Panel Voltage Calibration
42
Figure 2-2 10Μa to 1A Range Current Calibration Test Connections
43
Figure 2-3 3A Range Current Calibration Test Connections
45
Table 2-4 Front Panel Current Calibration
46
Remote Calibration
47
Remote Calibration Commands
47
Recommended Calibration Parameters
48
Table 2-6 Recommended :Calibration:protected:sense Parameter Ranges
49
Remote Calibration Procedure
50
Table 2-8 Voltage Calibration Initialization Commands
51
Table 2-9 Voltage Range Calibration Commands
52
Single-Range Calibration
55
Routine Maintenance
57
Introduction
58
Line Fuse Replacement
58
Figure 3-1 Rear Panel
58
Table 3-1 Power Line Fuse
59
Troubleshooting
61
Introduction
62
Safety Considerations
62
Repair Considerations
62
Power-On Self-Test
63
Front Panel Tests
63
KEYS Test
63
DISPLAY PATTERNS Test
63
CHAR SET Test
64
Principles of Operation
64
Figure 4-1 Overall Block Diagram
64
Figure 4-2 Analog Circuitry Block Diagram
64
Figure 4-3 Power Supply Block Diagram
64
Figure 4-4 Output Stage Simplified Schematic
64
Figure 4-5 Digital Circuitry Block Diagram
64
Overall Block Diagram
65
Analog Circuits
66
Output Stage
67
Power Supply
67
A/D Converter
69
Active Guard
69
Digital Circuitry
69
Display Board Circuit Theory
70
Troubleshooting
71
Display Board Checks
71
Power Supply Checks
72
Digital Circuitry Checks
72
Analog Circuitry Checks
73
Battery Replacement
73
Battery Replacement Precautions
74
Battery Replacement Procedure
74
No Comm Link Error
74
Disassembly
75
Introduction
76
Handling and Cleaning
76
Handling PC Boards
76
Solder Repairs
76
Static Sensitive Devices
77
Assembly Drawings
77
Case Cover Removal
77
Analog Board Removal
78
Digital Board Removal
79
Front Panel Disassembly
80
Removing Power Components
80
Power Module Removal
80
Instrument Re-Assembly
81
Introduction
84
Parts Lists
84
Ordering Information
84
Factory Service
84
Component Layouts
84
Table 6-1 Analog Board Parts List
85
Table 6-2 Digital Board Parts List
95
Table 6-3 Display Board Parts List
101
Table 6-4 Pulse Board Parts List
102
Table 6-5 Mechanical Parts List
103
Specifications
105
Accuracy Calculations
115
Measurement Accuracy
115
Source Accuracy
115
Command Reference
117
Introduction
118
Command Summary
118
Miscellaneous Commands
119
Code
119
Count
119
Lock
119
Save
120
Date
120
Ndue
121
Sense
121
Source
122
Table B-3 Recommended:calibration:protected:source Parameter Ranges
123
Data
124
Detecting Calibration Errors
124
Reading the Error Queue
124
Error Summary
124
Status Byte EAV (Error Available) Bit
125
Generating an SRQ on Error
125
Detecting Calibration Step Completion
126
Using the *OPC? Query
126
Using the *OPC Command
126
Generating an SRQ on Calibration Complete
127
Calibration Programs
129
Introduction
130
Computer Hardware Requirements
130
Software Requirements
130
Calibration Equipment
130
General Program Instructions
130
Program C-1 Model 2430 Calibration Program
132
Requesting Calibration Constants
135
Program C-2 Requesting Calibration Constants
135
Performance Verification
138
Calibration
138
Routine Maintenance
138
Troubleshooting
138
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Keithley 2430 Specifications
General
Brand
Keithley
Model
2430
Category
Measuring Instruments
Language
English
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