Main
Page
Agilent 34970A Data Acquisition / S witch Unit
The Front Panel at a Glance
1 State Storage / Remote Interface Menus
Denotes a menu key. See the next page for details on menu operation.
The Front-Panel Menus at a Glance
Display Annunciators
The Rear Panel at a Glance
BenchLink Data Logger Software at a Glance
The Plug-In Modules at a Glance
34901A 20-Channel Armature Multiplexer
34902A 16-Channel Reed Multiplexer
34903A 20-Channel Actuator / G eneral-Purpose Switch
34904A 4x8 Two-Wire Matrix Swit ch
34905/6A Dual 4-Channel RF Mul t iplexers
34907A Multifunction Module
34908A 40-Channel Single-Ended Multiplexer
In This Book
Contents
Contents
Contents
Contents
Contents
Page
Quick Start
To Prepare the Instrument for Use
Installing BenchLink Data Logger Software
Installation Procedure
Creating Installation Floppy Disks
On-Line Help System
To Connect Wiring to a Module
Page
To Set the Time and Date
7,0(30
-81
To Configure a Channel for Scanning
Page
To Copy a Channel Configuration
3$67(72
To Close a Channel
If the Instrument Does Not Turn On
Page
Page
To Rack Mount the Instrument
Page
Page
Page
Front-Panel Overview
Front-Panel Menu Reference
35
Chapter 2 Front-Panel Overview Front-Panel Menu Reference
36
To Monitor a Single Channel
To Set a Scan Interval
,17(59$/6&$1
6&$16
To Apply Mx+B Scaling to Measurements
,
,9'&
/$%(/$6/%6
To Configure Alarm Limits
86($/$50
+,$/$5021/<
,&
To Read a Digital Input Port
',1
To Write to a Digital Output Port
'287
'287
To Read the Totalizer Count
5($'5(6(7
727
To Output a DC Voltage
9'$&
9'$&
To Configure the Remote Interface
+3,%
$''5(66
56
%$8'
(9(1,%,76
)/2:'75'65
To Store the Instrument State
Page
System Overview
Data Acquisition System Overview
The Computer and Interface Cable
Measurement Software
The 34970A Data Acquisition / Switch Unit
Plug-In Modules
System Cabling
Transducers and Sensors
Alarm Limits
Signal Routing and Switching
Switching Topologies
Page
Page
Measurement Input
The Internal DMM
Page
Scanning
Page
Scanning With External Instruments
The Multifunction Module
Page
Control Output
The Multifunction Module
Page
The Actuator / General-Purpose Switch
Page
Page
Features and Functions
SCPI Language Conventions
Rules for Using a Channel List
Scanning
Rules for Scanning
Page
Page
Power Failure
Adding Channels to a Scan List
Page
Scan Interval
Page
Page
Page
Page
Page
Scan Count
Reading Format
Channel Delay
Automatic Channel Delays
89
DC Voltage, Thermocouple, DC Current (for all ranges):
Resistance, RTD, Thermistor (2- and 4-wire):
AC Voltage, AC Current (for all ranges):
Viewing Readings Stored in Memory
Page
Page
Single-Channel Monitoring
Page
Scanning With External Instruments
Page
Page
General Measurement Configuration
Measurement Range
Page
Measurement Resolution
9'&
P9'&
,2+0
Page
Page
Custom A/D Integration Time
Page
Autozero
Temperature Measurement Configuration
Measurement Units
Thermocouple Measurements
Page
Page
RTD Measurements
Page
Thermistor Measurements
Voltage Measurement Configuration
DC Input Resistance
AC Low Frequency Filter
Resistance Measurement Configuration
Offset Compensation
Current Measurement Configuration
AC Low Frequency Filter
Page
Frequency Measurement Configuration
Low Frequency Timeout
Mx+B Scaling
Page
Page
Alarm Limits
Page
Page
Page
Viewing Stored Alarm Data
Page
Using the Alarm Output Lines
Page
Using Alarms With the Multifunction Mo dule
;%,1
Page
Page
Digital Input Operations
Page
Totalizer Operations
Page
Page
Digital Output Operations
DAC Output Operations
System-Related Operations
State Storage
Page
Error Conditions
Self-Test
Display Control
Real-Time System Clock
Internal DMM Disable
Firmware Revision Query
Relay Cycle Count
Page
SCPI Language Version Query
Remote Interface Configuration
GPIB Address
Remote Interface Selection
Baud Rate Selection (RS-232)
Parity Selection (RS-232)
Flow Control Selection (RS-232)
Page
Calibration Overview
Calibration Security
Page
Page
Calibration Message
Calibration Count
Factory Reset State
160
Chapter 4 Features and Functions Factory Reset State
Instrument Preset State
161
Chapter 4 Features and Functions Instrument Preset State
Multiplexer Module Default Settings
162
Chapter 4 Features and Functions Multiplexer Module Default Settings
Module Overview
34901A 20-Channel Multiplexer
164
Chapter 4 Features and Functions 34901A 20-Channel Multiplexer
Chapter 4 Features and Functions 34901A 20-Channel Multiplexer
165
34902A 16-Channel Multiplexer
Chapter 4 Features and Functions 34902A 16-Channel Multiplexer
167
34903A 20-Channel Actuator
Chapter 4 Features and Functions 34903A 20-Channel Actuator
169
34904A 4x8 Matrix Switch
Chapter 4 Features and Functions 34904A 4x8 Matrix Switch
171
34905A/6A Dual 4-Channel RF Multiplexers
Chapter 4 Features and Functions 34905A/6A Dual 4-Channel RF Multiplexers
173
34907A Multifunction Module
Digital Input/Output
Totalize Input
Analog Output (DAC)
Chapter 4 Features and Functions 34907A Multifunction Module
175
Chapter 4 Features and Functions 34908A 40-Channel Single-Ended Multiplexer
176
Chapter 4 Features and Functions 34908A 40-Channel Single-Ended Multiplexer
177
Page
Page
Remote Interface Reference
SCPI Command Summary
Rules for Using a Channel List
Rules for Using scan_list and ch_list Parameters
Scan Measurement Commands (see page 226 for more information)
Monitor Commands (see page 237 for more information)
183
SCPI Command Summary
Scan Configuration Commands (see page 226 for more information)
SCPI Command Summary
184
Scan Statistics Commands (see page 233 for more information)
Scan Memory Commands (see page 235 for more information)
185
SCPI Command Summary
Scanning With an External Instrument (see page 239 for more information)
SCPI Command Summary
186
Temperature Configuration Commands (see page 219 for more information)
SCPI Command Summary
187
Voltage Configuration Commands (see page 223 for more information)
SCPI Command Summary
188
Resistance Configuration Commands (see page 224 for more information)
SCPI Command Summary
189
SCPI Command Summary
190
Frequency and Period Configuration Commands (see page 214 for more information)
SCPI Command Summary
191
Mx+B Scaling Commands (see page 244 for more information)
SCPI Command Summary
192
Alarm Limit Commands (see page 247 for more information)
SCPI Command Summary
193
Digital Input Commands (see page 255 for more information)
Totalizer Commands (see page 256 for more information)
194
[SENSe:]TOTalize:CLEar:IMMediate [(@<ch_ list>)] [SENSe:]TOTalize:DATA? [(@<ch_ list>)]
SCPI Command Summary
Digital Output Commands (see page 258 for more information)
DAC Output Commands (see page 258 for more information)
195
Switch Control Commands (see page 259 for more information)
SCPI Command Summary
Page
System-Related Commands (see page 264 for more information)
SCPI Command Summary
197
Interface Configuration Commands (see page 269 for more information)
Status System Commands (see page 286 for more information)
198
SCPI Command Summary
Calibration Commands (see page 292 for more information)
Service-Related Commands (see page 294 for more information)
199
SCPI Command Summary
Page
Simplified Programming Overview
Using the MEASure? Command
Using the CONFigure Command
Using the range and resolution Parameters
Using the READ? Command
Using the INITiate and FETCh? Commands
Page
Page
The MEASure? and CONFigure Commands
Page
Page
Page
Page
Page
Page
Setting the Function, Range, and Resolution
Page
Page
Page
Page
Temperature Configuration Commands
Page
Page
Page
Voltage Configuration Commands
Resistance Configuration Commands
Current Configuration Commands
Frequency Configuration Commands
Scanning Overview
Rules for Scanning
Scan Interval
Page
Page
Page
Page
Page
Page
Page
Page
Page
Single-Channel Monitoring Overview
Page
Scanning With an External Instrument
Page
Page
Page
Page
Mx+B Scaling Overview
Page
Page
Alarm System Overview
Page
Page
Page
Page
Page
Page
Page
Digital Input Commands
Totalizer Commands
Page
Digital Output Commands
DAC Output Commands
Switch Control Commands
Page
State Storage Commands
Page
Page
System-Related Commands
Page
Page
Page
Page
Interface Configuration Commands
RS-232 Interface Configuration
RS-232 Configuration Overview
RS-232 Flow Control Modes
RS-232 Data Frame Format
Connection to a Computer or Terminal
RS-232 Troubleshooting
Modem Communications
The SCPI Status System
What is a Condition Register?
What is an Event Register?
What is an Enable Register?
Agilent 34970A Status System
Alarm Register Questionable Data Register
276
Output Buffer
Status Byte Register
The Status Byte Register
Using Service Request (SRQ) and Serial Poll
Using *STB? to Read the Status Byte
Using the Message Available Bit (MAV)
To Interrupt Your Bus Controller Using SRQ
To Determine When a Command Sequence is Completed
The Questionable Data Register
Page
The Standard Event Register
Page
The Alarm Register
The Standard Operation Register
Status System Commands
Page
Page
Page
Page
Page
Calibration Commands
Page
Service-Related Commands
Page
An Introduction to the SCPI Language
Command Format Used in This Manual
Command Separators
Using the MIN and MAX Parameters
Querying Parameter Settings
SCPI Command Terminators
IEEE-488.2 Common Commands
SCPI Parameter Types
Page
Using Device Clear
Page
Error Messages
Execution Errors
Page
Page
Page
Instrument Errors
Page
Page
Page
Page
Self-Test Errors
Page
Page
Plug-In Module Errors
Page
Page
Application Programs
Example Programs for Excel 7.0
Page
Page
Page
Page
Page
Page
Example Programs for C and C++
Page
Page
Page
Page
Page
Tutorial
System Cabling and Connections
Cable Specifications
Page
Grounding Techniques
Shielding Techniques
Separation of High-Level and Low-Level Signals
Sources of System Cabling Errors
Page
Page
Measurement Fundamentals
The Internal DMM
Page
Temperature Measurements
Page
Page
Page
Page
Page
Thermocouple Types
Chapter 8 Tutorial Measurement Fundamentals
351
Sources of Error in Thermocouple Measurements
Page
DC Voltage Measurements
Sources of Error in DC Voltage Measurements
Page
Page
Page
AC Voltage Measurements
Page
Page
Sources of Error in AC Voltage Measurements
Page
Page
Page
Page
Current Measurements
Sources of Error in DC Current Measurements
Sources of Error in AC Current Measurements
Resistance Measurements
Page
Page
Sources of Error in Resistance Measurements
Strain Gage Measurements
Page
Page
Frequency and Period Measurements
Page
Low-Level Signal Multiplexing and Switch in g
One-Wire (Single-Ended) Multiplexers
Two-Wire Multiplexers
Four-Wire Multiplexers
Signal Routing and Multiplexing
Sources of Error in Multiplexing and Switching
Page
Actuators and General-Purpose Switching
Snubber Circuits
RC Protection Networks
Using Varistors
Using Attenuators
Matrix Switching
Combining Matrices
RF Signal Multiplexing
Sources of Error in RF Switching
Multifunction Module
Digital Input
Digital Output
Using an External Pull-Up
Driving External Switches
Totalizer
Totalizer Errors
Voltage (DAC) Output
DAC Errors
Relay Life and Preventative Maintenance
Relay Life
Relay Load
Switching Frequency
Replacement Strategy
Page
9
Specifications
DC, Resistance, and Temperature Accuracy Specifications
404
DC, Resistance, and Temperature Accuracy Specifications
DC Measurement and Operating Characteristics
405
DC Measurement Characteristics
DC Operating Characteristics
AC Accuracy Specifications
406
AC Accuracy Specifications
AC Measurement and Operating Characteristics
AC Measurement Characteristics
407
AC Operating Characteristics
AC Measurement and Operating Characteristics
Measurement Rates and System Characteristics
408
Single Channel Measurement Rates
N10149
34901A, 34902A, 34908A, 34 903A, 34904A
409
34905A, 34906A
The ac performance graphs are shown on the following page.
410
Typical AC Performance Graphs
Software Specifications
34907A
412
Digital Input / Output
Product and Module Dimensions
To Calculate Total Measurement Error
If you are operating the internal DMM outside the 23 C
Page
Interpreting Internal DMM Specifications
Number of Digits and Overrange
Sensitivity
Resolution
Accuracy
24-Hour Accuracy
90-Day and 1-Year Accuracy
Temperature Coefficients
Configuring for Highest Accuracy Measurements
Page
Index
A
IndexIndex
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
Page
T
U
V
W
X
Z
Page
Manual Part Number
Edition
Assistance
Trademark Information
Certification
DECLARATION OF CONFORMITY
Typical AC Performance Graphs