Agilent Technologies 66001A manual Connecting The Controller, Inductive Loads, OVP Considerations

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The power module is designed to be stable for load capacitances up to the following values:

Agilent 66101A

50,000 μF

Agilent 66104A

4,500 μF

Agilent 66102A

20,000 μF

Agilent 66105A

2,750 μF

Agilent 66103A

10,000 μF

Agilent 66106A

1,650 μF

Inductive Loads

You may safely connect the power module output to inductive loads up to 100 mH. (Higher inductances are possible with a modified module. Consult the factory for details.)

OVP Considerations

The OVP circuit senses the voltage at the output terminals, not at the sense terminals. Therefore the voltage sensed by the OVP circuit can be significantly higher than the voltage being regulated at the load. You must program the OVP trip voltage high enough to compensate for the expected drop from the power module output to the load.

Battery Charging

The power module OVP trip circuit has a downprogrammer that discharges the output whenever OVP trips. If the output is connected to a battery and the OVP is tripped (or the power module voltage is programmed below the battery voltage), the power module will sink current from the battery. The down programmer limits the value of this current to no more than 10% of the power module’s maximum rated output current.

Connecting The Controller

The Agilent 66000A Mainframe has a GPIB port for connection to the controller. Each power module has a GPIB primary address determined by a switch on the mainframe, and a GPIB subaddress determined by the mainframe slot in which the module is installed. If the mainframe GPIB address is set to 705, this becomes the power module’s primary address.

The Agilent 66000A Mainframe mode switch determines the IEEE 488 secondary addresses (also referred to as subaddresses) of the modules that are installed in the mainframe. With the mainframe mode switch set to MAIN, modules are assigned secondary addresses of 00 to 07, which correspond to the slot locations indicated on the mainframe. The mainframe mode switch must be set to MAIN when the mainframe is connected directly to the GPIB. For example, if a module is installed in slot 3 of a mainframe that is set to GPIB address 705, the complete address of the module is 70503.

The mainframe mode switch must be set to AUX (auxiliary) when the mainframe is serially-linked to another mainframe that is directly connected to the GPIB. In mainframes that have the mode switch set to AUX, modules are assigned secondary addresses of 08 to 15. Secondary address 08 corresponds to slot location 0 on the mainframe and secondary address 15 corresponds to slot location 7 on the mainframe. For example, if a module is installed in slot 3 of a mainframe that is serially linked to another mainframe at GPIB address 705, the complete address of the module is 70511.

Slot Location

Secondary Address

Module Slot Locations/Addresses

Mainframe Mode Switch = MAIN

0

1

2

3

4

5

6

7

00

01

02

03

04

05

06

07

Mainframe Mode Switch = AUX

0

1

2

3

4

5

6

7

08

09

10

11

12

13

14

15

For details concerning GPIB cabling and addressing, see "Chapter 2 - Installation" in the Agilent 66000A Mainframe Users Guide.

26 Installation

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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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