Agilent Technologies 6050A Front Panel Description, Remote Programming, Local/Remote Control

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Front Panel Description

The front panel includes a 12-character alphanumeric display, 11 status indicators, and four groups of keypads. Ordinarily the alphanumeric display shows the number of the channel presently under front-panel control, and the input voltage and

current of that channel. By using the key you can sequentially display input power, programming error codes, and protection-circuit status. If any protection circuits are active, that status will be displayed first when you use the

key. If you change channels via the front panel, any fault information will be displayed first for the new channel. Then you can key through the display in the normal sequence. The alphanumeric display also shows what function is being performed when you use the keypads.

The display also includes 11 annunciators that point to the 11 status labels printed on the front panel. The Constant Current, Constant Resistance, Constant Voltage, Transient, and Unregulated status annunciators are specific to the channel displayed. The Protection, Error, Shift, Remote, Address, and Service ReQuest status annunciators are channel independent.

Four of the keys perform two functions, with the alternative function labeled in blue above the key. The alternative function is selected by first pressing the blue (shift) key, which turns on the Shift annunciator and enables the alternative function.

Note that the front-panel display operates independently from the GPIB CHANNEL command. In other words, you can select a channel locally (front panel) for which the display will show the input voltage and current, and the controller can subsequently send commands to other channels without changing the channel being displayed.

Remote Programming

Commands sent to the Electronic Load via GPIB are decoded by the mainframe microprocessor, which detects syntax and range errors. The mainframe processor also prescales data sent to the modules, and maintains status registers for each module. Three commands have aliases for compatibility with other HPSL instruments. MODE can also be called FUNCtion, INPut can also be called OUTPut, and CHANnel can also be called INSTrument. OUTPut and INSTrument would typically be used if you want your program to refer to the load modules in terms of the device or instrument under test. Be careful if using INSTrument for CHANnel in systems that have more than one Electronic Load mainframe; someone looking at the listing in the future may be misled.

Local/Remote Control

Local (front panel) control is in effect immediately after power is applied. The front panel keypad and display allow manual control of each individual module when the Electronic Load is used in bench test applications. Remote (computer) control goes into effect (front panel Rmt annunciator is on) as soon as the mainframe receives a command via the GPIB. A built-in GPIB interface and HPSL compatible commands allow control and readback of all functions when the Electronic Load is used in computer controlled applications.

With remote control in effect, only the computer can control the Electronic Load; the front panel keypad has no effect. You can, however, still use the front panel display to view the input voltage and current readings. You can return the Electronic

Load to local control from remote control by pressing . This will return the Electronic Load to local control, unless the local-lockout command has been received from the GPIB computer.

Most of the functions that can be performed remotely over the GPIB can also be performed locally at the front panel. The names on the keys reflect the HPSL commands that are used to program the various functions. Consequently, learning to operate the Electronic Load from the front panel will aid you when you start to write computer programs.

Details of local operation are covered in Chapter 4 - Local Operation and fundamentals of remote programming are given in Chapter 5 - Remote Operation. Complete HPSL programming details are given in the Agilent Electronic Loads Programming Reference Guide. The remaining paragraphs in this chapter describe the operating modes, transient

16 Operation Overview

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Contents Operating Manual Certification Safety Summary Safety Summary Symbol DescriptionHerstellerbescheinigung Manufacturer’s DeclarationPrinting History Page Table of Contents Installation Local OperationRemote Operation Considerations for Operating in Constant Resistance ModeCalibration Page Options What’s In This ManualGeneral Information Safety Requirements SpecificationsDimensions Page Introduction Operation OverviewFront Panel Description Local/Remote ControlRemote Programming Programmable Features Extended Power OperationModes of Operation Immediate Current Level Constant Current CC ModeTriggered Current Level Constant Resistance CR Mode Transient Current LevelSoftware Current Limit Slew RateConstant Voltage CV Mode Immediate Resistance LevelTriggered Resistance Level Transient Resistance LevelTransient Voltage Level Triggered Voltage LevelTransient Operation Continuous Transient Operation Hpsl Command DescriptionPulsed Transient Operation Selects pulsed transient operation Selects the external trigger inputSets pulse width to 1 millisecond Triggering a preset level Selects the external trigger input sourceSelects toggled operation Triggering a transient pulseSlew Rate And Minimum Transition Time Risetime Transition LimitationInput Current, Voltage, and Power Measurement Transition Times and Slew Rates Short On/OffReading Remote Programming Errors Saving and Recalling SettingsInput On/Off Resetting Latched Protection Protection FeaturesStatus Reporting Overvoltage OverpowerOvercurrent Control Connector OvertemperatureReverse Voltage Remote SensingFault External Programming InputPage Installing The Modules InspectionPower Cord Configurations Procedure Installing The Mainframes Channel NumberCooling Turn-On CheckoutRack Mounting Line Voltage Switches Changing Line VoltageGpib Errors Channel Errors DescriptionTurn-On/Selftest Display DescriptionPower Test Controller ConnectionRear Panel Connectors and Switches Wire Size Strip backGpib Address AWGInput Binding Post Control Connector Sense SwitchPins Al and A2 +Sand -SIM and VM Com pin A3Wiring Considerations Trigger ConnectorApplication Connections Stranded Copper Wire Ampere Capacity Wire Size AmpacityLocal Sense Connections Remote Sense ConnectionsMaximum Wire Lengths to Limit Voltage Drops Zero-Volt Loading Connections12. Local Sensing 14. Parallel Operation Page Local Operation Local OperationControls and Indicators Description Chan Keys Function Keys Local Control Overview Using The Chan Keys Using The Function Keys Selecting the ChannelIdentifying the Selected Channel Turning the Input On/OffRecommended Programming Sequence Setting the Mode of Operation Setting CC ValuesProgramming Ranges ExamplesSetting CR Values Examples Setting CV Values Programming RangeTransient Operation Shorting The Input Setting The Gpib Address Using The System KeysDisplaying Error Codes Changing Wake-up Settings Recalling the Factory Default ValuesPage Enter/Output Statements Gpib AddressOutput EnterSending a Remote Command Selecting a ChannelGetting Data Back Output 705 MeascurrRemote Programming Commands CC Mode Example CV Mode ExampleOutput 705INPUT on Output 705MEASCURR? Output 705 Chan 2INPUT OFF Output 705MODEVOLTRemote Programming Flowchart Sheet Remote Programming Flowchart Sheet CR Mode Example Output 705INPUT on Output 705MEASPOW?Continuous Transient Operation Example Output 705CHAN 2INPUT OFF Output 705MODECURRSynchronous Toggled Transient Operation Example Pulsed Transient Operation ExampleOutput 705CHAN 1INPUT OFF Output 705MODEVOLT Output 705 Trigsour TIM Page Equipment Required CalibrationCalibration Commands CharacteristicsEquipment Required for Calibration Recommended ModelCalibration Flowcharts Example ProgramsCalibration Flowchart for a Modules Calibration Flowchart for a Modules Calibration Flowchart for a Modules Pause Program Listing for a ModulesPause Subend Print Voltage Calibration END if ElseLine 610 Set low calibration point Calibration Flowchart for B Modules Calibration Flowchart for B Modules Calibration Flowchart for B Modules Program Listing for B Modules Clear Screen Print TABXY10,10CALIBRATION DoneWait 1260 If Flag then 1270 Output @LdRESReshipt 1280 Considerations For Operating In Constant Resistance Mode Considerations For Operating In Constant Resistance ModeConsiderations For Operating In Constant Resistance Mode Index IndexIndex Index 19, 20, 21 Agilent Sales and Support Offices Agilent Sales and Support OfficesManual Updates

6051A, 6050A specifications

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