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486
Keithley 486 User Manual
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SECTlON
5
Performance
Ven$i2ztion
Table
5-2
Picoammeter
Verification
I
4841487
I
263
v/R
AMPS
I
263
current
I
Allowable
Read&?
-Iv
1
Range
setting
I
(18T
to
28°C)
”
I
I
2nA
2nA
1.90000nA
1.8958OnA
to
1.9062OnA
2E
L%i
19.mOnA
18.959OnA
to
19.041OnA
19o.omlA
189.695nA
to
190.305nA
2%
lXKXJ@
1.89695w
to
1.90505pA
19.muA
18.979OuA
to
19.021OuA
EU.oaO~
189.79OjlA
to
190.21Ob
2mA
1.9woomA
1.8979OmA
to
1.9021omA
5-3
139
141
Table of Contents
Table of Contents
26
List of Tables
34
Default Chapter
36
Features
36
Inspection
36
Optional Accessories
37
Manual Addenda
36
SAFETY SYMBOLS and TERMS
36
Specifications
36
Warranty Information
36
2 Getting Started
38
Front and Rear Panel Configuration
38
Basic Front Panel Operation
42
Current Measurements
43
Introduction
38
Ohms Measurements (Model 487)
43
Basic Ieee-488 Operation
46
Current Measurements over the Bus
48
Front Panel Operation
50
Fuse Replacement 3-L
50
Power Cord
51
Introduction
50
Power-Up Procedure
50
Line Voltage Setting 3-L
50
Default Conditions
51
Line Cycle Integration
52
Warm up Period
52
Power up Sequence
51
Error Messages
52
Table 3-3 Factory Default Conditions (Front Panel)
52
Data Entry; Basic Rules
53
Table 3-4 Error Messages
53
Autorange
54
Zero Check and Correct
54
Current Measurements
54
Current Ranges
54
Filters
55
Rel
56
Current Measurements
57
USING the VOLTAGE SOURCE (Model 487)
59
Table 3-7 Model 487 V-Source
59
Test Fixture and Interlock
59
Preset
61
Basic V-Source Operating Procedure
62
I-Limit
62
Operate
62
OHMS MEASUREMENTS (Model 487)
63
Menu
65
Datarecall
66
Datastore
66
I-Limit(Model487)
67
Integration
67
IEEE-488Addressortalk.only
68
Self-Test
68
Calibrate
69
Calvsrc(Mode1487)
69
Debug
69
Frontpaneltriggering
69
Triggermode
69
Trigger Sources
70
Triggerdelay
70
Triggerinterval
70
External Triggering
71
Trigger Examples
71
3.11 Data Store
72
Externaltrigger
72
Meter Complete
72
Storing Data at Programmed Intervals
72
Analogoutput
74
Recallingdata
74
Table 3-9 Typical Analog Output Values
75
3.13 Talk-Only
76
Measuring Current Generated by an LED
76
Operatingexamples
76
Resistivity Tests (Model 487)
78
Basic Source V/Measure I Configuration
80
SOURCE VOLTAGE/MEASURE CURRENT (Model 487)
80
Testing2-Terminaldevices
81
Source Resistance
82
Sourcecapacitance
82
Table 3-11 Feedback Capacitor (CF) Values
82
Electromagnetic Interference (EMI)
84
Electrostatic Interference
84
Groundloops
84
Thermalemfs
84
Floating Measurements
85
4 IEEE-488 Reference
86
Device-Dependent Command Programming
86
Introduction
86
A-Display Intensity
91
B-Readingsource
92
Zero Check and Zero Correct
93
D-Display
94
F-V/Iohms
95
G-Dataformat
96
J-Self-Tests
101
Table 4-2 Typical Bus Holdoff Times
103
EOI and Bus Hold-Off
104
M - SRQ Mask and Serial Poll Byte Format
106
N-Ddatastore;Armandsetsize
109
0-Operate(Mode1487)
111
P-Filters
112
Q-Interval
113
R-Range
114
S~Integrationperiod
115
T-Trigger
116
U-Status
117
V-Voltagesource
123
W~Delay
124
X-Execute
125
Y-Terminator
126
Z-Relative
127
General Bus Commands
129
IFC (Interfaceclear)
129
Ren(Remoteenable)
129
Table 4-4 IEEE Contact Designations
129
Llo(Locallockout)
130
GET (Group Execute Trigger)
130
GTL (Go to Local) and Local
130
Dcl(Deviceclear)
130
Sdc(Selectivedeviceclear)
130
Ieee-488Busconnections
131
Primary Address Selection
132
SPE, SPD (Serial Polling)
131
Controller Programming
133
Front Panel Aspects of Ieee-488 Operation
133
Front Panelerror Messages
133
Table 4-5 HP BASIC 4.0 IEEE-488 Statements
133
Table 46 IEEE-488 Error Messages
134
IEEE-488 Status Indicators
135
Bus Data Transmission Times
136
Localkey
136
Table 5-2 Picoammeter Verification
140
Table 6-L Rangerelays
145
Circuit Board Removal
168
Front Panel Removal
168
Special Handling of Static Sensitive Devices
168
Analog Control Lines
169
Recommended Troubleshooting Equipment
169
Self-Test
169
Table 7-4 Recommended Troubleshooting Equipment
169
Troubleshooting
169
A/D Test Mode
170
Troubleshooting Procedures
170
Fusible Resistor Replacement
176
Input Offset Voltage Adjust
176
8-L
177
Factoryservice
177
Introduction
177
Orderinginformation
177
Replaceable Parts
177
Schematic Diagrams and Component Location Drawings
177
Device-Dependent Command Summary A-L
207
B-L
209
Interface Function Codes
209
C-L
210
IEEE-488Busoverview
222
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Keithley 486 Specifications
General
Brand
Keithley
Model
486
Category
Measuring Instruments
Language
English
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