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Keithley
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2015
Keithley 2015 Service Manual
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4-24
Troubleshooting
Table 4-14
DCA signal multiplexing and gain
Table 4-15
Ω
2 signal multiplexing and gain
Table 4-16
Ω
4 signal multiplexing and gain
Range
Signal
(U163)
U129
pin 1
U129
pin 8
U129
pin 9
Gain
(U166)
10mA
100mA
1A
3A
S6
S6
S6
S6
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
×
100
×
100
×
100
×
10
Range
Signal
(U163)
U129
pin 1
U129
pin 8
U129
pin 9
Gain
(U166)
100
Ω
1k
Ω
10k
Ω
100k
Ω
1M
Ω
10M
Ω
100M
Ω
S4
S4
S4
S4
S4
S4
S4
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
×
100
×
10
×
10
×
10
×
1
×
1
×
1
Range
Signal
(U163)
U129
pin 1
U129
pin 8
U129
pin 9
Gain
(U166)
100
Ω
1k
Ω
10k
Ω
100k
Ω
1M
Ω
10M
Ω
100M
Ω
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
×
100
×
10
×
10
×
10
×
1
×
1
×
1
86
88
Table of Contents
Default Chapter
1
Service Manual
1
Safety Precautions
5
Table of Contents
7
Performance Verification
15
Introduction
16
Performance Verification
16
Verification Test Requirements
17
Environmental Conditions
17
Warm-Up Period
17
Line Power
17
Recommended Test Equipment
18
Recommended Verification Equipment
18
Verification Limits
19
Example Reading Limit Calculation
19
Calculating Resistance Reading Limits
19
Restoring Factory Defaults
20
Performing the Verification Test Procedures
21
Test Summary
21
Test Considerations
21
Verifying DC Voltage
22
DCV Reading Limits
23
Verifying AC Voltage
24
ACV Reading Limits
25
Verifying DC Current
26
DCI Limits
26
Verifying AC Current
27
ACI Limits
27
Verifying Resistance
28
Verifying Temperature
30
Verifying Frequency
31
Verifying Total Harmonic Distortion
32
Verifying Function Generator Amplitude
33
Calibration
34
Introduction
35
Environmental Conditions
36
Warm-Up Period
36
Line Power
36
Calibration Considerations
37
Calibration Code
38
Front Panel Calibration Code
38
Remote Calibration Code
38
Comprehensive Calibration
39
Calibration Cycle
39
Recommended Equipment
39
Recommended Equipment for Comprehensive Calibration
39
Aborting Calibration
40
Front Panel Calibration
40
Preparing the Model 2015 for Calibration
40
Front Panel Short and Open Calibration
41
2 Calibration
41
Low-Thermal Short Connections
41
Comprehensive Calibration Procedures
41
DC Volts Calibration
42
Connections for DC Volts and Ohms Calibration
42
DC Volts Calibration Summary
43
Resistance Calibration
44
Ohms Calibration Summary
44
DC Current Calibration
45
Connections for DC and AC Amps Calibration
45
DC Current Calibration Summary
45
AC Voltage Calibration
46
Connections for AC Volts Calibration
46
AC Voltage Calibration Summary
46
AC Current Calibration
47
Distortion Calibration
47
AC Current Calibration Summary
47
Function Generator Calibration
48
Connections for Distortion Calibration
48
Connections for Function Generator Calibration
48
Distortion and Function Generator Calibration Summary
48
Setting Calibration Dates and Saving Calibration
49
Remote Calibration
49
Preparing the Model 2015 for Calibration
50
Short and Open Calibration
50
DC Volts Calibration
51
Calibration
51
DC Voltage Calibration Programming Steps
51
Resistance Calibration
52
Resistance Calibration Programming Steps
52
DC Current Calibration
53
DC Current Calibration Programming Steps
53
AC Voltage Calibration
54
AC Voltage Calibration Programming Steps
54
AC Current Calibration
55
Distortion Calibration
55
AC Current Calibration Programming Steps
55
Distortion and Function Generator Calibration Steps
55
Function Generator Calibration
56
Programming Calibration Dates
56
Saving Calibration Constants
56
Locking out Calibration
56
Manufacturing Calibration
57
Recommended Test Equipment
57
Unlocking Manufacturing Calibration
57
Measuring Synthesizer Signal Amplitude
57
Recommended Equipment for Manufacturing Calibration
57
Front Panel Manufacturing Calibration
58
Synthesizer Connections for Manufacturing Calibration
58
Remote Manufacturing Calibration
59
Routine Maintenance
61
Introduction
61
Setting the Line Voltage and Replacing the Line Fuse
61
Replacing the AMPS Fuse
62
Power Module
62
Power Line Fuse
62
Routine Maintenance
63
Troubleshooting
64
Introduction
65
Repair Considerations
66
Power-On Self-Test
67
Front Panel Tests
68
KEY Test
68
DISP Test
68
4 Troubleshooting
69
Principles of Operation
69
Power Supply
69
Power Supply Block Diagram
69
Digital Circuitry Block Diagram
69
Analog Circuitry Block Diagram
69
Distortion Digital Circuitry Block Diagram
69
Distortion Analog Circuitry Block Diagram
69
Sine Generator Circuitry Block Diagram
69
Power Supply Components
70
Display Board
71
Digital Circuitry
72
Analog Circuitry
74
Distortion Digital Circuitry
76
Distortion Analog Circuitry
78
Sine Generator Circuitry
79
Troubleshooting
81
Display Board Checks
81
Power Supply Checks
82
Digital Circuitry Checks
83
Analog Signal Switching States
84
DCV Signal Switching
84
ACV and FREQ Signal Switching
84
Ω 2 Signal Switching
85
Ω 4 Signal Switching
85
Ω 2/ Ω 4 Reference Switching
85
DCA Signal Switching
86
ACA Signal Switching
86
DCV Signal Multiplexing and Gain
86
ACV and ACA Signal Multiplexing and Gain
86
DCA Signal Multiplexing and Gain
87
Ω 2 Signal Multiplexing and Gain
87
Ω 4 Signal Multiplexing and Gain
87
Troubleshooting
88
Switching Device Locations
88
Disassembly
89
Introduction
90
Handling and Cleaning
91
Handling PC Boards
91
Solder Repairs
91
Static Sensitive Devices
92
Assembly Drawings
93
Disassembly
93
Disassembly Procedures
94
Case Cover Removal
94
DMM Board Removal
94
DSP Board Removal
95
Front Panel Disassembly
96
Removing Power Components
96
Instrument Reassembly
97
Input Terminal Wire Connections
97
Power Module Wire Connections
97
Input Terminal Wire Colors
97
Power Module Wire Colors
97
5 Disassembly
98
Changing Trigger Link Lines
98
Trigger Link Line Connections
98
Main CPU Firmware Replacement
99
Replaceable Parts
101
Introduction
102
Parts Lists
102
Ordering Information
102
Factory Service
102
Component Layouts
102
Replaceable Parts
102
DMM (Mother) Board Parts List
103
Display Board Parts List
109
Distortion (DSP) Board Parts List
110
Mechanical Parts List
114
Math Functions
121
Frequency and Period Characteristics
121
Temperature Characteristics
122
General Specifications
122
A Specifications
123
Accuracy Calculations
123
Calculating DC Characteristics Accuracy
123
Calculating AC Characteristics Accuracy
123
Calculating Dbm Characteristics Accuracy
124
Calculating Db Characteristics Accuracy
125
Additional Derating Factors
125
Optimizing Measurement Accuracy
126
DC Voltage, DC Current, and Resistance
126
AC Voltage and AC Current
126
Temperature
126
Optimizing Measurement Speed
126
B Calibration Reference
127
Calibration Reference
128
Introduction
128
Command Summary
129
Remote Calibration Command Summary
129
Miscellaneous Calibration Commands
131
Code
131
Count
131
Init
132
Lock
132
Lock?
133
Save
133
Date
134
Ndue
134
DC Calibration Commands
135
Step1
135
Step2
136
Step3
136
Step4
136
Step5
137
Step6
137
Step7
137
Step8
138
Step9
138
Step10
138
Step11
139
Step12
139
AC Calibration Commands
140
Ac:step<N
141
Distortion and Function Generator Calibration Commands
142
Dist:step1
142
Dist:step2
142
Fgen:step1
142
Manufacturing Calibration Commands
143
Ac:step<14|15
143
DC:step0
143
Calibration Error Summary
144
Error Queue
146
Status Byte EAV (Error Available) Bit
146
Generating an SRQ on Error
146
Remote Error Reporting
144
Error Summary
144
Detecting Calibration Step Completion
147
Using the *OPC? Query
147
Using the *OPC Command
147
Generating an SRQ on Calibration Complete
148
C Calibration Program
149
Introduction
150
Computer Hardware Requirements
150
Software Requirements
150
Calibration Equipment
150
General Program Instructions
151
Distortion Characteristics
155
Optimizing Measurement Accuracy
156
4
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Keithley 2015 Specifications
General
Brand
Keithley
Model
2015
Category
Multimeter
Language
English
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