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Keithley 2400 Service Manual
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W
ARNING:
NO INTERNAL
OPERATOR SERVICABLE P
ARTS,
SERVICE BY QU
ALIFIED PERSONNEL ONL
Y.
CA
UTION:
FOR CONTINUED PR
OTECTION
AGAINST FIRE HAZARD
, REPLACE FUSE
WITH SAME TYPE
AND RATING.
MADE IN
U.S
.A.
INPUT/
OUTPUT
250V
PEAK
250V
PEAK
TRIGGER
LINK
4-WIRE
SENSE
HI
LO
LINE RA
TING
100-240V
AC
50, 60, Hz
190V
A MAX.
RS-232
IEEE-488
(ENTER IEEE ADDRESS
WITH FRONT P
ANEL MENU)
250V
PEAK
5V
PEAK
5V
PEAK
5V
PK
V,
Ω
,
GUARD
GUARD
SENSE
LINE FUSE
SLO
WBLOW
2.5A, 250V
OUTPUT
ENABLE
FUSE DRA
WER
L
U
CU
S
LISTED
SourceMeter
4ZA4
CA
T
I
!
Fi
gure
3
-
1
Rear panel
3-3
Model 2400 Service Manual
Routine Maintenance
2400-902-01 (G - Feb 2006)
52
54
Table of Contents
Default Chapter
7
Table of Contents
7
List of Illustrations
11
List of Tables
12
1 Performance Verification
13
Introduction
14
Verification Test Requirements
14
Environmental Conditions
14
Warm-Up Period
14
Line Power
15
Recommended Test Equipment
15
Verification Limits
15
Restoring Factory Defaults
16
Performing the Verification Test Procedures
17
Test Summary
17
Test Considerations
17
Setting the Source Range and Output Value
18
Setting the Measurement Range
18
Compliance Considerations
18
Compliance Limits
18
Types of Compliance
18
Maximum Compliance Values
19
Determining Compliance Limit
19
Taking the Sourcemeter out of Compliance
20
Output Voltage Accuracy
20
Voltage Measurement Accuracy
22
Output Current Accuracy
23
Current Measurement Accuracy
24
Resistance Measurement Accuracy
25
2 Calibration
29
Introduction
30
Environmental Conditions
30
Temperature and Relative Humidity
30
Warm-Up Period
30
Line Power
30
Calibration Considerations
31
Calibration Cycle
31
Recommended Calibration Equipment
32
Unlocking Calibration
32
Changing the Password
34
Resetting the Calibration Password
34
Viewing Calibration Dates and Calibration Count
35
Calibration Errors
35
Front Panel Calibration
36
Remote Calibration
44
Remote Calibration Commands
44
Remote Calibration Procedure
46
Single-Range Calibration
50
3 Routine Maintenance
51
Line Fuse Replacement
52
Rear Panel
53
4 Troubleshooting
55
Introduction
56
Repair Considerations
56
Power-On Self-Test
56
Front Panel Tests
57
KEYS Test
57
DISPLAY PATTERNS Test
57
CHAR SET Test
58
Principles of Operation
58
Analog Circuits
58
Power Supply
60
Output Stage
61
A/D Converter
62
Active Guard
62
Digital Circuitry
62
Troubleshooting
64
Display Board Checks
64
Power Supply Checks
64
Digital Circuitry Checks
65
Analog Circuitry Checks
65
Battery Replacement
66
No Comm Link Error
67
5 Disassembly
69
Introduction
70
Handling and Cleaning
70
Handling PC Boards
70
Solder Repairs
70
Static Sensitive Devices
71
Assembly Drawings
71
Case Cover Removal
72
Analog Board Removal
72
Digital Board Removal
74
Front Panel Disassembly
74
Removing Power Components
75
Power Supply Removal
75
Power Module Removal
75
Instrument Reassembly
75
6 Replaceable Parts
77
Introduction
78
Parts Lists
78
Ordering Information
78
Factory Service
79
Component Layouts
79
Specifications
91
Accuracy Calculations
110
Measure Accuracy
110
Source Accuracy
110
Command Reference
111
Introduction
112
Command Summary
112
Miscellaneous Commands
113
Detecting Calibration Errors
119
Reading the Error Queue
119
Error Summary
119
Status Byte EAV (Error Available) Bit
120
Generating an SRQ on Error
120
Detecting Calibration Step Completion
121
Using the *OPC? Query
121
Using the *OPC Command
121
Generating an SRQ on Calibration Complete
122
Calibration Programs
123
Introduction
124
Computer Hardware Requirements
124
Software Requirements
124
Calibration Equipment
124
General Program Instructions
125
Program C-1. Model 2400 Calibration Program
125
Requesting Calibration Constants
128
Program C-2. Requesting Calibration Constants
128
5
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Keithley 2400 Specifications
General
Brand
Keithley
Model
2400
Category
Measuring Instruments
Language
English
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