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Keithley
Multimeter
3730
Keithley 3730 User Manual
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Se
ri
es 3700
Sy
st
em
S
wi
t
ch
/
Mul
t
im
et
er
U
s
er
'
s
Ma
nu
al
Section
3
:
Re
ar Panel
Docu
m
ent
Numbe
r: 3700S
-900-01 Re
v. A
/ August
2007
3
-5
Figu
re 3-3:
USB connectors
An
alog
back
plan
e conn
ecto
r
Ref
er t
o the f
o
l
l
owing fi
gure f
or
anal
og
backplane
connector i
nf
ormati
on. See
Connect
ions
(on
page 3-8) bef
ore making any connecti
ons.
Figu
re 3-4:
Analog backplan
e c
o
nnecto
r
The t
able below contai
ns pin num
bers and descripti
ons f
or the analog bac
kplane connect
or.
Description
Pin
Description
Pin
Analog bac
kplane
3
-H
I
5
DMM
-SL
O
4
Analog bac
kplane
3
-L
O
6
DMM
-SH
I
3
Analog bac
kplane
4
-H
I
7
DMM
-LO
2, 9
Analog bac
kplane
4
-L
O
8
DMM
-HI
1
Analog bac
kplane
5
-HI
12
AMP
-LO
2, 9
Analog bac
kplane
5
-L
O
13
AMP
10, 11
Analog bac
kplane
6
-HI
14
Analog bac
kplane
6
-L
O
15
46
48
Table of Contents
Default Chapter
9
Table of Contents
9
Introduction
19
Measure and Switching Capabilities
20
Reference Manual Content
20
Figure 1-1: DMM Measurement Capabilities
20
Warranty Information
21
Displaying the Unit's Serial Number
21
Safety Symbols and Terms
22
Specifications
22
Using the Front Panel
23
Front Panel Introduction
23
Figure 2-1: Model 3706 System Switch/Multimeter
23
Figure 2-2: Model 3706-S System Switch (no DMM)
24
Display
25
Figure 2-3: Model 3706-NFP System Switch/Multimeter
25
Figure 2-4: Model 3706-SNFP System Switch (no DMM)
25
Figure 2-5: Active Channel Display Example
26
Front Panel Keys
28
Special Keys and Power Switch
28
Figure 2-6: MAIN MENU Display
28
Operation Keys
29
Range, Multifunction Keys, and Wheel
39
Function Keys
39
Rear Panel
43
Rear Panel Summary
43
Figure 3-1: Rear Panel Features
43
Rear Panel Connections
44
Analog Backplane AMPS Fuse
44
Slots
44
TSP-Link Connector
44
Instrument Fuse
44
Power Connector
44
Digital I/O Port
45
Figure 3-2: Digital I/O Port
45
GPIB Connector
46
Ethernet Connector (RJ-45)
46
USB Connectors
46
Analog Backplane Connector
47
Figure 3-3: USB Connectors
47
Figure 3-4: Analog Backplane Connector
47
Switching Module Installation and Connections
48
Module Installation
48
Figure 3-5: Typical Module Installation
49
Connections
50
Channel Assignments
51
Pseudocards
51
Bus Operation
52
Power-Up
53
Line Power Connection
53
Power-Up Sequence
54
System Identification
55
Closing and Opening Switching Module Channels
57
Close/Open Overview
57
Channel Operation (Non-Channel Pattern Operation)
58
Channel Pattern Operation
58
Close/Open Commands and Operation
61
Close/Open Bus Operation
62
Close/Open Key Operation
63
Channel Attributes
63
Duality with Example
64
Channel and Backplane Notation
66
Figure 4-1: Multiplexer Card Display
67
Channel List Parameter <Ch_List
68
Figure 4-2: Matrix Card Display
68
Channel Operation
69
Identifying Installed Modules and Viewing Closed Channels
71
Switching Module Queries (Remote Operation)
71
Figure 4-4: Four-Wire Function
71
Break before Make and Connecting Sequentially
72
Relay Closure Count
73
2 Wire Functions
70
4 Wire Functions (Paired Channels)
70
Figure 4-3: Two-Wire Function
70
Basic Digital Multimeter (DMM) Operation
75
DMM Measurement Capabilities
75
High-Energy Circuit Safety Precautions
76
Performance Considerations
77
Warm-Up
77
Autozero
77
Line Cycle Synchronization
78
Voltage Measurements (DCV and ACV)
78
Figure 5-1: Line Cycle Synchronization
78
Connections
79
DCV Input Divider
79
Figure 5-2: DCV Connection
80
Figure 5-3: ACV Connection
80
Figure 5-4: Rear Panel to Backplane to DMM Connect Relays Schematic
81
Schematic
81
Voltage Measurement Procedure
82
AC Voltage Measurements and Crest Factor
83
Figure 5-5: ACV Measurements: Sine Waves
83
Figure 5-6: ACV Measurements: Square, Pulse, and Sawtooth Waves
84
Speed, Accuracy, and Settling Times for AC Current and Voltage
85
Low Level Considerations
88
Current Measurements (DCI and ACI)
89
Amps Measurement Procedure
89
AMPS Analog Backplane Fuse Replacement
90
Resistance Measurements
91
Basic Resistance Measurements
91
Offset Compensated Ohms (OC+)
91
Dry Circuit Testing (DRY+)
91
Connections
91
Figure 5-7: Two-Wire Resistance Measurements
92
Figure 5-8: Four-Wire Resistance Measurement
92
Figure 5-9: Two-Wire Switching Module Resistance Connection
93
Figure 5-10: Four-Wire Switching Module Resistance Connection
93
Standard Resistance Measurements
94
Offset-Compensated Ohms
94
Figure 5-11: Enabling Offset-Compensated Ohms
95
Figure 5-12: Four-Wire Ohm ATTR MENU: OFFSETCOMP
96
Dry Circuit Ohms (DRY+)
97
Figure 5-13: Enabling Dry-Circuit Ohms
98
Figure 5-14: Four-Wire Ohm ATTR MENU: DRYCIRCUIT
98
Measurement Methods
100
Figure 5-15: Two-Wire Constant-Current Source Method
101
Figure 5-16: Four-Wire Constant-Current Source Method
101
Figure 5-17: Two-Wire Ratiometric Method
102
Figure 5-18: Four-Wire Ratiometric Method
103
Open Lead Detection
104
Figure 5-19: Simplified Dry-Circuit Open Lead Detection Schematic
104
Figure 5-20: Simplified Normal Four-Wire Open Lead Detection Schematic
105
Figure 5-21: Simplified Dry-Circuit Open V-Clamp Feedback Loop Schematic
108
Temperature Measurements
109
Thermocouples
109
Figure 5-22: Simplified T/C Open Lead Detection Schematic
112
Figure 5-23: Simulated Reference Junction
114
Figure 5-24: Simulated Reference Junction Switching Module
114
Figure 5-25: Internal Reference Junction (40 Channel Switching Module)
114
Thermistors
115
Figure 5-26: Thermistor Analog Backplane Connection
116
Figure 5-27: Thermistor Switching Module Connection
116
Rtds (Resistance Temperature Detector)
117
Figure 5-28: Three-Wire RTD Connections
118
Figure 5-29: Three-Wire RTD Switching Module Connections
118
Figure 5-30: Four-Wire RTD Connections
119
Figure 5-31: Four-Wire RTD Switching Module Connections
119
Temperature Measurement Configuration
120
Temperature Measurement Procedure
121
Frequency and Period Measurements
122
Trigger Level
122
Gate Time
122
Frequency Connections
123
Frequency and Period Measurement Procedure
123
Figure 5-32: FREQ and PERIOD Input Connections
123
Figure 5-33: FREQ and PERIOD Connections (Switching Module)
123
Continuity Testing
124
Continuity Testing Connections
125
Continuity Testing Procedure
125
Figure 5-34: Continuity Connections
125
Figure 5-35: Continuity Connections Using a Switching Module
125
ICL Command List
127
Beeper
128
Bit Functions
128
Channel Functions and Attributes
128
Delay Function
130
Digio Functions and Attributes
130
Display Functions and Attributes
130
DMM Functions
131
Eventlog Functions and Attributes
134
Errorqueue Functions and Attribute
134
Exit Function
135
Format Attributes
135
Gpib Attribute
135
Makegetter Functions
135
LAN Commands
135
Localnode Attributes
137
Opc Function
137
Printbuffer
137
Reset Function
138
Scan Functions
138
Setup Functions and Attribute
139
Slot[X] Attributes
139
Status Function and Attributes
140
Timer Functions
142
Trigger Functions
142
Tsplink Functions and Attributes
143
Upgrade Function
143
Userstring Functions
144
Waitcomplete Function
144
Upgrade Procedure Using USB Flash Drive
145
Maintenance
147
Introduction
147
Fuse Replacement
147
Figure 8-1: Fuse Location
148
Front Panel Tests
149
Test Procedure
149
Model 3721 Dual 1X20 Multiplexer Card
151
Series 3700 Module Schematics and Connections
152
Power Budgeting and Calculation
152
Power Budgeting Examples
154
Model 3720 Dual 1X30 Multiplexer Card
158
Available Accessories: Model 3720
158
Connection Information: Model 3720
159
Figure 9-2: D-Sub Connection Information for the Model 3720
159
Schematics: Model 3720
160
Figure 9-3: Schematic of the Model 3720
160
Model 3720 Connection Log
161
Figure 9-4: Sample Model 3720 Connection Log (1 of 2)
161
Figure 9-5: Sample Model 3720 Connection Log
162
Model 3721 Dual 1X20 Multiplexer Card
163
Available Accessories: Model 3721
163
Model 3721-ST Accessory Board Channel List
164
Connection Information: Model 3721
165
Figure 9-7: D-Sub Connection Information for the Model 3721
165
Schematics: Model 3721
166
Figure 9-8: Schematic of the Model 3721 in Two-Pole Mode
166
Model 3721: AMPS Channels Fuse Replacement
167
Figure 9-9: Schematic of the Model 3721 in Four-Wire Common Side Ohm Mode
167
Amps Channel Fuse Replacement Procedure
168
Figure 9-10: Model 3721 Shield Removal
169
Figure 9-11: Model 3721 Fuse Location
169
Model 3721 Connection Log
170
Figure 9-12: Sample Model 3721 Connection Log (1 of 2)
170
Figure 9-13: Sample Model 3721 Connection Log (2 of 2)
171
Model 3722 Dual 1X48 High Density Multiplexer Card
172
Available Accessories: Model 3722
172
Connection Information: Model 3722
173
Figure 9-15: D-Sub Connection Information the Model 3722
173
Schematics: Model 3722
174
Figure 9-16: Schematic for the Model 3722
174
Model 3722 Connection Log
175
Figure 9-17: Sample Model 3722 Connection Log (1 of 3)
175
Figure 9-18: Sample Model 3722 Connection Log (2 of 3)
176
Figure 9-19: Sample Model 3722 Connection Log (3 of 3)
177
Model 3723 Dual 1×30 High-Speed Multiplexer Card
178
Available Accessories: Model 3723
178
Connection Information: Model 3723
179
Figure 9-21: D-Sub Connection Information for the Model 3723
179
Schematics: Model 3723
180
Figure 9-22: Schematic for the Model 3723 in Two-Pole Mode
180
Figure 9-23: Schematic: Model 3723 in One-Pole Mode
181
Model 3723 Connection Log (60 Channel)
182
Figure 9-24: Sample Model 3723 Connection Log (60 Channel)(1 of 2)
182
Figure 9-25: Sample Model 3723 Connection Log (60 Channel)(2 of 2)
183
Model 3723 Connection Log (120 Channel)
184
Figure 9-26: Sample Model 3723 Connection Log (120 Channel)(1 of 4)
184
Figure 9-27: Sample Model 3723 Connection Log (120 Channel)(2 of 4)
185
Figure 9-28: Sample Model 3723 Connection Log (120 Channel)(3 of 4)
186
Figure 9-29: Sample Model 3723 Connection Log (120 Channel)(4 of 4)
187
Model 3730 6×16 High-Density Matrix Card
188
Available Accessories: Model 3730
188
Figure 9-30: Model 3730
188
Connection Information: Model 3730
189
Schematics: Model 3730
189
Figure 9-31: D-Sub Connection Information for the Model 3730
189
Figure 9-32: Schematic of the Model 3730
189
Model 3730 Connection Log
190
Figure 9-33: Sample Model 3730 Connection Log (1 of 3)
190
Figure 9-34: Sample Model 3730 Connection Log (2 of 3)
191
Figure 9-35: Sample Model 3730 Connection Log (3 of 3)
192
Model 3740 32-Channel Isolated Switch Card
193
Available Accessories: Model 3740
193
Figure 9-36: Model 3740
193
Connection Information: Model 3740
194
Figure 9-37: D-Sub Connection Information for the Model 3740
194
Schematics: Model 3740
195
Figure 9-38: Schematic for the Model 3740
195
Model 3740 Connection Log
196
Figure 9-39: Sample Model 3740 Connection Log
196
Specifications
197
Model 3740 32-Channel Isolated Switch Card
197
In this Section
197
System Performance
200
General Specifications
203
Figure 9-1: Model 3720
205
Figure 9-6: Model 3721
207
Figure 9-14: Model 3722
210
Figure 9-20: Model 3723
213
Other manuals for Keithley 3730
Reference Manual
936 pages
Firmware Release Notes
17 pages
5
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Keithley 3730 Specifications
General
Brand
Keithley
Model
3730
Category
Multimeter
Language
English
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