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Fluke user manual 2620A, 2625A

Models: 2625A 2620A

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THESE

2620A, 2625A

Users Manual

Table 3-5. Thermocouple Temperature

Range

ChannelG

FunctionG

(Note)G

PRESS

BUTTONS:

OFF

SELECT

V DC

(Completes

FROM

V AC

Selection and

THESE

returns to

CHOICES:

Inactive Mode)

°C or °F

Note: The nine thermocouple choices and related temperature measurement ranges are:

"J"	Type J (-210 to 760 °C)
"K"	Type K (-270 to 1372 °C)
"E"	Type E (-270 to 1000 °C)
"T"	Type T (-270 to 400 °C)
"N"	Type N (-270 to 1300 °C)
"R"	Type R (0 to 1767 °C)
"S"	Type S (0 to 1767 °C)
"b"	Type B (0 to 1820 °C)
"C"	Type C (0 to 2316 °C)*
	(Tungsten - 5% Rhenium vs. Tungsten - 26% Rhenium)
	"Pt" selects RTD temperature measurement (DIN/IEC 751). See Table 3-6.
	* Hoskins Engineering Co.

3-8

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Contents

Hydra Series II Data Acquisition Unit Hydra Series II Data Logger 2620A/2625AUsers Manual LIMITED WARRANTY & LIMITATION OF LIABILITY 5/94Introduction Table of ContentsTitle OverviewOperating the Instrument from the Front Panel Using the Computer Interface2620A/2625A Using Shielded Wiring Using the IEEE-488 InterfaceComputer Interface Command Set Additional ConsiderationsAppendices Maintenance2620A/2625A IndexList of Tables TitlePerformance Tests for RTD Temperature Function DIN/IEC 751 Amendment 2620A/2625APerformance Tests Voltage, Resistance, and Frequency Amendment 1 IPTS-684-Terminal Connections to Decade Resistance Box List of FiguresTitle Hydra DB-9 to PC DB-9 RS-232 Connection GenericBescheinigung des Herstellers/Importeurs Interference InformationDeclaration of the Manufacturer or Importer viiiTo avoid electric shock Safety Terms in this ManualSymbols Marked on Equipment ∙ Remove inputs from live voltages before opening the input moduleUse the Proper Power Cord AC Power SourceDC Power Source 2620A/2625AIntroduction Getting StartedSetting Up a Channel The Basics2620A/2625A Selecting the Scan Data DestinationTaking Measurements Getting Started continuedViewing Minimum, Maximum, and Last Data Values 2620A/2625APress Mto activate the Monitor function LAST MIN MAX LAST MIN MAX oo24f.eps2620A/2625A Users ManualTitle IntroductionChapter Page2620A, 2625A Users ManualThe Hydra Series II Data Logger Options and AccessoriesThe Hydra Series II Data Acquisition Unit IEEE-488 Interface AssemblyTable 1-1. Hydra Features 2620A, 2625AWhere to go From Here Where to go From HereAccessories IntroductionGetting Started Chapter 4 Using the Computer InterfaceChapter 6 Maintenance Chapter 1 IntroductionTitle OverviewChapter 2620A, 2625A Users ManualAdjusting the Handle Setting Up the InstrumentIntroduction Unpacking and Inspecting the InstrumentLine Power Front/Rear Panel FeaturesFigure 2-2. Front Panel Setting Up the InstrumentOverview Figure 2-5. Annunciators Figure 2-3. Left DisplayFigure 2-4. Right Display Table 2-1. Display Annunciators Setting Up the InstrumentOverview Figure 2-6. Rear View 2620A, 2625ATable 2-1. Display Annunciators cont Input Channels Operating ModesTurning the Instrument On Left Display Front Panel DisplayReading the Display Right DisplaySelecting a Channel Front Panel ButtonsUsing the Buttons Setting up a Channel N O L KSetting up a Channel Setting Alarm Limits and Mx+B Scaling Values Alarm LimitsSetting the Scan Interval Mx+B ScalingReviewing Channel Data Using the Monitor FunctionUsing the Scan Function Using External DC Power Viewing the Totalizer CountUsing the Rack Mount Kit 2620A, 2625ASetting Date and Time of Day Operating the Instrument from the Front PanelUsing the Digital I/O Lines ChapterFront Panel Monitor Only Function 2620A, 2625AFront Panel Review Only Function Computer Interface-Initiated LockoutsIntroduction Configuration ModeFigure 3-1. Configuration Mode Operating ModesOther Displayed Data What is the Present Configuration?Channel Configuration If Power is Interruptedcleared for all channels Table 3-1. Configuration Reset SettingsChannels 4-20 assigned to digital I/O lines 4-7, as follows Page Channel Configuration Operating the Instrument from the Front Panel2620A, 2625A Channel Configuration Setting AlarmsAlarm Limits Operating the Instrument from the Front PanelAlarm Indications GAGEResetting Alarm Conditions Using the Digital I/O LinesB to define the scaling values Table 3-8. Initial Alarm Assignments, Digital I/O Lines 4 ThroughMx+B Scaling Page Instrument Configuration Entering and Changing Numeric ValuesSelecting Scan Interval Selecting the Measurement RateChanging the Temperature Unit TriggeringExternal Triggering Table 3-11. Measurement Rate SelectionTo avoid electric shock Measurement ConnectionsSetting Date and Time of Day ∙ Remove inputs from live voltages before opening the input moduleDC Volts, AC Volts, Frequency, and Thermocouples STRAIN RELIEF Operating the Instrument from the Front PanelMeasurement Connections Figure 3-2. Input Module ConnectionsResistance and RTD USE H AND L TERMINALS FOR ANY CHANNEL CHANNEL 0 ON FRONT PANEL Operating the Instrument from the Front PanelMeasurement Connections General TotalizingReview Array ConnectionsList Button Functions Table 3-16. List Button Operation Note1Autoprint Memory StorageFront Panel Monitor Only Function Front Panel Lock out ConditionsFront Panel Review Only Function Computer Interface-Initiated Lockouts REM AnnunciatorCalibration 2620A, 2625A Users ManualChapter Using the Computer InterfaceInstalling the IEEE-488 Interface TitleStatus Byte Register Service Request Enable RegisterComputer Interface Command Set 4-19L. If IEEE appears on the display, the IEEE-488 interface is enabled Using the RS-232 Computer InterfaceTo determine which computer interface is enabled, select COMM K Otherwise, if a baud rate appears, the RS-232 interface is enabledSetting Communication Parameters RS-232 Autoprint Output Format Autoprint and Memory Storage RS-232Autoprint Computer Interface Control 07420102/09/91 Memory Storage Computer Interface ControlMemory Retrieval 5 -3.2345 mMX+B H/R12123.87 kOHMS/L1731.268VAC ALM15DIO204TOTAL0Cabling the Instrument to a Host or Printer RS-232 Memory Full OperationClearing Memory RS-232 Information Installation TestDevice Clear Using Ctrl C Character EchoingInstalling the IEEE-488 Interface Using the IEEE-488 InterfaceSample Program Using the RS-232 Computer Interface RS-232 Prompts2620A, 2625A Figure 4-2. Sample ProgramFigure 4-2. Sample Program cont Using the Computer InterfaceUsing the IEEE-488 Interface Capability Table 4-3. IEEE-488 Setup BaudAddressEnabling the IEEE-488 Interface Table 4-2. IEEE-488.1 Capabilities DescriptionHow the Instrument Processes Input General Information RS-232 and IEEE-488Installation Test Input Terminators Input StringsThe instrument stores received input in a 350-byte input buffer Typical Input StringsFUNC 1, OHMS, 3 Using the Computer InterfaceGeneral Information RS-232 and IEEE-488 FUNC 12, TEMP, KHow the Instrument Processes Output Sending Numeric Values to the Instrument RS-232 and IEEE-488Sending Input Strings to the Instrument Service Requests IEEE-488 only and Status Registers 2620A, 2625A 7 6 ESBOutput Queue Name Event Status and Event Status Enable RegistersStatus Byte Register Table 4-4. Status Byte Register DescriptionReading the Status Byte Register Service Request Enable Register Instrument Event RegisterComputer Interface Command Set Table 4-7. Command and Query Summary Using the Computer InterfaceComputer Interface Command Set Table 4-7. Command and Query Summary cont 2620A, 2625ATable 4-7. Command and Query Summary cont Using the Computer InterfaceComputer Interface Command Set Table 4-8. Command and Query Reference 2620A, 2625ATable 4-8. Command and Query Reference cont Using the Computer InterfaceComputer Interface Command Set 2620A, 2625A limitnum = Using the Computer InterfaceComputer Interface Command Set DOstateSet instrument calendar values Return alarm limit data for specified channel and limit2620A, 2625A Using the Computer Interface Computer Interface Command SetTable 4-8. Command and Query Reference cont 2620A, 2625AIf 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 Using the Computer InterfaceComputer Interface Command Set Table 4-8. Command and Query Reference cont 2620A, 2625ALOCK LOCK? LOCS LOG? Using the Computer InterfaceComputer Interface Command Set 2620A, 2625A LOGGED? LOGBIN? LOGCLR LOGCOUNT?Table 4-8. Command and Query Reference cont Using the Computer InterfaceComputer Interface Command Set 2620A, 2625A Table 4-8. Command and Query Reference contEnables monitoring of given channel if monitoring Next Scan’s Values Using the Computer InterfaceComputer Interface Command Set 2620A, 2625A Using the Computer Interface Computer Interface Command SetTable 4-8. Command and Query Reference cont 2620A, 2625AUsing the Computer Interface Computer Interface Command SetTable 4-8. Command and Query Reference cont 2620A, 2625ATOTAL TOTAL? TOTALDBNC TOTALDBNC? TRIGGER Using the Computer InterfaceComputer Interface Command Set TRIGGER? alarm2620A, 2625A Trigger Type QueryMonitor Alarm Enabled Type Additional ConsiderationsExternal Trigger Enabled Type When Measuring Resistance or Temperature RTD2620A, 2625A Users ManualIntroduction Measurement RateAdvanced Trigger Mechanisms These two additional trigger mechanisms are mutually exclusiveREMS, a *TRG can be generated from the front panel by pressing Q Both External and Monitor Alarms Disabled TypeExternal Trigger Enabled Type Additional Considerations Advanced Trigger MechanismsMonitor Alarm Enabled Type When Measuring Resistance or Temperature RTDThermal Voltages oo16f.eps When Measuring Resistance or Temperature RtdAdditional Considerations Waveform Comparison True RMS vs Average Responding True RMS MeasurementsEffects of Internal Noise in AC Measurements Making Mixed Measurements Making Mixed MeasurementsTO DISPLAY RMS FOR SINE WAVES 2620A, 2625AFigure 5-3. Comparison of Common Waveforms Isolated and Shielded Sensor Configuration Using Shielded WiringNon-Isolated Sensor Configuration WWarningIn More Detail Chapter MaintenanceDedicated Alarm Output Test Title2620A, 2625A Users ManualLine Fuse CleaningSelf-Test Diagnostics and Error Codes When the instrument is powered up, the entire display lightsPerformance Tests Table 6-1. Power-Up Error Codes Description MaintenanceError Performance TestsInstrument Type Table 6-2. Recommended Test Equipment Minimum Specification2620A, 2625A Recommended ModelAccuracy Verification Test Channel Integrity Test2620A, 2625A 20 mVThermocouple Measurement Range Accuracy Test Table 6-3. Performance Tests Voltage, Resistance, and Frequency cont4-Terminal Resistance Test Thermocouple Temperature Accuracy Test EX GRD 2620A, 2625AEX SNS OUTPUTHYDRA INPUT MODULE Open Thermocouple Response TestDECADE RESISTANCE BOX J K N E TRTD Temperature Accuracy Test Using Decade Resistance Source RTD Temperature Accuracy TestRTD Temperature Accuracy Test Using DIN/IEC Digital Input/Output Verification TestsDigital Input Test Digital Output TestDOLEVEL 0,0 CR Assure output 0 measures a LOW state. DOLEVEL 1,0 CR Table 6-7. Digital Input Values STATE OF DIGITAL INPUTS Totalizer TestTERMINAL GROUNDED DECIMAL VALUETotalizer Sensitivity Test Dedicated Alarm Output Test 2620A, 2625A V ΩACalibration CalibrationExternal Trigger Input Test Service Variations in the DisplayTitle AppendicesAppendix Page Introduction SpecificationsAppendix A Accuracies at Ambient Temperatures Other Than SpecifiedInput Impedance DC Voltage Inputs2620A/2625A Normal Mode RejectionThermocouple Inputs Appendices2620A/2625A Input Impedance RTD InputsAppendices Common Mode and Normal Mode Rejection2620A/2625A AC Voltage Inputs2-Wire Accuracy Maximum Current Through SensorAppendices 2620A/2625A Crest Factor ErrorDC Component Error Input ImpedanceAppendices Ohms Inputs2-Wire Accuracy Input ProtectionFrequency Range Frequency Inputs2620A/2625A SensitivityA-11 Typical Scanning RateAppendices Digital Inputs Maximum Autoranging TimeTotalizing Input 2620A/2625AIsolation Trigger InputAppendices ThresholdEnvironmental Digital and Alarm OutputsReal-Time Clock and Calendar Battery LifeAppendices GeneralWeight AltitudePower 2625A Data Storage2620A Options 2620A/2625AASCII & IEEE-488 Bus Codes Appendix BASCII & BUS CODES Implementation of IEEE Standard IEEE-488.2 Devise Documentation RequirementsAppendix C The initial power-up device setting is Channels 0 - 20OFFDigital I/O lines high non-alarm Totalizer 0, with debounce disabled Alarm parameters Limit-1 and Limit-2 OFF. All limit valuesAlarm assignments Channels 0-3 assigned to outputs 0-3,respectively Open Thermocouple Detection OTC enabledAppendices COMMAND MESSAGE UNIT QUERY MESSAGE UNIT COMMAND PROGRAM HEADERThe following queries return data in two formats ALARMLIMIT? PROGRAM MESSAGE UNIT PROGRAM MESSAGE UNIT SEPARATOR2620A/2625A The *CAL? command not implemented an optional commandThe *RDT and *RDT? commands are not implemented There are no device-to-device messagesOperation complete is generated when the command is parsed Appendices2620A/2625A Appendix D Signal Cross Talk in a DC Voltage ChannelMaking Mixed Measurements IntroductionAC Signal Cross Talk Into a Frequency Channel AC Signal Cross Talk Into an AC Voltage ChannelAC Signal Cross Talk Into an Ohms Channel Ratio worst case5.0 × AC Signal Crosstalk Into a Temperature ChannelTEMPERATURE Error Ratio = ⎢ 2.0 ×2620A/2625A Decoding the ASCII String Binary Upload of Logged Data LOGBIN? 2625A onlyAppendix E Introduction2620A/2625A Figure E-1. ASCII String DecodingFloating Point Conversion AppendicesExample 2620A/2625AAppendices Figure E-2. Floating Point Conversion2620A/2625A Figure E-3. ExampleConnections RS-232 CablingAppendix F CablesPRINTER 2620A/2625ARS43 PRINTERRS43 CABLE NULL MODEM RTS - REQUEST TO SEND CTS - CLEAR TO SEND RI - RING INDICATORAppendices DCD Rx Tx DTR GND DSR RTS CTS RIRS40 CABLE OR EQUAL 2620A/2625ARx Tx DTR GND DSR RTS CTS Tx Rx RTS CTS DSR GND DCDAppendices Figure F-4. Hydra DB-9 to Modem DB-25 RS-232 ConnectionRS42 CABLE OR EQUAL 2620A/2625ARx Tx DTR GND DSR RTS CTS Tx Rx RTS CTS DSR GND DCDFigure F-6. RS-232 DB9 and DB-25 Connectors Appendices2620A/2625A Hydra Configuration Record Index