Agilent Technologies 34970A User Manual

User’s Guide

Publication Number 34970-90003 (order as 34970-90101 manual set) Edition 3, March 2003

see the pages following the Index.

Agilent 34970A Data Acquistion / S witch Unit

Note: Unless otherwise indicated, this manual applies to all serial numbers.

The Agilent Technologies 34970A combines precision measurement capability with flexible signal connections for your production and development test systems. Three module slots are built into the rear of the instrument to accept any combination of data acquisition or switching modules. The combination of data logging and data acquisition features makes this instrument a versatile solution for your testing requirements now and in the future.

Convenient Data Logging Features

• Direct measurement of thermocouples, RTDs, thermistors, dc voltage,

ac voltage, resistance, dc current, ac current, frequency, and period

• Interval scanning with storage of up to 50,000 time-stamped readings

• Independent channel configuration with function, Mx+B scaling,

and alarm limits available on a per-channel basis

• Intuitive user interface with knob for quick channel selection,

menu navigation, and data entry from the front panel

• Portable, ruggedized case with non-skid feet

• BenchLink Data Logger Software for Microsoft

Windows

included

Flexible Data Acquisition / Switching Features

• 6

⁄

-digit multimeter accuracy, stability, and noise rejection

• Up to 60 channels per instrument (120 single-ended channels)

• Reading rates up to 600 readings per second on a single channel and

scan rates up to 250 channels per second

• Choice of multiplexing, matrix, general-purpose Form C switching,

RF switching, digital I/O, totalize, and 16-bit analog output functions

• GPIB (IEEE-488) interface and RS-232 interface are standard

• SCPI (Standard Commands for Programmable Instruments) compatibilit y

Agilent 34970A Data Acquisition / S witch Unit

The Front Panel at a Glance

Denotes a menu key. See the next page for details on menu operation.

1 State Storage / Remote Interface Menus

2 Scan Start / Stop Key 3 Measurement Configuration Menu 4 Scaling Configuration Menu 5 Alarm / Alarm Output Configuration Menu 6 Scan-to-Scan Interval Menu 7 Scan List Single Step / Read Key

8 Advanced Measurement / Utility Menus 9 Low-Level Module Control Keys 10 Single-Channel Monitor On / Off Key 11 View Scanned Data, Alarms, Errors Menu 12 Shift / Local Key 13 Knob 14 Navigation Arrow Keys

The Front-Panel Menus at a Glance

Several of the front-panel keys guide you through menus to configu re various parameters of the instrument (see previous page). The following steps demonstrate the menu structure using the key.

1 Press the menu key. You are automaticall y guided to the first level of the menu. Rotate the knob to view the other choices on the first level of the menu.

The menu will automatically timeout after about 20 seconds of inactivity. You will be returned to the operation in progress prior to entering the menu.

2 Press the same menu key again to move to the next item of the menu. Typically, this is where you choose parameter values for the selected operation.

3 Rotate the knob to view the choices on this level of the menu. When you reach the end of the list, rotate the knob in the opposite direction to view all of the other choices.

The current selection is highlighted for emphasis. All other choices are dimmed.

4 Press the same menu key again to accept the change and exit the menu. A brief confirmation message is displayed.

Tip: To review the current configuration of a specific menu, press the menu key several times. A message

NO CHANGES is displayed when you exit the menu.

Display Annunciators

SCAN MON VIEW CONFIG

ADRS RMT ERROR EXT ONCE MEM LAST MIN MAX SHIFT 4W OC

Scan is in progress or enabled. Press and hold again to turn off. Monitor mode is enabled. Press again to turn off. Scanned readings, alarms, errors, or relay cycles are being viewed. Channel configuration is in progress on displayed channel. Measurement is in progress. Instrument is addressed to listen or talk over the remote interface. Instrument is in remote mode (remote interface). Hardware or remote interface errors are detected. Press to read errors. Instrument is configured for an external scan interval. Scan Once mode is enabled. Press to initiate and hold key to disable. Reading memory overflow; new readings will overwrite the oldest readings. Viewed data is the last reading stored during most recent scan. Viewed data is the minimum reading stored during most recent scan. Viewed data is the maximum reading stored during most recent scan.

has been pressed. Press again to turn off. 4-wire function is in use on displayed channel. Offset compensation is enabled on displayed channel. Alarms are enabled on displayed channel. Mx+B scaling is enabled on displayed channel. HI or LO alarm condition has occurred on indicated alarms.

To review the display annun ciators, hold down the key as you turn on the instrument.

The Rear Panel at a Glance

WARNING

1 Slot Identifier (100, 200, 300)

2 Ext Trig Input / Alarm Outputs / Channel

Advance Input / Channel Closed Output (for pinouts, see pages 83 and 128)

3 RS-232 Interface Connector

Use the Menu to:

• Select the GP-IB or RS-232 interface (see chapter 2).

• Set the GP-IB address (see chapter 2).

• Set the RS-232 baud rate, parity, and flow control mode (see chapter 2).

4 Power-Line Fuse-Holder Assembly 5 Power-Line Voltage Setting 6 Chassis Ground Screw 7 GP-IB (IEEE-488) Interface Connector

For protection from electrical shock, the power cord ground must not be defeated. If only a two-contact electrical outlet is available, connect the instrument’s chassis ground screw (see above) to a good earth ground.

BenchLink Data Logger Software at a Glance

Agilent BenchLink Data Logger is a Windows-based application designed to make it easy to use the 34970A with your and analyzing measurements. Use the software to set up your test, acquire and archive measurement data, and perform real-time display and analysis of your incoming measurements.

BenchLink Data Logger’s key functions include the following:

• Configure measurements on the spreadsheet-like Scan Setup page.

• Display measurements graphically using the real-time Data Grid,

Strip Chart, Readout, Bar Meter, XY Plot, and Histogram wind ows.

• Add or configure graphics at any time.

• Use graphical controls to set output voltages, close channels, output

digital values, or view alarms.

• Copy measurement data and graphics to a file or to the Clipboard for

use in other applications.

• Add textual annotation and explanations to measurement results and

test reports.

• Track readings on a single channel through the Monitor toolbar.

• Enter information into the Event Log automatically or manually

while acquiring measurement data or during post-scan analysis.

• Print scan setups, event logs, and graphics.

• Communicate with the instrument using GPIB, RS-232, modem,

or LAN (using a LAN-to-GPIB gateway).

PC for gathering

To install the software, refer to “Installing BenchLink Data Logger Software” on page 18.

To learn more about the software and its capabilities, refer to the On-Line Help System for BenchL ink Data Logger.

The Plug-In Modules at a Glance

For complete s pecifications on each plug-in module, refer to the module sections in chapter 9.

34901A 20-Channel Armature Mu ltip le xer

• 20 channels of 300 V switching

• Two channels for DC or AC current measurements (100 nA to 1A)

• Built-in thermocouple reference junction

• Switching speed of up to 60 channels per second

• Connects to the internal multimeter

• For detailed information and a module diagram, see page 164.

Each of the 20 channels switches both fully isolated inputs to the internal multimeter. The module is divided into two banks of 10 two-wire channels each. When making four-wire resistance measurements, channels from Bank A are automatically paired with channels from Bank B. Two additional fused channels are included on the module (22 channels total) for making calibrated

AC current measurements with the internal multimeter (external shunt

resistors are not required). You can close multiple channels on this module only if you have not configured any channels to be part of the scan list. Otherwise, all channels on the module are break-before-make.

HI and LO inputs, thus providing

DC or

34902A 16-Channel Reed Mult iple xer

• 16 channels of 300 V switching

• Built-in thermocouple reference junction

• Switching speed of up to 250 channels per second

• Connects to the internal multimeter

• For detailed information and a module diagram, see page 166.

Use this module for high-speed scanning and high-throughput automated test applications. Each of the 16 channels switches both

HI and LO inputs, thus providing fully isolated inputs to the internal

multimeter. The module is divided into two banks of eight two-wire channels each. When making four-wire resistance measurements, channels from Bank A are automatically paired with channels from Bank B. You ca n cl ose mu lt ipl e c ha nn els on t h is modul e only if you have not configured any channels to be part of the scan list. Otherwi se, all channels on the module are break-before-make.

34903A 20-Channel Actuator / G eneral-Purpose Switch

• 300 V, 1 A actuation and switching

• SPDT (Form C) latching relays

• Breadboard area for custom circuits

• For detailed information and a module diagram, see page 168.

Use this module for those applications that require high-integrity contacts or quality connections of non-multiplexed signals. This module can switch 300 V, 1 A (50 W maximum switch power) to your device under test or to actuate external devices. Screw terminals on the module provide access to the Normally-Open, Normally-Closed, and Common contacts for each of the 20 switches. A breadboard area is provided near the screw terminals to implement custom circuitry, such as simple filters, snubbers, or voltage dividers.

34904A 4x8 Two-Wire Matri x S witch

• 32 two-wire crosspoints

• Any combination of inputs and outputs can be connected at a time

• 300 V, 1 A switching

• For detailed information and a module diagram, see page 170.

Use this module to connect multiple instruments to multiple points on your device under test at the same time. You can connect rows and columns between multiple modules to build larger matrices such as 8x8 and 4x16, with up to 96 crosspoints in a single mainframe.

34905/6A Dual 4-Channel RF Multiplexers

• 34905A (50Ω) / 34906A (75Ω)

• 2 GHz bandwidth with on-board SMB connections

• 1 GHz bandwidth with SMB-to-BNC adapter cables provided

• For detailed information and a module diagram, see page 172.

These modules offer wideband switching capabilities for high frequency and pulsed signals. Each module is organized in two independent banks of 4-to-1 multiplexers. Both modules offer low crosstalk and excellent insertion loss performance. To create larger cascade multiple banks together. Only one channel in each bank may be closed at a time.

RF multiplexers, you can

34907A Multifunction Module

• Two 8-bit Digital Input/Output ports, 400 mA sink, 42 V open collector

• 100 kHz Totalize input with 1 Vpp sensitivity

• Two ±12 V Calibrated Analog Outputs

• For detailed information and module block diagrams, see page 174.

Use this module to sense status and control external devices such as solenoids, power relays, and microwave switches. For greater flexibility, you can read digital inputs and the count on the totalizer during a scan.

34908A 40-Channel Single- End ed Mu ltip le xer

• 40 channels of 300 V single-ended (common LO) switching

• Built-in thermocouple reference junction

• Switching speed of up to 60 channels per second

• Connects to the internal multimeter

• For detailed information and a module diagram, see page 176.

Use this module for high-density switching applications which require single-wire inputs with a common to ensure that only one relay is connected at any time.

LO. All relays are break-before-make

In This Book

Quick Start Chapter 1 helps you get familiar with a few of the instrument’s front-panel features. This chapter also shows how to install the BenchLink Data Logger software.

Front-Panel Overview Chapter 2 introduces you to the front-panel menus and describes some of the instrument’s menu features.

System Overview Chapter 3 gives an overview of a data acquisition system and describes how parts of a sy stem work together.

Features and Functions Chapter 4 gives a detailed description of the instrument’s capabilities and operation. You will find this chapter useful whether you are operating the instrument from the front panel or over the remote interface.

Remote Interface Reference Chapter 5 contains reference information to help you program the instrument over the remote interface using the

Error Messages Chapter 6 lists the error messages that may appear as you are working with the instrument. Each listing contains enough information to help you diagnose and solve the problem.

SCPI language.

Application Programs Chapter 7 contains several remote interface program examples to help you develop programs for your application.

Tutorial Chapter 8 discusses measurement considerations and techniques to help you obtain the best accuracies and reduce sources of measurement noise.

Specifications Chapter 9 lists the technical specifications for the mainframe and plug-in modules.

If you have questions relating to the operation of the 34970A, call 1-800-452-4844 in the United States, or contact your nearest Agilent Technologies Sales Office.

If your 34970A fails within three year s of original purchase, Agile nt will either repair or replac e it free of charge. C all 1-877-447-7278 and ask for “Express Exchange” or contact your local Agilent office.

Contents

Chapter 1 Quick Start

To Prepare the Instrument for Use 17 Installing BenchLink Data Logger Software 18 To Connect Wiring to a Module 20 To Set the Time and Date 22 To Configure a Channel for Scanning 23 To Copy a Channel Configuration 25 To Close a Channel 26 If the Instrument Does Not Turn On 27 To Adjust the Carrying Handle 29 To Rack Mount the Instrument 30

Chapter 2 Front-Panel Overview

Front-Pa nel Menu Reference 35 To Monitor a Single Ch an ne l 37 To Set a Scan Interval 38 To Apply Mx+B Scaling to Measurements 39 To Configure Alarm Limits 40 To Read a Digital Input Port 42 To Write to a Digital Output Port 43 To Read the Totalizer Count 44 To Output a DC Voltage 45 To Configure the Remote Interface 46 To Store the Instr u me nt S tat e 48

Chapter 3 System Overv iew

Data Acquisition System Overview 50 Signal Routing and Switching 57 Measurement Input 60 Control Output 67

Contents

Chapter 4 Features and Functions

SCPI Language Conventions 73 Scanning 74 Single-Channel Monit oring 93 Scanning With Extern al Ins tr um ent s 95 General Measurement Configuration 98 Temperature Measurement Configuration 106 Voltage Measurement Configuration 113 Resistance Meas ure me nt Con f iguration 115 Current Measurement Configuration 116 Frequency Measure ment Configuration 118 Mx+B Scaling 119 Alarm Limits 122 Digital Input Operations 133 Totalizer Operations 135 Digital Output Operations 138 DAC Output Operations 139 System-Related Operations 140 Remote Interface Configuration 150 Calibration Overview 155 Factory Reset State 160 Instrument Pr es et S tat e 161 Multiplexer Module Default Settings 162 Module Overvi ew 163 34901A 20-Channe l Mu lti p le xer 164 34902A 16-Channe l Mu lti p le xer 166 34903A 20-Channe l Ac tuator 168 34904A 4x8 Matrix Sw it ch 170 34905A/6A Dual 4-Channel RF Multiplexers 172 34907A Multifunction Module 174 34908A 40-Channel Sin g le -Ende d Mul t ipl exe r 176

Contents

Chapter 5 Remote Interface Reference

SCPI Command Summary 181 Simplified Programming Overview 201 The MEASure? and CONFigure Commands 207 Setting the Function, Range, and Resolution 214 Temperature Configuration Commands 219 Voltage Configuration Commands 223 Resistance Configuration Commands 224 Current Configuration Commands 224 Frequency Configuration Commands 225 Scanning Over v i ew 226 Single-Channel Monitori ng Overview 237 Scanning With an Externa l In str u me nt 239 Mx+B Scaling Overview 244 Alarm System O v er v i ew 247 Digital Input Commands 255 Totalizer Commands 256 Digital Output Commands 258 DAC Output Commands 2 58 Switch Control Commands 259 State Storage Commands 261 System-Related Commands 264 Interface Configuration Commands 269 RS-232 Interface Configuration 270 Modem Communications 274 The SCPI Status System 275 Status System Comma nds 286 Calibration Commands 292 Service-Related Commands 294 An Introduction to the SCPI Language 296 Using Device Clear 302

Contents

Chapter 6 Error Messages

Execution Errors 305 Instrument Errors 309 Self-Test Errors 314 Calibration Errors 315 Plug-In Module Errors 317

Contents

Chapter 7 A ppl ic ation Programs

Example Programs for Excel 7.0 321 Example Programs for C and C++ 328

Chapter 8 Tuto rial

System Cabling and Connections 335 Measurement Fundamentals 343 Low-Level Signal Multiplexing 378 Actuators and G en er a l-P u r p os e S w it ching 384 Matrix Switch ing 388 RF Signal Multiplexing 390 Multifunction Mo d ul e 392 Relay Life and Preventative Maintenance 399

Chapter 9 Specifi cations

DC, Resistance, and Temperature Accuracy Specifications 404 DC Measurement and Operating Charact eristics 405 AC Accuracy Specifications 406 AC Measurement and Operating Cha racteristics 407 Measurement Rate s an d Sys t em Char a c ter i sti c s 408 Module Specifications 409 BenchLink Data Logger Software Specifications 412 Product and Module Dimensions 413 To Calculate Total Measurement Error 414 Interpreting Internal DMM Specifications 416 Configuring for Highest Accuracy Measurements 419

Index

Quick Start

One of the first things you will want to do with your instrument is to become acquainted with the front panel. We have written the exercises in this chapter to prepare the instrument for use and help you get familiar with some of its front-panel operations.

The front panel has several groups of keys to select various functions and operations. A few keys have a shifted function printed in blue below

the key. To perform a shifted function, press (the will turn on). Then, press the key that has the desired label below it.

For example, to select the Utility Menu, press .

SHIFT annunciator

If you accidentally press , just press it again to turn off the annunciator.

This chapter is divided into the following sections:

• To Prepare the Instrume nt for Use, on page 17

• Installing BenchLink Data Logger Software, on page 18

• To Connect Wiring to a Module, on page 20

• To Set the Time and Date, on page 22

• To Configure a Channel for Scanning, on page 23

• To Copy a Channel Configuration, on page 25

• To Close a Ch annel, on page 26

• If the Instrument Does Not Turn On, on page 27

• To Adjust the Carrying Handle, on page 29

• To Rack Mount the Instrument, on page 30

SHIFT

Chapter 1 Quick Start

To Prepare the Instrument for Use

1 Check the list of supplied items.

Verify that you have received the following items with your instrument. If anything is missing, contact your nearest Agilent Technologies Sales Office.

One power cord. This User’s Guide. One Service Guide. One Quick Reference Guide. Certificate of Calibration (if you ordered the internal DMM). Quick Start Package (if you ordered the internal DMM):

• One RS-232 cable.

• BenchLink Data Logger Software CD-ROM.

To install the software, see page 18.

• One J-type thermocouple and a flatblade screwdriver.

Any plug-in modules that you ordered are delivered in a separate shipping container.

On/Standby Switch

WARNING

Note that this switch

Standby only.

is To disconnect t he mains from the instrumen t, remove the power cord.

2 Connect the power cord and turn on the instrument.

The front-panel display will light up briefly while the instrument performs its power-on self-test. The

GPIB address is also displayed.

The instrument initially powers up with all measurement channels turned off. To review the power-on display with all annunciators

turned on, hold down as you turn on the instrument. If the

instrument does not turn on properly, see p age 27.

3Perform a complete self-test.

The complete self-test performs a more extensive set of tests than those performed at power-on. Hold down as you turn on the instrument

and hold down the ke y until you hear a long beep. The self-test will begin when you release the key following the beep.

If the self-test fails, see the 34970A Se rvice Guide for instructions on returning the instrument to Agilent for service.

Chapter 1 Quick Start

Installing BenchLink Data Logger Software

If you ordered the 34970A with the internal DMM, then the BenchLink Data Logger software is included. The software is shipped on one

CD-ROM, but includes a utility to build installation floppy disks.

To install the software on your of free disk space.

For system requirements and additional details on the features of the software, refer to the specifications in chapter 9.

Installation Procedure

PC, you will need a minimum of 12 MB

If you are running Windows 95 or Windows NT 4.0

1. Insert the CD-ROM into your drive.

2. Select the

3. Select the sheet. Click on

If you are running Windows

1. Insert the

2. Select

3. Type <drive>

CD-ROM drive. Click OK to continue and follow the on-screen

Settings | Control Panel from the Start menu. Double-click on

Add/Remove Programs icon.

Install/Uninstall tab on the Add/Remove Programs property

Install and follow the on-screen instructions.

3.1

CD-ROM into your drive.

File | Run from the Program Manager menu bar.

:\setup, where drive is the letter representing your

instructions.

Chapter 1 Quick Start

Installing BenchLink Data Logger Software

Creating Installation Floppy Disks

You have the option to create an installation on floppy disks from the

CD-ROM installation utility. This utility is provided so that you can

install BenchLink Data Logger on a computer that does not have a

CD-ROM drive.

Note: You will need a total of five (5) formatted floppy disks to create an installation.

1. Go to a computer that is equipped with a

2. Start the installation procedur e as described on the previous page.

3. Select procedures and follow the on-screen instructions.

Create disks... on the initial display of the installation

CD-ROM drive.

On-Line Help System

The software is shipped with an extensive on-line Help system to help you learn the features of the software as well as troubleshoot any problems that might arise as you are using t he software. As you are installing the software, you will notice that the on-line Help system is available in several languages.

Chapter 1 Quick Start

To Connect Wiring to a Module

1 Remove the module cover.

3 Route wiring through strain relief.

2 Connect wiring to the screw terminals.

20 AWG

Typical

6 mm

4 Replace the module cover.

Cable Tie Wrap

(optional)

5 Install the module into mainframe.

Channel Number:

Slot Channel

Wiring Hints...

• For detailed informat io n on eac h mo du le , refer to the section starting on page 16 3.

• To reduce wear on the internal DMM relays, wire like functions on adjacent chan ne ls .

• For information on grounding and shielding, see page 335.

• The diagrams on the next page show how to connect wiring to a mult ip le xe r mod ul e fo r each measurement function.

Chapter 1 Quick Start

To Connect Wiring to a Module

DC Voltage / AC Voltage / Frequency Thermocouple

Thermocouple Types: B, E, J, K, N, R, S, T

See page 351 for thermocouple color codes.

Ranges: 100, 1 k, 10 k, 100 k, 1 M, 10 M, 100 MΩ RTD Types: 0.00385, 0.00391 Thermistor Types: 2.2 k, 5 k, 10 k

DC Current / AC Current

Ranges: 100 mV, 1 V, 10 V, 100 V, 300 V

4-Wire Ohms / RTD 2-Wire Ohms / RTD / Thermistor

Channel n (source) is automatically paired with Channel n+10 (sense) on the 34901A or Channel n+8 (sense) on the 34902A.

Valid only on channels 21 and 22 on the 34901A.

Ranges: 10 mA, 100 mA, 1A

Ranges: 100, 1 k, 10 k, 100 k, 1 M, 10 M, 100 MΩ RTD Types: 0.00385, 0.00391

Chapter 1 Quick Start

To Set the Time and Date

All readings during a scan are automatically time stamped and stored in non-volatile memory. In addition, alarm data is time stamped and stored in a separate non-volatile memory queue.

Utility

1 Set the time of day.

Use and to select the field to modify and turn the knob to change the value. You can also edit the

AM/PM field.

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2 Set the date.

Use and to select the field to modify and turn the knob to change the value.

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Chapter 1 Quick Start

To Configure a Channel for Scanning

Any channel that can be “read” by the instrument can also be included in a scan. This includes readings on multiplexer channels, a read of a digital port, or a read of the count on a totalizer channel. Automated scanning is not allowed with the digital output, or voltage output (

1 Select the channel to be added to the sc an list.

Turn the knob until the desired channel is shown on the right side of front-panel display. The channel number is a three-digit number; the left-most digit represents the slot number (100, 200, or 300) and the two digits on the right indicate the channel number (102, 110, etc.).

Note: You can use and to skip to the beginning of the previous or next slot.

For this example, assume that you have the 34901A multiplexer installed in slot 100 and select channel 103.

RF multiplexer, matrix, actuator,

DAC) modules.

2 Select the measurement parameters for the selected channel.

Use the knob to scroll through the measurement choices on each level of the menu. When you press to make your selection, the menu

automatically guides you through all relevant choices to configure a measurement on the selected function. When you have finished configuring the parameters, you are automatically exited from the menu.

The current selection (or default) is displayed in full bright for easy identification. When you make a different selection, the new choice is shown in full bright and it becomes the default selection. The order of the choices always remains the same; however, you always enter the menu at the current (full bright) setting for each parameter.

Note: The menu will timeout after about 20 seconds of inactivity and any changes made previously will take effect.

For this example, con fi gur e ch a nne l 103 to mea sur e a J -type therm oc ouple with 0.1

°C of display resolution.

Chapter 1 Quick Start

To Configure a Channel for Scanning

Note: Press to sequentially step through the scan list and take a measurement on each channel (readings are not stored in memory). This is an easy way to verify your wiring connections before initiating the scan.

3 Run the scan and stor e the re ad ing s i n non- vo l at ile memo ry.

The instrument automatically scans the configured channels in consecutive order from slot 100 through slot 300 (the

SCAN annunciator

turns on). Channels that are not configured are skipped during the scan. In the default configuration, the instrument continuously scans the configured channels at a 10-second interval.

Press and hold to stop the scan.

4 View the data f rom t he scan.

All readings taken during a scan are automatically time stamped and stored in non-volatile memory. During the scan, the instrument calculates and stores the minimum, maximum, and average on all channels in the scan list. You can read the contents of memory at any time, even during a scan.

From the front panel, data is available for the last 100 readings on each channel readings taken during a scan (all of the data is available from the remote interface). From the View menu, select

READINGS and press

again. Then press and to choose the data you want to view

for the selected channel as shown in the table below.

and

Select Channel Last Reading on Channel

Time of Last Reading Minimum Reading on Channel Time of Minimum Reading Maximum Reading on Channel Time of Maximum Reading Average of Readings on Channel Second Most Recent Reading on Channel Third Most Recent Reading on Channel

99th Most Recent Reading on Channel

Chapter 1 Quick Start

To Copy a Channel Configuration

After configuring a channel to be included in the scan list, you can copy that same configuration to other channels in the instrument (including digital channels on the multifunction module). This feature makes it easy to configure several channels for the same measurement. When you copy the configuration from one channel to another, the following parameters are automatically copied to the new channel:

• Measurement configuration

• Mx+B scaling configuration

• Alarm configuration

• Advanced measurement configuration

1 Select the channel to copy the conf ig uratio n from.

Turn the knob until the desired channel is shown on the right side of front-panel display. For this example, let’s copy the configuration from channel 103.

2 Select the copy function.

Use the knob to scroll through the measurement choices until you see

COPY CONFIG. When you press to make your selection, the menu

automatically guides you to the next step.

3 Select the channel to copy the conf ig uratio n to.

Turn the knob until the desired channel is shown on the right side of front-panel display. For this example, let’s copy the configuration to channel 105.

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4 Copy the channel configuration to the selected cha nnel.

Note: To copy the same configuration to other channels, repeat this procedure.

Chapter 1 Quick Start

To Close a Channel

On the multiplexer and switch modules, you can close and open individual relays on the module. However, note that if you have already configured any multiplexer channels for scanning, you cannot independently close and open individual relays on that module.

1 Select the channel.

Turn the knob until the desired channel is shown on the right side of front-panel display. For this example, select channel 213.

2 Close the selected channel.

3 Open the selected channel.

Note: will sequentially open all channels on the module in the selected slot.

The table below shows the low-level control operations available for each of the plug-in modules.

Plug-In Module

34901A 20-Channel Mux 34902A 16-Channel Mux 34908A 40-Channel Single-Ended Mux 34903A 20-Channel Actuator 34904A 4x8 Matrix 34905A Dual 4-Channel RF Mux (50Ω) 34906A Dual 4-Channel RF Mux (75 34907A Multifun ction Module (DIO) 34907A Multifunction Module (Totalizer) 34907A Multifunction Module (DAC)

[1] Only one channel can be closed at a time on this module. [2] Only one channel in each bank can be closed at a time on this module.

Ω)

•••

[1]

[2] [2]

•••

••• •

••

•

•• •

••

•

Chapter 1 Quick Start

If the Instrument Does Not Turn On

Use the following steps to help solve problems you might encounter when turning on the instrument. If you need more help, refer to the 34970A Service Guide for instructions on returning the instrument to Agilent for service.

1 Verify that there is ac power to the instrument.

First, verify that the power cord is firmly plugged into the power receptacle on the rear panel of the instrument. You should also make sure that the power source you plugged the instrument into is energized. Then, verify that the instrument is turned on.

The On/Standby switch is located on the lower left side of the front panel.

2 Verify the powe r -li ne voltage setting.

The line voltage is set to the proper value for your country when the instrument is shipped from the factory. Change the voltage setting if it is not correct. The settings are: 100, 120, 220, or 240 Vac.

Note: For 127 Vac operation, use the 120 Vac setting. For 230 Vac operation, use the 220 Vac setting.

See the next page if you need to change the line voltage setting.

3 Verify that the po wer-line fuse is good .

The instrument is shipped fr om the fact ory with a 50 0 mA fuse inst alled. This is the correct fuse for all line voltages.

See the next page if you need to replace the power-line fuse.

To replace the 500 mAT, 250 V fuse, order Agilent part number 2110-0458.

Chapter 1 Quick Start

If the Instrument Does Not Turn On

1 Remove the power cord. Remove the fuse-holder assembly from the rear panel.

3 Rotate the line-voltage selector until the

correct voltage appears in the window.

2 Remove the line-voltage selector from

the assembly.

Fuse: 500 mAT (for all line voltages) Agilent Part Number: 2110-0458

4 Replace the fuse-holder assembly in the rear panel.

100, 120 (127), 220 (230) or 240 Vac

Verify that the correct line voltage is selected and the power-line fuse is good.

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