Xantrex Technology GPIB-XPD manual Calibration

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Section 4. Calibration

Introduction

WARNING

Exercise caution when using and servicing power supplies. High energy levels can be stored at the output voltage terminals on all power supplies in normal operation. In addition, potentially lethal voltages exist in the power circuit and the output connector of power supplies which are rated at 40V and over. Filter capacitors store potentially dangerous energy for some time after power is removed.

You can calibrate the GPIB interface by adjusting the signal levels on the interface card so that they correspond to the expected signal levels on the power supply's main assembly. You may need to recalibrate the interface if you replace parts either on the interface board or on the main power supply board, or if the unit falls out of specification due to component aging drifts.

You can calibrate the GPIB Interface for:

•Voltage program

•Voltage readback

•Current program

•Current readback

•Overvoltage protection

The following equipment will be required to accurately calibrate your unit:

•Digital Voltmeter, 5 1/2 digit, 0.1% accuracy or better, with test leads

•Current sensing shunt resistor, rated for 150% of maximum output current, 0.25% accuracy or better

•Connection wires rated for the unit's maximum output current and voltage

•A GPIB equipped computer to send the calibration commands to the unit

Calibrate the unit according to the following procedures, referring to “Command Reference” for more information about the calibration commands used.

The calibration procedures in this section are designed to be performed at an ambient temperature of 25°C ± 5°C.

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Contents GPIB-XPD Page Internal Gpib Interface for XPD 500 Watt Series Phone 604 422 Toll Free North America 800 667 Fax 604 421 How do you get service?What does this warranty not cover? Disclaimer Product Model Number Serial Number Purchased From Purchase Date Information About Your Power SupplySupply SafetyInstallation and Configuration Main SectionsManual Revisions About This Manual Contents Contents Description Features and SpecificationsReadback Features and FunctionsFeatures and Specifications FunctionsSpecifications Models 18-30 33-16 60-9 120-4.5OVP Features and Specifications Initial Inspection IntroductionPower Supply Front Panel with Gpib Interface Installed Gpib Interface Subplate Located on Power Supply Rear Panel Gpib Interface PCB Basic Setup Procedure Step # Description Action ReferencePON SRQ Address IEEE-488 Primary Address SelectionPower On Service Request PON SRQ Rear Panel SRQ Switch Position PON SRQ StateSwitch Position Power on results Iset Condition Default Settings Model ExampleInternal PCB Jumper Selections IEEE-488 Controller ConnectionOVP Control Mode Selection User Signals High OFF LOWHigh LOW OFF User Signals J21 Connector J21 User Signal Connector Circuit Block Diagram J21 User Cable with Ferrite Block Gpib Operation OperationExample Command directed to entire bus, or LSB Bit Decimal Description Reset By Position WeightRequest Service SRQ Set when Power On PON Set when unitCommand Syntax Computer EntryFormat Floating Number Definition Example Description FormIset 2.0A Vset Command Summary DLY? AUXA?AUXB? CMODE?IHI FAULT?Cmode IdataAuxb 1 on Command ReferenceCommand Description Auxa 1 onChanging an output setting Response Fold mode where mode is Mask None = Unmask ALL SnspStatus, and Fault Registers on SNSP, ALL, None Accumulated Status, Status, and Fault Registers onResponse Vmax voltage Condition Mnemonic Bit Position Bit Weight Accumulated Status, Status, and Fault Registers11 Error Codes Error CodesLEDs TroubleshootingCalibration Voltage Voltage Mode CalibrationSetup Voltage Program Calibration Procedure ReadbackCalibration Current Mode Calibration Current Calibration SetupCurrent Program Calibration Procedure Current Readback Calibration Procedure Over Voltage Protection OVP Calibration Page Xantrex Technology Inc