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Keithley 199 User Manual
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Model
199
System
DMM
Scanner
Instruction
Manual
0
1988,
Keith&
Instruments,
Inc
Test
Instrumentation
Group
All
rights
reserved.
Cleveland,
Ohio,
U.S.A.
July
1987,
Fourth
Printing
Document
Number:
199-901-01
Rev.
D
2
4
Table of Contents
Table of Contents
11
SECTION L-General Information
20
Features
20
Warranty Information
20
Manual Addenda Manual Ai
20
Specifications
21
Inspection
21
Manual
21
Getting Started
21
Accessories
22
SECTION 2-Basic DMM Operation
23
Introduction
23
Linepower
23
Powerupsequence
23
Default Conditions
23
Front Panel Familiarizaxton
25
Display and Indicators
25
Controls
26
Model 199 Rear Panel
27
CAL LOCK Switch
27
Inputswitch
27
Connectors and Terminals
28
Line Voltage Aspects
28
IEEE-488 Connector
28
Scanner Card Slot. T
28
Display Messages
28
Error Messages
28
BASICMEAS-Ijrements
29
Warmupperiod
29
Zero
29
DC Voltage Measurements
32
Low-Level Measurement Considerations
32
Resistance Measurements
33
Two-Terminal Resistance Measurements
33
Four-Terminal Resistance Measurements
33
Resistance Ranges
33
TRMS AC Voltage Measurements
34
Dbmeasurements
35
Corresponding Voltage Reference Levels for Impedance References
36
Trmsconsiderations
36
Comparison of Average and TRMS Meter Readings
37
Db Applications
38
DMM Setup PROGRAMS
38
Softwarerevisionlevei
39
Multiplexer, Autozeroical
39
Scanner Connections
46
Voltage Test Connections
49
Amplifier Gain Test Configuration
57
Typical Minimum Usable Scan Intervals
60
Section 3-Ieee-488
65
IEEE-488 Connector
66
Section 3-Ieee-488
66
Model 199 Interface Function Codes
67
BASIC Statements Necessary to Send Bus Commands
68
Factory Default Conditions
72
SDC (Selective Device Clear)
73
GET (Group Execute Trigger)
73
Device-Dependent Command Summary
76
Range(R)
77
Scanner Programming Commands. _
77
Zero(Z)
78
Filter (I')
78
Triggermode
80
Reading Mode (B)
80
Data Store Interval(Q) and Size (I)
80
Value (V) and Calibration (C)
81
Defaultc&Ditions(L)
82
Data Format (G)
82
SRQ Mask (M) and Serial Poll Byte Format
83
SRQ Mask and Serial Poll Byte Format
84
EOI and Bus Hold-Off Modes (K)
85
Terminator (Y)
86
Status(U)
86
Auto/Cal Multiplex (A)
89
Trigger Delay (W)
89
Self-Test(J)
90
Hit Button (H)
90
Display(D)
91
Translatorsoftware
91
Translatoe Format
92
Wild Card ($)
93
Translator Error Messages
93
NEW and OLD
94
Combiningtranslator Words
94
Combining Translator Words with Keithley IEEE-488 Comniarids
95
Executing Translator Words A& Keithley IEEE Commands
95
Save
95
List
95
Forget
96
Bus Data Transmission
96
Times
96
Scanner Programming
96
Scanner Setup (N)
99
Pole/Ratio Mode (0)
100
Reading Interval and Delay Programming
100
Using Data Store with the Scanner
101
Testing Resistors
102
Amplifier Gain Testing
105
SECTION 4-Performance Verification
108
Introduction
108
Initialconditions
108
Recommended Test Equipment
108
Verification Procedures
109
DC Volts Verification
109
TRMS AC Volts Verifications
109
Ohms Verification
110
Connections for TRMS AC Volts Verification
110
Limits for TRMS AC Volts Verification
110
DC Current Verification
111
TRMS AC Current Verification
112
Connections for DC Current Verification
112
Connections for TRMS AC Current Verification
112
Limits for AC Current Verification
112
SECTION 5-Principles of Operation
113
Introduction
113
Analog Circuitry
113
Inputsignalconditioning
113
SECTION 5-Principles of Operation
116
Multiplexer . ~5-6
120
28V Reference Source
120
Inputbufferamplifier
120
Controlcircuitry
122
Digitalcircuitry
122
Display Circuitry
122
Powersui'I'lies
122
Scanner
122
Switching Relays
123
SECTION 6-Maintenance
124
Introduction
124
Linevoltageselection
124
Linefuse
124
Current Fuse
125
Calibration
125
Recommended Calibration Equipment
125
SECTION 6-Maintenance
125
Environmental Conditions
126
Warm-Upperiod
126
CAL Lock Switch
126
Front Panel Calibration
126
Recommended Calibration Equipment
126
IEEE-488 Bus Calibration
127
Ieee-488
127
Calibration Sequence
128
Dcvoltscalibration
128
DC Volts Calibration
129
Resistance Calibration
129
Trmsacvoltscalibration
131
TRMS AC Volts Calibration
131
TRMS AC Current Calibration
135
DC Current Calibration
135
Disassembly Instructions
136
TRMS AC Current Calibration
136
Special Handling
140
Troubleshooting
140
Recommended Test Equipment
140
Diagnostics
141
Signal Conditioning Checks
141
Scanner Checks
141
Power Supply Checks
144
Digital Circuitry
144
Installation
145
Scannerboard Checks
145
Card Checkout
146
Relay Shield Jumper
147
~.~~_
150
~ T
153
,,,._J
153
Appendix C-Ieee-488
183
IEEE Command Group
187
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Keithley 199 Specifications
General
Brand
Keithley
Model
199
Category
Scanner
Language
English