Chapter 3 Calibration Procedures
Constant Voltage (CV) Verifications
7Program the output voltage to full rated value (20.0 V)* or (50.0 V)** by sending the command:
VOLT 20.0 (E3633A)
VOLT 50.0 (E3634A)
8Record the output voltage reading on the digital voltmeter (DVM). The reading should be within the limit of (20 V ± 20 mV)* or (50 V ± 35mV)**.
9Readback the output voltage over the remote interface by sending the command:
MEAS:VOLT?
10Record the value displayed on the controller. This value should be within the limit of (DVM ± 15 mV)* or (DVM ± 30 mV)**.
CV Load Effect (Load Regulation)
This test measures the change in the output voltage resulting from a change in the output current from full to no load.
1Turn off the power supply and connect a digital voltmeter between the (+) and
2Turn on the power supply. Select the 20V/10A* or 50V/4A** range, enable the output, and set the display to the limit mode. When the display is in the limit mode, program the output current to the full rated value (10.0 A)* or (4.0 A)** and the voltage to the full rated value (20.0 V)* or (50.0 V)**.
3Operate the electronic load in constant current mode and set its current to (10.0 A)* or (4.0 A)**. Check that the front panel CV annunciator remains lit. If not lit, adjust the load so that the output current drops slightly until the CV annunciator lights. Record the output voltage reading on the digital voltmeter.
4Operate the electronic load in open mode (input off). Record the output voltage reading on the digital voltmeter again. The difference between the digital voltmeter readings in steps (3) and (4) is the CV load regulation. The difference of the readings should be within the limit of (4 mV)* or (7 mV)**.
*For Agilent E3633A Model **For Agilent E3634A Model
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