Agilent Technologies E3634A manual Constant Current CC Verifications, Constant Current Test Setup

Chapter 3 Calibration Procedures

Constant Current (CC) Verifications

Constant Current (CC) Verifications

Constant Current Test Setup

Follow the general setup instructions in the ‘‘Measurement Techniques’’ section, starting on page 50 and the specific instructions will be given in the following paragraphs.

Current Programming and Readback Accuracy

This test verifies that the current programming and GPIB or RS-232 readback functions are within specifications. Note that the readback values over the remote interface should be identical to those displayed on the front panel. The accuracy of the current monitoring resistor must be 0.01% or better.

You should program the power supply over the remote interface for this test to avoid round off errors.

1Turn off the power supply and connect a 0.01 W current monitoring resistor

(RM) across the output to be tested and a digital voltmeter across the current monitoring resistor (RM).

2Turn on the power supply. Select the 8V/20A* or 25V/7A** range and enable the output by sending the commands:

VOLT:RANG P8V (E3633A)

VOLT:RANG P25V (E3634A)

OUTP ON

3Program the output voltage to full rated voltage (8.0 V)* or (25.0 V)** and output current to zero amps by sending the commands:

VOLT 8 (E3633A)

VOLT 25 (E3634A)

CURR 0

4Divide the voltage drop (DVM reading) across the current monitoring resistor

(RM) by its resistance to convert to amps and record this value (IO). This value should be within the limit of (0 A ± 10 mA). Also, note that the CC, Adrs, Limit, and Rmt annunciators are on.

5Readback the output current over the remote interface by sending the command:

MEAS:CURR?

*For Agilent E3633A Model **For Agilent E3634A Model

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