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Fluke 2620A, 2625A user manual Operating the Instrument from the Front Panel, Chapter, Title

Models: 2625A 2620A

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Page 43

Chapter 3

Operating the Instrument from the Front Panel

Title	Page
Introduction	3-3
Operating Modes	3-3
Other Displayed Data	3-4
What is the Present Configuration?	3-4
If Power is Interrupted	3-4
If the Configuration is Reset	3-4
Channel Configuration	3-4
Selecting Channel, Function, and Range	3-4
Setting Alarms	3-9
Alarm Limits	3-9
Alarm Indications	3-10
Resetting Alarm Conditions	3-11
Using the Digital I/O Lines	3-11
Mx+B Scaling	3-12
Instrument Configuration	3-14
Entering and Changing Numeric Values	3-14
Selecting Scan Interval	3-15
Selecting the Measurement Rate	3-15
Triggering	3-16
External Triggering	3-16
Changing the Temperature Unit	3-16
Setting Date and Time of Day	3-17
Measurement Connections	3-17
DC Volts, AC Volts, Frequency, and Thermocouples	3-18
Resistance and RTD	3-20
Totalizing	3-22
General	3-22
Connections	3-22
Review Array	3-22
List Button Functions	3-23
Autoprint	3-25
Memory Storage	3-25
Front Panel Lock out Conditions	3-26

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Page 43

Image 43

Fluke 2620A, 2625A user manual Operating the Instrument from the Front Panel, Chapter, Title, Using the Digital I/O Lines

Contents

Users Manual 2620A/2625AHydra Series II Data Acquisition Unit Hydra Series II Data Logger 5/94 LIMITED WARRANTY & LIMITATION OF LIABILITYOverview Table of ContentsTitle Introduction2620A/2625A Using the Computer InterfaceOperating the Instrument from the Front Panel Additional Considerations Using the IEEE-488 InterfaceComputer Interface Command Set Using Shielded WiringIndex Maintenance2620A/2625A AppendicesTitle List of TablesAmendment 1 IPTS-68 Performance Tests for RTD Temperature Function DIN/IEC 751 Amendment2620A/2625A Performance Tests Voltage, Resistance, and FrequencyHydra DB-9 to PC DB-9 RS-232 Connection Generic List of FiguresTitle 4-Terminal Connections to Decade Resistance Boxviii Interference InformationDeclaration of the Manufacturer or Importer Bescheinigung des Herstellers/Importeurs∙ Remove inputs from live voltages before opening the input module Safety Terms in this ManualSymbols Marked on Equipment To avoid electric shock2620A/2625A AC Power SourceDC Power Source Use the Proper Power CordThe Basics Getting StartedSetting Up a Channel IntroductionSelecting the Scan Data Destination 2620A/2625AGetting Started continued Taking MeasurementsPress Mto activate the Monitor function 2620A/2625AViewing Minimum, Maximum, and Last Data Values oo24f.eps LAST MIN MAX LAST MIN MAXUsers Manual 2620A/2625APage IntroductionChapter TitleUsers Manual 2620A, 2625AIEEE-488 Interface Assembly Options and AccessoriesThe Hydra Series II Data Acquisition Unit The Hydra Series II Data Logger2620A, 2625A Table 1-1. Hydra FeaturesIntroduction Where to go From HereAccessories Where to go From HereChapter 1 Introduction Chapter 4 Using the Computer InterfaceChapter 6 Maintenance Getting StartedChapter OverviewTitle Users Manual 2620A, 2625AUnpacking and Inspecting the Instrument Setting Up the InstrumentIntroduction Adjusting the HandleFront/Rear Panel Features Line PowerOverview Setting Up the InstrumentFigure 2-2. Front Panel Figure 2-4. Right Display Figure 2-3. Left DisplayFigure 2-5. Annunciators Overview Setting Up the InstrumentTable 2-1. Display Annunciators Table 2-1. Display Annunciators cont 2620A, 2625AFigure 2-6. Rear View Turning the Instrument On Operating ModesInput Channels Right Display Front Panel DisplayReading the Display Left DisplayUsing the Buttons Front Panel ButtonsSelecting a Channel N O L K Setting up a ChannelSetting up a Channel Alarm Limits Setting Alarm Limits and Mx+B Scaling ValuesMx+B Scaling Setting the Scan IntervalUsing the Scan Function Using the Monitor FunctionReviewing Channel Data Viewing the Totalizer Count Using External DC Power2620A, 2625A Using the Rack Mount KitSetting Date and Time of Day Operating the Instrument from the Front PanelUsing the Digital I/O Lines Changing the Temperature UnitComputer Interface-Initiated Lockouts 2620A, 2625AFront Panel Review Only Function Front Panel Monitor Only FunctionOperating Modes Configuration ModeFigure 3-1. Configuration Mode IntroductionIf Power is Interrupted What is the Present Configuration?Channel Configuration Other Displayed DataChannels 4-20 assigned to digital I/O lines 4-7, as follows Table 3-1. Configuration Reset Settingscleared for all channels Page Operating the Instrument from the Front Panel Channel Configuration2620A, 2625A Operating the Instrument from the Front Panel Setting AlarmsAlarm Limits Channel ConfigurationGAGE Alarm IndicationsUsing the Digital I/O Lines Resetting Alarm ConditionsMx+B Scaling Table 3-8. Initial Alarm Assignments, Digital I/O Lines 4 ThroughB to define the scaling values Page Entering and Changing Numeric Values Instrument ConfigurationSelecting the Measurement Rate Selecting Scan IntervalTable 3-11. Measurement Rate Selection Changing the Temperature UnitTriggering External Triggering∙ Remove inputs from live voltages before opening the input module Measurement ConnectionsSetting Date and Time of Day To avoid electric shockDC Volts, AC Volts, Frequency, and Thermocouples Figure 3-2. Input Module Connections Operating the Instrument from the Front PanelMeasurement Connections STRAIN RELIEFResistance and RTD Measurement Connections Operating the Instrument from the Front PanelUSE H AND L TERMINALS FOR ANY CHANNEL CHANNEL 0 ON FRONT PANEL Connections TotalizingReview Array GeneralList Button Functions Note1 Table 3-16. List Button OperationMemory Storage AutoprintFront Panel Review Only Function Front Panel Lock out ConditionsFront Panel Monitor Only Function Calibration REM AnnunciatorComputer Interface-Initiated Lockouts Users Manual 2620A, 2625ATitle Using the Computer InterfaceInstalling the IEEE-488 Interface Chapter4-19 Service Request Enable RegisterComputer Interface Command Set Status Byte RegisterOtherwise, if a baud rate appears, the RS-232 interface is enabled Using the RS-232 Computer InterfaceTo determine which computer interface is enabled, select COMM K L. If IEEE appears on the display, the IEEE-488 interface is enabledSetting Communication Parameters RS-232 Autoprint Computer Interface Control Autoprint and Memory Storage RS-232Autoprint Output Format 5 -3.2345 mMX+B H/R12123.87 kOHMS/L1731.268VAC ALM15DIO204TOTAL0 Memory Storage Computer Interface ControlMemory Retrieval 07420102/09/91Clearing Memory Memory Full OperationCabling the Instrument to a Host or Printer RS-232 Character Echoing Installation TestDevice Clear Using Ctrl C RS-232 InformationRS-232 Prompts Using the IEEE-488 InterfaceSample Program Using the RS-232 Computer Interface Installing the IEEE-488 InterfaceFigure 4-2. Sample Program 2620A, 2625AUsing the IEEE-488 Interface Using the Computer InterfaceFigure 4-2. Sample Program cont Table 4-2. IEEE-488.1 Capabilities Description Table 4-3. IEEE-488 Setup BaudAddressEnabling the IEEE-488 Interface CapabilityInstallation Test General Information RS-232 and IEEE-488How the Instrument Processes Input Typical Input Strings Input StringsThe instrument stores received input in a 350-byte input buffer Input TerminatorsFUNC 12, TEMP, K Using the Computer InterfaceGeneral Information RS-232 and IEEE-488 FUNC 1, OHMS, 3Sending Input Strings to the Instrument Sending Numeric Values to the Instrument RS-232 and IEEE-488How the Instrument Processes Output Service Requests IEEE-488 only and Status Registers Output Queue 7 6 ESB2620A, 2625A Table 4-4. Status Byte Register Description Event Status and Event Status Enable RegistersStatus Byte Register NameReading the Status Byte Register Instrument Event Register Service Request Enable RegisterComputer Interface Command Set Computer Interface Command Set Using the Computer InterfaceTable 4-7. Command and Query Summary 2620A, 2625A Table 4-7. Command and Query Summary contComputer Interface Command Set Using the Computer InterfaceTable 4-7. Command and Query Summary cont 2620A, 2625A Table 4-8. Command and Query ReferenceComputer Interface Command Set Using the Computer InterfaceTable 4-8. Command and Query Reference cont 2620A, 2625A DOstate Using the Computer InterfaceComputer Interface Command Set limitnum =2620A, 2625A Return alarm limit data for specified channel and limitSet instrument calendar values Computer Interface Command Set Using the Computer Interface2620A, 2625A Table 4-8. Command and Query Reference contComputer Interface Command Set Using the Computer InterfaceIf the channel indicated is invalid, an Execution Error is generated. For valid channels, two or three comma-separated data fields are returned. One of the following function definitions is returned in the first data field 2620A, 2625A Table 4-8. Command and Query Reference contComputer Interface Command Set Using the Computer InterfaceLOCK LOCK? LOCS LOG? LOGGED? LOGBIN? LOGCLR LOGCOUNT? 2620A, 2625AComputer Interface Command Set Using the Computer InterfaceTable 4-8. Command and Query Reference cont Enables monitoring of given channel if monitoring Table 4-8. Command and Query Reference cont2620A, 2625A Computer Interface Command Set Using the Computer InterfaceNext Scan’s Values 2620A, 2625A Computer Interface Command Set Using the Computer Interface2620A, 2625A Table 4-8. Command and Query Reference contComputer Interface Command Set Using the Computer Interface2620A, 2625A Table 4-8. Command and Query Reference contComputer Interface Command Set Using the Computer InterfaceTOTAL TOTAL? TOTALDBNC TOTALDBNC? TRIGGER Trigger Type Query alarm2620A, 2625A TRIGGER?When Measuring Resistance or Temperature RTD Additional ConsiderationsExternal Trigger Enabled Type Monitor Alarm Enabled TypeUsers Manual 2620A, 2625AThese two additional trigger mechanisms are mutually exclusive Measurement RateAdvanced Trigger Mechanisms IntroductionExternal Trigger Enabled Type Both External and Monitor Alarms Disabled TypeREMS, a *TRG can be generated from the front panel by pressing Q Advanced Trigger Mechanisms Additional ConsiderationsThermal Voltages When Measuring Resistance or Temperature RTDMonitor Alarm Enabled Type Additional Considerations When Measuring Resistance or Temperature Rtdoo16f.eps Effects of Internal Noise in AC Measurements True RMS MeasurementsWaveform Comparison True RMS vs Average Responding Making Mixed Measurements Making Mixed MeasurementsFigure 5-3. Comparison of Common Waveforms 2620A, 2625ATO DISPLAY RMS FOR SINE WAVES WWarning Using Shielded WiringNon-Isolated Sensor Configuration Isolated and Shielded Sensor ConfigurationIn More Detail Chapter MaintenanceThermocouple Temperature Accuracy Test Dedicated Alarm Output TestUsers Manual 2620A, 2625AWhen the instrument is powered up, the entire display lights CleaningSelf-Test Diagnostics and Error Codes Line FusePerformance Tests Performance Tests MaintenanceError Table 6-1. Power-Up Error Codes DescriptionRecommended Model Table 6-2. Recommended Test Equipment Minimum Specification2620A, 2625A Instrument TypeChannel Integrity Test Accuracy Verification Test20 mV 2620A, 2625ATable 6-3. Performance Tests Voltage, Resistance, and Frequency cont Thermocouple Measurement Range Accuracy Test4-Terminal Resistance Test Thermocouple Temperature Accuracy Test OUTPUT 2620A, 2625AEX SNS EX GRDJ K N E T Open Thermocouple Response TestDECADE RESISTANCE BOX HYDRA INPUT MODULERTD Temperature Accuracy Test Using Decade Resistance Source RTD Temperature Accuracy TestDigital Input/Output Verification Tests RTD Temperature Accuracy Test Using DIN/IECDOLEVEL 0,0 CR Assure output 0 measures a LOW state. DOLEVEL 1,0 CR Digital Output TestDigital Input Test DECIMAL VALUE Totalizer TestTERMINAL GROUNDED Table 6-7. Digital Input Values STATE OF DIGITAL INPUTSTotalizer Sensitivity Test Dedicated Alarm Output Test V ΩA 2620A, 2625AExternal Trigger Input Test CalibrationCalibration Variations in the Display ServiceAppendix AppendicesTitle Page Introduction SpecificationsAppendix A Accuracies at Ambient Temperatures Other Than Specified2620A/2625A DC Voltage InputsNormal Mode Rejection Common Mode RejectionAppendices Thermocouple Inputs2620A/2625A Input Impedance RTD InputsCommon Mode and Normal Mode Rejection Appendices2620A/2625A AC Voltage Inputs2-Wire Accuracy Maximum Sensor TemperatureAppendices 2620A/2625A Crest Factor ErrorCommon Mode Rejection DC Component ErrorInput Protection Ohms Inputs2-Wire Accuracy AppendicesSensitivity Frequency Inputs2620A/2625A Frequency RangeAppendices Typical Scanning RateA-11 2620A/2625A Maximum Autoranging TimeTotalizing Input Digital InputsThreshold Trigger InputAppendices IsolationBattery Life Digital and Alarm OutputsReal-Time Clock and Calendar EnvironmentalAppendices GeneralCommon Mode Voltage Weight2620A/2625A 2625A Data Storage2620A Options PowerAppendix B ASCII & IEEE-488 Bus CodesASCII & BUS CODES The initial power-up device setting is Channels 0 - 20OFF IEEE-488.2 Devise Documentation RequirementsAppendix C Implementation of IEEE StandardOpen Thermocouple Detection OTC enabled Alarm parameters Limit-1 and Limit-2 OFF. All limit valuesAlarm assignments Channels 0-3 assigned to outputs 0-3,respectively Digital I/O lines high non-alarm Totalizer 0, with debounce disabledPROGRAM MESSAGE UNIT PROGRAM MESSAGE UNIT SEPARATOR COMMAND MESSAGE UNIT QUERY MESSAGE UNIT COMMAND PROGRAM HEADERThe following queries return data in two formats ALARMLIMIT? AppendicesThere are no device-to-device messages The *CAL? command not implemented an optional commandThe *RDT and *RDT? commands are not implemented 2620A/2625AAppendices Operation complete is generated when the command is parsed2620A/2625A Introduction Signal Cross Talk in a DC Voltage ChannelMaking Mixed Measurements Appendix DRatio worst case AC Signal Cross Talk Into an AC Voltage ChannelAC Signal Cross Talk Into an Ohms Channel AC Signal Cross Talk Into a Frequency Channel2.0 × AC Signal Crosstalk Into a Temperature ChannelTEMPERATURE Error Ratio = ⎢ 5.0 ×2620A/2625A Introduction Binary Upload of Logged Data LOGBIN? 2625A onlyAppendix E Decoding the ASCII StringFigure E-1. ASCII String Decoding 2620A/2625AAppendices Floating Point Conversion2620A/2625A ExampleFigure E-2. Floating Point Conversion AppendicesFigure E-3. Example 2620A/2625ACables RS-232 CablingAppendix F ConnectionsPRINTER 2620A/2625ARS43 PRINTERDCD Rx Tx DTR GND DSR RTS CTS RI RTS - REQUEST TO SEND CTS - CLEAR TO SEND RI - RING INDICATORAppendices RS43 CABLE NULL MODEMTx Rx RTS CTS DSR GND DCD 2620A/2625ARx Tx DTR GND DSR RTS CTS RS40 CABLE OR EQUALFigure F-4. Hydra DB-9 to Modem DB-25 RS-232 Connection AppendicesTx Rx RTS CTS DSR GND DCD 2620A/2625ARx Tx DTR GND DSR RTS CTS RS42 CABLE OR EQUALAppendices Figure F-6. RS-232 DB9 and DB-25 Connectors2620A/2625A Hydra Configuration Record Index