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Fluke Maximum Autoranging Time, Totalizing Input, Digital Inputs, 2620A/2625A, Input Voltage

Models: 2625A 2620A

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2620A/2625A

Users Manual

Maximum Autoranging Time

(Seconds per Channel)

Function			Range Change

VDC	300 mV	---------------------------->			150 V
150 V	300 mV	>		0.26
150 V	300 mV	>		0.26

VAC	300 mV	---------------------------->			150V
150 V	300 mV	>		1.38
150 V	300 mV	>		1.38

Ohms	300 Ω	---------------------------->			10.0 MΩ
10.0 MΩ	300 Ω	>		1.81
10.0 MΩ	300 Ω	>		1.81

Slow

0.25

0.19

4.50

1.08

1.30

0.75

Fast

0.19

4.12

0.59

Totalizing Input

Input Voltage

30V maximum

4V minimum

2V peak minimum signal

Isolation

None dc-coupled

Threshold

1.4V

Hysteresis

500 mV

Input Debouncing

None or 1.66 ms

Rate

0 to 5 kHz with debouncing off

Maximum Count

65,535

Digital Inputs

Input Voltage

30V maximum -4V minimum

A-12

Page 164

Image 164

Fluke Maximum Autoranging Time, Totalizing Input, Digital Inputs, 2620A/2625A, Input Voltage, Isolation, Threshold

Contents

Hydra Series II Data Acquisition Unit Hydra Series II Data Logger 2620A/2625AUsers Manual LIMITED WARRANTY & LIMITATION OF LIABILITY 5/94Table of Contents TitleIntroduction OverviewOperating the Instrument from the Front Panel Using the Computer Interface2620A/2625A Using the IEEE-488 Interface Computer Interface Command SetUsing Shielded Wiring Additional ConsiderationsMaintenance 2620A/2625AAppendices IndexList of Tables TitlePerformance Tests for RTD Temperature Function DIN/IEC 751 Amendment 2620A/2625APerformance Tests Voltage, Resistance, and Frequency Amendment 1 IPTS-68List of Figures Title4-Terminal Connections to Decade Resistance Box Hydra DB-9 to PC DB-9 RS-232 Connection GenericInterference Information Declaration of the Manufacturer or ImporterBescheinigung des Herstellers/Importeurs viiiSafety Terms in this Manual Symbols Marked on EquipmentTo avoid electric shock ∙ Remove inputs from live voltages before opening the input moduleAC Power Source DC Power SourceUse the Proper Power Cord 2620A/2625AGetting Started Setting Up a ChannelIntroduction 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 ManualIntroduction ChapterTitle Page2620A, 2625A Users ManualOptions and Accessories The Hydra Series II Data Acquisition UnitThe Hydra Series II Data Logger IEEE-488 Interface AssemblyTable 1-1. Hydra Features 2620A, 2625AWhere to go From Here AccessoriesWhere to go From Here IntroductionChapter 4 Using the Computer Interface Chapter 6 MaintenanceGetting Started Chapter 1 IntroductionTitle OverviewChapter 2620A, 2625A Users ManualSetting Up the Instrument IntroductionAdjusting the Handle 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 Front Panel Display Reading the DisplayLeft 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, 2625AOperating the Instrument from the Front Panel Using the Digital I/O LinesChanging the Temperature Unit Setting Date and Time of Day2620A, 2625A Front Panel Review Only FunctionFront Panel Monitor Only Function Computer Interface-Initiated LockoutsConfiguration Mode Figure 3-1. Configuration ModeIntroduction Operating ModesWhat is the Present Configuration? Channel ConfigurationOther Displayed Data 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 Setting Alarms Alarm LimitsChannel Configuration 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 SelectionMeasurement Connections Setting Date and Time of DayTo avoid electric shock ∙ Remove inputs from live voltages before opening the input moduleDC Volts, AC Volts, Frequency, and Thermocouples Operating the Instrument from the Front Panel Measurement ConnectionsSTRAIN RELIEF 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 Totalizing Review ArrayGeneral 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 ManualUsing the Computer Interface Installing the IEEE-488 InterfaceChapter TitleService Request Enable Register Computer Interface Command SetStatus Byte Register 4-19Using the RS-232 Computer Interface To determine which computer interface is enabled, select COMM KL. If IEEE appears on the display, the IEEE-488 interface is enabled 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 Memory Storage Computer Interface Control Memory Retrieval07420102/09/91 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 Installation Test Device Clear Using Ctrl CRS-232 Information Character EchoingUsing the IEEE-488 Interface Sample Program Using the RS-232 Computer InterfaceInstalling the IEEE-488 Interface RS-232 Prompts2620A, 2625A Figure 4-2. Sample ProgramFigure 4-2. Sample Program cont Using the Computer InterfaceUsing the IEEE-488 Interface Table 4-3. IEEE-488 Setup BaudAddress Enabling the IEEE-488 InterfaceCapability Table 4-2. IEEE-488.1 Capabilities DescriptionHow the Instrument Processes Input General Information RS-232 and IEEE-488Installation Test Input Strings The instrument stores received input in a 350-byte input bufferInput Terminators Typical Input StringsUsing the Computer Interface General Information RS-232 and IEEE-488FUNC 1, OHMS, 3 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 Event Status and Event Status Enable Registers Status Byte RegisterName 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 Using the Computer Interface Computer Interface Command Setlimitnum = 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 alarm 2620A, 2625ATRIGGER? Trigger Type QueryAdditional Considerations External Trigger Enabled TypeMonitor Alarm Enabled Type When Measuring Resistance or Temperature RTD2620A, 2625A Users ManualMeasurement Rate Advanced Trigger MechanismsIntroduction 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 Using Shielded Wiring Non-Isolated Sensor ConfigurationIsolated and Shielded Sensor Configuration WWarningIn More Detail Maintenance Thermocouple Temperature Accuracy TestDedicated Alarm Output Test Chapter2620A, 2625A Users ManualCleaning Self-Test Diagnostics and Error CodesLine Fuse When the instrument is powered up, the entire display lightsPerformance Tests Maintenance ErrorTable 6-1. Power-Up Error Codes Description Performance TestsTable 6-2. Recommended Test Equipment Minimum Specification 2620A, 2625AInstrument Type 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 2620A, 2625A EX SNSEX GRD OUTPUTOpen Thermocouple Response Test DECADE RESISTANCE BOXHYDRA INPUT MODULE J K N E TRTD Temperature Accuracy Test RTD Temperature Accuracy Test Using Decade Resistance SourceRTD 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 Totalizer Test TERMINAL GROUNDEDTable 6-7. Digital Input Values STATE OF DIGITAL INPUTS DECIMAL VALUETotalizer Sensitivity Test Dedicated Alarm Output Test 2620A, 2625A V ΩACalibration CalibrationExternal Trigger Input Test Service Variations in the DisplayTitle AppendicesAppendix Page Specifications Appendix AAccuracies at Ambient Temperatures Other Than Specified IntroductionDC Voltage Inputs Normal Mode RejectionCommon Mode Rejection 2620A/2625AThermocouple Inputs Appendices2620A/2625A RTD Inputs Common Mode and Normal Mode RejectionAppendices Input ImpedanceAC Voltage Inputs 2-Wire AccuracyMaximum Sensor Temperature 2620A/2625AAppendices Crest Factor Error Common Mode RejectionDC Component Error 2620A/2625AOhms Inputs 2-Wire AccuracyAppendices Input ProtectionFrequency Inputs 2620A/2625AFrequency Range SensitivityA-11 Typical Scanning RateAppendices Maximum Autoranging Time Totalizing InputDigital Inputs 2620A/2625ATrigger Input AppendicesIsolation ThresholdDigital and Alarm Outputs Real-Time Clock and CalendarEnvironmental Battery LifeGeneral Common Mode VoltageWeight Appendices2625A Data Storage 2620A OptionsPower 2620A/2625AASCII & IEEE-488 Bus Codes Appendix BASCII & BUS CODES IEEE-488.2 Devise Documentation Requirements Appendix CImplementation of IEEE Standard The initial power-up device setting is Channels 0 - 20OFFAlarm parameters Limit-1 and Limit-2 OFF. All limit values Alarm assignments Channels 0-3 assigned to outputs 0-3,respectivelyDigital I/O lines high non-alarm Totalizer 0, with debounce disabled Open Thermocouple Detection OTC enabledCOMMAND MESSAGE UNIT QUERY MESSAGE UNIT COMMAND PROGRAM HEADER The following queries return data in two formats ALARMLIMIT?Appendices PROGRAM MESSAGE UNIT PROGRAM MESSAGE UNIT SEPARATORThe *CAL? command not implemented an optional command The *RDT and *RDT? commands are not implemented2620A/2625A There are no device-to-device messagesOperation complete is generated when the command is parsed Appendices2620A/2625A Signal Cross Talk in a DC Voltage Channel Making Mixed MeasurementsAppendix D IntroductionAC Signal Cross Talk Into an AC Voltage Channel AC Signal Cross Talk Into an Ohms ChannelAC Signal Cross Talk Into a Frequency Channel Ratio worst caseAC Signal Crosstalk Into a Temperature Channel TEMPERATURE Error Ratio = ⎢5.0 × 2.0 ×2620A/2625A Binary Upload of Logged Data LOGBIN? 2625A only Appendix EDecoding the ASCII String Introduction2620A/2625A Figure E-1. ASCII String DecodingFloating Point Conversion AppendicesExample 2620A/2625AAppendices Figure E-2. Floating Point Conversion2620A/2625A Figure E-3. ExampleRS-232 Cabling Appendix FConnections Cables2620A/2625A RS43PRINTER PRINTERRTS - REQUEST TO SEND CTS - CLEAR TO SEND RI - RING INDICATOR AppendicesRS43 CABLE NULL MODEM DCD Rx Tx DTR GND DSR RTS CTS RI2620A/2625A Rx Tx DTR GND DSR RTS CTSRS40 CABLE OR EQUAL Tx Rx RTS CTS DSR GND DCDAppendices Figure F-4. Hydra DB-9 to Modem DB-25 RS-232 Connection2620A/2625A Rx Tx DTR GND DSR RTS CTSRS42 CABLE OR EQUAL Tx Rx RTS CTS DSR GND DCDFigure F-6. RS-232 DB9 and DB-25 Connectors Appendices2620A/2625A Hydra Configuration Record Index