Agilent Technologies E3633A, E3634A manual CV Source effect Line Regulation

Chapter 3 Calibration Procedures

Constant Voltage (CV) Verifications

CV Source effect (Line Regulation)

This test measures the change in output voltage that results from a change in ac line voltage from the minimum value (10% below the nominal input voltage) to maximum value (10% above the nominal input voltage).

1Turn off the power supply and connect a digital voltmeter between the (+) and (-) terminals of the output to be tested as shown in Figure 3-1.

2Connect the ac power line through a variable voltage transformer.

3Turn 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 current to the full rated value (10.0 A)* or (4.0 A)** and the voltage to full rated value (20.0 V)* or (50.0 V)**.

4Operate the electronic load in constant current mode and set its current to (10.0 A)* or (4.0 A)**. Check that the CV annunciator remains lit. If not lit, adjust the load so that the output current drops slightly until the CV annunciator lights.

5Adjust the transformer to low line voltage limit (104 Vac for nominal 115 Vac, 90 Vac for nominal 100 Vac, or 207 Vac for nominal 230 Vac). Record the output reading on the digital voltmeter.

6Adjust the transformer to high line voltage (127 Vac for nominal 115 Vac, 110 Vac for nominal 100 Vac, or 253 Vac for nominal 230 Vac). Record the voltage reading on the digital voltmeter. The difference between the digital voltmeter readings in steps (5) and (6) is the CV line regulation. The difference of the readings should be within the limit of (4 mV)* or (7 mV)**.

3

*For Agilent E3633A Model **For Agilent E3634A Model

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