Calibration
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A
Calibration
Introduction
The power supply may be calibrated from the front panel. The procedures given here apply to all models.
Important These instructions do not include verification procedures. If you require verification as part of your
calibration procedure, refer to the appropriate service manual (see Table 1-3 in Chapter 1).
Equipment
The equipment listed in Table A-1, or equivalent, is required for calibration.
Table A-1. Equipment Required for Calibration
Equipment Characteristics Recommended Model
Voltmeter D-c accuracy 0.005%, 6 digits Agilent 3456A or 3458A
Shunt Resistor
Agilent 6541A
0.01 Ω, 0.04%, 100 A, 100 W
Guildline 9230/100
Agilent 6542A, 43A, 44A ,45A
0.1 Ω, 0.04%, 15 A, 100 W
Guildline 9230/15
Agilent 6551A, 52A
0.01 Ω, 0.04%, 100 A, 100 W
Guildline 9230/100
Agilent 6553A, 54A, 55A
0.1 Ω, 0.04%, 15 A, 100 W
Guildline 9230/15
Agilent 6571A
0.001 Ω, 0.04%, 300 A, 100 W
Guildline 9230/300
Agilent 6572A,73A,74A,75A
0.01 Ω, 0.04%, 100 A, 100 W
Guildline 9230/100
General Procedure
Because the power supply output must be enabled during calibration, voltages or currents hazardous to
personnel and/or dangerous to equipment can appear at the output terminals.
Parameters Calibrated
You can calibrate the voltage output and readback, the current output, and the OVP trip function. The normal procedure is
to calibrate voltage first, then current. However, you do not have to do a complete calibration each time. If required, you
may calibrate only the voltage or the current and then proceed to “Saving the Calibration Constants”.
If you want to calibrate the OVP trip function, the power supply will do it automatically via firmware and store the OV
calibration constant. The voltage output must be in calibration before the OV trip voltage is calibrated.
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