Agilent Technologies 66001A manual Recovering The Factory Calibration Constants

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Using The CAL:AUTO Command

Normal calibration procedures also calibrate the readback circuits that respond to the MEAS: CURR? and MEAS: VOLT? commands. During normal operation, the readback accuracy is affected by temperature changes within the power module. Use of the CAL:AUTO command reduces the temperature error component of the readback accuracy specification. See "Chapter 3 - Language Dictionary" of the Programming Guide for information about this command.

Recovering The Factory Calibration Constants

The original factory calibration constants are stored in EPROM and can be recovered. This may prove helpful in situations where miscalibration is suspected and it is not possible to recalibrate. To restore factory calibration, proceed as follows:

1.Remove the power module from the mainframe and set the calibration switches to the factory position (see Table 2-

1in "Chapter 2 - Installation").

2.Replace the power module and cycle the power (on and then off).

3.Remove the power module from the mainframe and restore the calibration switches to the normal position.

4.Replace the module in the mainframe.

The module now has its original factory calibration constants. However, password protection has been removed from the CAL:STAT ON command.

Recovering From A Lost Calibration Password

The standard factory password is the module model number (for example, 66102). If no one has changed the password, entering the model number will enable the calibration mode (for example, CAL:STAT ON,66102).

If the password is unknown, then the only alternative is to perform the procedure given under "Recovering the Factory Calibration Constants". This removes the password protection from the CAL: STAT ON command. However, it also changes the calibration constants to their original factory values.

Calibration Error Messages

If you enter calibration commands from the keyboard, it will display the error messages listed in Table A-4.

 

Table A-4. Keyboard Calibration Error Messages

CAL ERROR

 

An entered value is not within acceptable range

DOES NOT CAL

 

Computed calibration constant is out of range

PASSWD ERROR

 

You entered an incorrect password

WRONG MODE

 

The power module is not in CV or CC mode, as required

Agilent Basic Calibration Program

The following program can be run on any controller operating under Agilent BASIC. The assumed slot address is 0 and calibration password is 66101. If required, change these parameters in the appropriate statements.

38 Calibration

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Contents USER’S Guide Agilent Part No Microfiche Part No SeptemberCertification Safety Summary Herstellerbescheinigung Symbol DescriptionPrinting History Manufacturers DeclarationModel Numbers a 66000A Manufacturer’s Name and AddressUSA Page Table of Contents Basic Power Module Commands Using the Agilent 66001A MPS KeyboardGeneral Information Item DescriptionOption Description Accessories Output Ratings Specifications and Supplemental CharacteristicsProgramming Accuracy @ calibration temperature ± 5 C Readback AccuracyAgilent Model 66101A 66102A 66103A 66104A 66105A 66106A Performance Specifications ParameterSupplemental Characteristics Parameter 66101A 66102A Agilent Model 66103A 66104A 66105A 66106A Remote Sensing CapabilityWeight Recommended Calibration Interval Safety ComplianceDimensions Downprogramming Monotonicity Gpib Interface CapabilitiesReplaceable Parts List Description Agilent Part No Supplemental CharacteristicsOutput Characteristic Curve Parameter Agilent Model Number and Parameter ValuePage Inspection InstallationSwitches Power Module Line Fuse and Switches Display Function Switch Remote Inhibit RI Function SwitchesSwitch Setting RI Action Calibration Function SwitchesOutput Connector Installing The Module In The MainframeConnecting The Load Resistance Ω/ft Selecting the Proper Wire SizeOutput Connections AWG No. *AmpacityRemote Voltage Sensing Voltage ReadbackParallel Operation Output RatingOutput Noise Voltprot Currlev Voltlev Outp OFFVoltlev Voltprot Currlev MAX Outp onMultiple Loads Capacitive LoadsInductive Loads Connecting The ControllerBattery Charging OVP ConsiderationsIntroduction Power Module Front Panel DisplayTurn-On Checkout Module Panel DisplayAddr Dis Prot Power Module Turn-On StateChecking Basic Module Functions Case Of Trouble Module Output ConnectorError Messages Mainframe FailureMessages Selftest Error MessagesRuntime Error Messages DisplayGpib Controller Basic Power Module CommandsSynopsis Of Commands MPS KeyboardPower Module Protection Commands Function CommandPower Module Output Commands Function Power Module Fixed-Mode Output CommandsControlling List-Mode Output Power Module List-Mode Output CommandsPower Module Trigger Commands Function Controlling TriggersDFI Discrete Fault Indicator Output Command Changing The Power On StateUsing the RI/DFI Functions RI Remote Inhibit Input DFI Output Commands FunctionEnabling Or Disabling The Calibration Function Changing The Calibration PasswordCalibration Performing a CalibrationCalibrating Voltage Table A-2. Voltage Calibration ProcedureEquipment Required Keyboard Entry Controller Entry † FunctionCalcurrlev MIN Table A-3. Current Calibration ProcedureDisable the output Calcurrlev MAXCalibration Error Messages Recovering The Factory Calibration ConstantsRecovering From a Lost Calibration Password Agilent Basic Calibration ProgramPassword is Optional only Assign Power Supply Gpib AddressInitialize Power Supply 10 ! Voltage Calibration ProgramElse END ifPrint Current Calibration not Saved Print Current Calibration CompleteAgilent 66001A MPS Keyboard Using The Agilent 66001A MPS KeyboardConnecting The Keyboard Annunciators Keyboard DescriptionMeter Area Agilent 60001A MPS Keyboard System Keys  Letter Keys Displaying Status Using The DisplayChanging or Entering Values Sending Scpi Commands Command ExampleQuery Example Error Example Scpi Command Tree Agilent 60001A MPS Keyboard Prot Unr IndexAddr AmpsLsn Prot Shift SRQ TlkMeas VOLT?, 32 Outp ScpiInit Agilent Sales and Support Offices Agilent Sales and Support OfficeManual Updates
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