用户手册目录Contents12Title Page1HP 34970A Overview2The Front Panel at a Glance3The Front-Panel Menus at a Glance4Display Annunciators5The Rear Panel at a Glance6HP BenchLink Data Logger Software at a Glance7The Plug-In Modules at a Glance8HP 34901A 20-Channel Armature Multiplexer8HP 34902A 16-Channel Reed Multiplexer8HP 34903A 20-Channel Actuator / General-Purpose Switch9HP 34904A 4x8 Two-Wire Matrix Switch9HP 34905/6A Dual 4-Channel RF Multiplexers9HP 34907A Multifunction Module10HP 34908A 40-Channel Single-Ended Multiplexer10In This Book11Chapter 1: Quick Start16To Prepare the Instrument for Use18Installing HP BenchLink Data Logger Software19Installation Procedure19Creating Installation Floppy Disks20On-Line Help System20To Connect Wiring to a Module21To Set the Time and Date23To Configure a Channel for Scanning24To Copy a Channel Configuration26To Close a Channel27If the Instrument Does Not Turn On28To Replace the Power-Line Fuse29To Adjust the Carrying Handle30To Rack Mount the Instrument31Chapter 2: Front-Panel Overview33Front-Panel Menu Reference35To Monitor a Single Channel37To Set a Scan Interval38To Apply Mx+B Scaling to Measurements39To Configure Alarm Limits40To Read a Digital Input Port42To Write to a Digital Output Port43To Read the Totalizer Count44To Output a DC Voltage45To Configure the Remote Interface46HP-IB Configuration46RS-232 Configuration47To Store the Instrument State48Chapter 3: System Overview49Data Acquisition System Overview50The Computer and Interface Cable51Measurement Software52The HP 34970A Data Acquisition / Switch Unit53Plug-In Modules54System Cabling55Transducers and Sensors56Alarm Limits56Signal Routing and Switching57Measurement Input60The Internal DMM60Scanning62Scanning With External Instruments64The Multifunction Module65Control Output67The Multifunction Module67The Actuator / General-Purpose Switch69Chapter 4: Features and Functions70SCPI Language Conventions72Rules for Using a Channel List72Scanning73Rules for Scanning73Power Failure76Adding Channels to a Scan List77Scan Interval79Interval Scanning79Scan Once81External Scanning82Scanning on Alarm83Scan Count85Reading Format86Channel Delay87Automatic Channel Delays88Viewing Readings Stored in Memory89Single-Channel Monitoring92Scanning With External Instruments94General Measurement Configuration97Measurement Range97Measurement Resolution99Custom A/D Integration Time102Autozero104Temperature Measurement Configuration105Measurement Units105Thermocouple Measurements106RTD Measurements109Thermistor Measurements111Voltage Measurement Configuration112DC Input Resistance112AC Low Frequency Filter113Resistance Measurement Configuration114Offset Compensation114Current Measurement Configuration115AC Low Frequency Filter115Frequency Measurement Configuration117Low Frequency Timeout117Mx+B Scaling118Alarm Limits121Viewing Stored Alarm Data125Using the Alarm Output Lines127Using Alarms With the Multifunction Module129Digital Input Operations132Totalizer Operations134Digital Output Operations137DAC Output Operations138System-Related Operations139State Storage139Error Conditions141Self-Test142Display Control143Real-Time System Clock144Internal DMM Disable144Firmware Revision Query145Relay Cycle Count146SCPI Language Version Query148Remote Interface Configuration149HP-IB Address149Remote Interface Selection150Baud Rate Selection (RS-232)151Parity Selection (RS-232)151Flow Control Selection (RS-232)152Calibration Overview154Calibration Security154To Unsecure for Calibration155To Secure Against Calibration156To Change the Security Code156Calibration Message157Calibration Count158Factory Reset State159Instrument Preset State160Multiplexer Module Default Settings161Module Overview162HP 34901A 20-Channel Multiplexer163HP 34902A 16-Channel Multiplexer165HP 34903A 20-Channel Actuator167HP 34904A 4x8 Matrix Switch169HP 34905A/6A Dual 4-Channel RF Multiplexers171HP 34907A Multifunction Module173HP 34908A 40-Channel Single-Ended Multiplexer175Chapter 5: Remote Interface Reference177SCPI Command Summary179Rules for Using a Channel List179Rules for Using scan_list and ch_list Parameters180Scan Measurement Commands181Monitor Commands181Scan Configuration Commands182Scan Statistics Commands183Scan Memory Commands183Scanning With an External Instrument184Temperature Configuration Commands185Voltage Configuration Commands186Resistance Configuration Commands187Current Configuration Commands188Frequency and Period Configuration Commands189Mx+B Scaling Commands190Alarm Limit Commands191Digital Input Commands192Totalizer Commands192Digital Output Commands193DAC Output Commands193Switch Control Commands193Scan Triggering Commands194State Storage Commands194System-Related Commands195Interface Configuration Commands196Status System Commands196Calibration Commands197Service-Related Commands197IEEE 488.2 Common Commands198Simplified Programming Overview199Using the MEASure? Command200Example: Using MEASure?203Using the CONFigure Command200Example: Using CONFigure With READ?203Example: Using CONFigure With INITiate and FETCh?204Using the range and resolution Parameters201Using the READ? Command202Example: Using CONFigure With READ?203Using the INITiate and FETCh? Commands202Example: Using CONFigure With INITiate and FETCh?204The MEASure? and CONFigure Commands205MEASure? Command Syntax205CONFigure Command Syntax209Setting the Function, Range, and Resolution212Temperature Configuration Commands217General Temperature Commands217Thermocouple Commands218RTD Commands220Thermistor Commands220Voltage Configuration Commands221Resistance Configuration Commands222Current Configuration Commands222Frequency Configuration Commands223Scanning Overview224Rules for Scanning224Scan Interval225Scanning Commands226Reading Format Commands229Scan Statistics Commands231Scan Memory Commands233Single-Channel Monitoring Overview235Scanning With an External Instrument237Mx+B Scaling Overview242Mx+B Scaling Commands243Alarm System Overview245Alarm Limit Commands248Alarm Output Commands250Digital I/O Alarm Commands251Digital Input Commands253Totalizer Commands254Digital Output Commands256DAC Output Commands256Switch Control Commands257State Storage Commands259System-Related Commands262Interface Configuration Commands267RS-232 Interface Configuration268RS-232 Configuration Overview268RS-232 Flow Control Modes269RS-232 Data Frame Format270Connection to a Computer or Terminal270RS-232 Troubleshooting271Modem Communications272The SCPI Status System273What is a Condition Register?273What is an Event Register?273What is an Enable Register?273HP 34970A Status System274The Status Byte Register275Using Service Request (SRQ) and Serial Poll276Using *STB? to Read the Status Byte276Using the Message Available Bit (MAV)277To Interrupt Your Bus Controller Using SRQ277To Determine When a Command Sequence is Completed277The Questionable Data Register278The Standard Event Register280The Alarm Register282The Standard Operation Register283Status System Commands284Status Byte Register Commands284Questionable Data Register Commands285Standard Event Register Commands286Alarm Register Commands287Standard Operation Register Commands288Miscellaneous Status Register Commands289Calibration Commands290Service-Related Commands292An Introduction to the SCPI Language294Command Format Used in This Manual295Command Separators296Using the MIN and MAX Parameters296Querying Parameter Settings297SCPI Command Terminators297IEEE-488.2 Common Commands297SCPI Parameter Types298Numeric Parameters298Discrete Parameters298Boolean Parameters298String Parameters299Channel List Parameters299Using Device Clear300Chapter 6: Error Messages301Execution Errors303Instrument Errors307Self-Test Errors312Calibration Errors313Plug-In Module Errors315Chapter 7: Application Programs316Example Programs for Excel 7.0318Example Programs for C and C++325Chapter 8: Tutorial329System Cabling and Connections331Cable Specifications331Grounding Techniques333Shielding Techniques334Separation of High-Level and Low-Level Signals334Sources of System Cabling Errors335Radio Frequency Interference335Thermal EMF Errors336Noise Caused by Magnetic Fields336Noise Caused by Ground Loops337Low-Level AC Measurement Errors338Measurement Fundamentals339The Internal DMM339Temperature Measurements341RTD Measurements342Thermistor Measurements342Thermocouple Measurements343Thermocouple Types347Sources of Error in Thermocouple Measurements348Reference Junction Error348Diffusion Error348Shunt Impedance349Shielding349Calculation Error349DC Voltage Measurements350Signal Conditioning for DC Measurements350Sources of Error in DC Voltage Measurements351Common Mode Rejection351Noise Caused by Injected Current352Loading Errors Due to Input Resistance353Loading Errors Due to Input Bias Current354AC Voltage Measurements355Signal Conditioning for AC Measurements355True RMS AC Measurements356Making High-Speed AC Measurements357Sources of Error in AC Voltage Measurements358Crest Factor Errors (non-sinusoidal inputs)358Example: Calculating Measurement Error359AC Loading Errors360Low-Level AC Measurement Errors361Measurements Below Full Scale362Temperature Coefficient and Overload Errors362Current Measurements363Sources of Error in DC Current Measurements364Sources of Error in AC Current Measurements364Resistance Measurements3654-Wire Ohms Measurements365Offset Compensation367Sources of Error in Resistance Measurements368External Voltages368Settling Time Effects368High-Resistance Measurement Errors368Strain Gage Measurements369Stress369Strain Sensors370Common Uses for Strain Gages370Making Strain Gage Measurements371Temperature Effects371Frequency and Period Measurements372Sources of Error in Frequency and Period Measurements373Low-Level Signal Multiplexing and Switching374One-Wire (Single-Ended) Multiplexers375Two-Wire Multiplexers375Four-Wire Multiplexers376Signal Routing and Multiplexing377Sources of Error in Multiplexing and Switching378Actuators and General-Purpose Switching380Snubber Circuits381RC Protection Networks381Using Varistors382Using Attenuators383Matrix Switching384Combining Matrices385RF Signal Multiplexing386Sources of Error in RF Switching387Multifunction Module388Digital Input388Digital Output389Using an External Pull-Up390Driving External Switches390Totalizer391Totalizer Errors392Voltage (DAC) Output393DAC Errors394Relay Life and Preventative Maintenance395Relay Life396Relay Load396Switching Frequency397Replacement Strategy397Chapter 9: Specifications398DC, Resistance, and Temperature Accuracy Specifications399DC Measurement and Operating Characteristics400AC Accuracy Specifications401AC Measurement and Operating Characteristics402Measurement Rates and System Characteristics403Module Specifications404Typical AC Performance Graphs406Software Specifications407Product and Module Dimensions408To Calculate Total Measurement Error409Understanding the “ % of reading ” Error409Understanding the “ % of range ” Error410Total Measurement Error410Example: Computing Total Measurement Error410Interpreting Internal DMM Specifications411Number of Digits and Overrange411Sensitivity411Resolution412Accuracy41224-Hour Accuracy41390-Day and 1-Year Accuracy413Temperature Coefficients413Configuring for Highest Accuracy Measurements414Declaration of Conformity428Warranty Information429Index415文件大小: 9.5 MB页数: 429Language: English打开用户手册