Xantrex Technology RS232-XHR manual Current Mode Calibration, Current Calibration Setup

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Calibration

Current Mode Calibration

Current Mode Calibration

Current

Calibration

Setup

1.Disconnect the load from the power supply to be calibrated.

2.Connect a shunt across the supply's output terminals.

3.Connect a voltmeter across the shunt.

Power Supply	Power Supply
Positive Output	Negative Output

Current Sensing

Resistor

Current

Program

Calibration

Procedure

+V -

VOLTMETER

Figure 4.2 Current Calibration Setup

1.Connect the shunt and voltmeter to the power supply as shown in Figure 4.2.

2.Activate calibration mode by sending command CMODE ON or CMODE 1 to the power supply.

3.Send command ILO; VLO to the power supply. Measure and record the output shown on the external voltmeter.

4.Send command IHI; VHI to the supply Measure and record the output voltage shown on the external voltmeter.

5.Calculate ILO and IHI from the voltages read from the external voltmeter and the shunt resistance. I=V/R.

6.Send the command IDATA <ilo>,<ihi> to the power supply. <ilo> and <ihi> are the current values obtained from sending the ILO and IHI commands to the power supply. When the power supply is calibrated, the low to high current program calibration values are stored as constants.

7.Program the supply at various levels using the ISET command to confirm that the calibration was successful and that linearity is observed. Refer to the current program accuracy specification in Section 1.

8.Turn off calibration mode by sending the command CMODE OFF or CMODE 0 to the power supply.

58	Operating Manual for RS-232 for XHR/XFR Series Power Supply

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Contents RS232-XHR RS232-XFR Page Operating Manual for How do you get service? Phone 604 422 Toll Free North America 800 667 Fax 604 421What does this warranty not cover? Disclaimer Product Information About Your Power Supply Model Number Serial Number Purchased From Purchase DateSafety SupplyMain Sections Manual RevisionsAbout This Manual Contents Calibration Features and Specifications DescriptionFeatures and Functions FeaturesFeatures and Specifications Readback FunctionsSpecifications Models 140 12-100 20-60 35-35 40-30Models 60-20 100-12 150-8 300-4 600-2 Models 300 12-220 20-130 33-85 40-70 Models 60-46 100-28 150-18 300-9 600-4 Models 130 20-50 33-33 40-25 60-18 Models 100-10 150-7 300-3.5 600-1.7 Introduction Initial InspectionInstallation and Configuration Initial InspectionRS-232 Interface Subplate Located on Power Supply Rear Panel RS-232 Interface PCB Basic Setup Procedure Step # Description Action ReferenceFlow Switch Setting Condition CommunicationsBaud Rate XON Switch Setting Condition Jumper Connections RS-232 Connector PinPower Supply DCE Host Computer DTE Pin connector Jumper J216 Connections RS-232 Connector PinSwitch Position Power on results RemoteStartup Condition Default Settings Model Example IsetExample Command RS-232 ConnectionLocal Lockout Power Supply Settings Parameter SettingUser Options and Settings 12 OVP Control Mode SelectionHigh OFF LOW User Signals User Signals J7 ConnectorJ7 User Signal Connector Circuit Block Diagram J7 User Cable with Ferrite Block Command Syntax RS-232 OperationOperation FormatParameter Description Form Floating Number Definition ExampleOperation Command Summary Command DescriptionAUXA? Cmode Command Reference Auxa 1 onResponse DLY seconds Lockout. See also Remote/Local Operation on Snsp Remote/Local Operation on Status, and Fault Registers on Section Accumulated Status, Status, and Fault Registers Condition Mnemonic Bit Position Bit Weight 4096Error Codes Error # Error Identification ExplanationTroubleshooting LEDsCalibration Voltage Mode Calibration SetupVoltage Program Calibration Procedure VoltageVoltage Readback Calibration Procedure Current Mode Calibration Current Calibration SetupCurrent Program Calibration Procedure Current Readback Calibration Procedure Over Voltage Protection OVP Calibration Page Xantrex Technology Inc