Agilent Technologies 6814B, 6834B, 6843A manual Voltage Programming and Measurement Accuracy

Verification and Calibration - B

Voltage Programming and Measurement Accuracy

This test verifies the voltage programming, GPIB measurement, and front panel meter functions. Values read back over the GPIB should be the same as those displayed on the front panel.

Figure B-1 shows the setup. Measure the ac output voltage directly at the output terminals. If you are verifying a three-phase source, sart by verifying output phase 1.

Action Normal Result

1.Make sure the ac source is turned off. Connect the DVM and ratio transformer as shown in the test setup in Figure B-1.

2.	Turn on the ac source with no load. In the Output menu, execute the	*RST
	*RST command to reset the unit to its factory default state.
3.	Program the output voltage to 150 volts and set the output current	CV annunciator on.
	limit to its maximum value.	Output voltage near 0.
		Output current near 0.
4.	Enable the output by pressing Output On/Off.	Output voltage near 150 V.
5.	Record voltage readings at the DVM1 and on the front panel display.	Readings within low voltage
		limits specified in table B-2.
6.	Program the output voltage to 300 volts.	Output voltage near 300 V.
7.	Record voltage readings at the DVM1 and on the front panel display.	Readings within high voltage
		limits specified in table B-2.
8.	If you are verifying a 3-phase source , repeat steps 1 through 7 for	Readings within specified High
	phases 2 and 3. Press Phase Select to select the next phase.	range limits (300 V/1 kHz).

1Multiply the DVM reading by the transformer ratio if a ratio transformer is used.

RMS Current Readback Accuracy

This test verifies the current readback. Use the appropriate current shunt with the accuracy specified in table B-1. Use wire of sufficient size to carry the maximum rated current of the ac source (see table 2-1). If you are verifying a 3-phase source, start by verifying phase 1.

Action

1.Turn off the ac source. Connect the load resistor, current shunt, and the DVM across the current shunt as shown in Figure B-1. Use the

following load resistor values:

Agilent 6814B = 7.5Ω; Agilent 6834B = 15Ω; Agilent 6843A = 5Ω

2.Turn on the ac source. In the Output menu, execute the *RST command to reset the unit to its factory default state.

3.Program the output voltage to 100 volts and set the current limit as follows:

Agilent 6814B = 10 A; Agilent 6834B = 5A; Agilent 6843A = 15A Then enable the output by pressing Output On/Off.

4.Record the DVM voltage reading and calculate the rms current. Divide the DVM reading by the current monitor resistor value. Record the front panel reading.

5.If you are verifying a 3-phase source , repeat steps 1 through 4 for phases 2 and 3. Press Phase Select to select the next phase.

Normal Result

*RST

CCannunciator on. Output current near 10 A for Agilent 6814B near 5 A for Agilent 6834B near 15A for Agilent 6843A

Difference between the measured output current and front panel readings are within specified limits.

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