Dc Voltage Programming And Measurement Accuracy; Rms Current Accuracy Test - Agilent Technologies 6811B User Manual

B - Verification and Calibration

DC Voltage Programming and Measurement Accuracy

CAUTION:
Disconnect the ratio transformer for this test.
This test verifies the dc voltage programming, GPIB readback, and front panel meter functions. Values
read back over the GPIB should be the same as those displayed on the front panel. Connect the negative
terminal of the DVM to the COM output terminal to determine the ± dc offset voltages.
Action
1. Make sure the ac source is turned off. Connect the DVM directly
to the sense terminals.
2. Turn on the ac source with no load. In the Output menu, execute
the *RST command to reset the unit. Enable the output by
pressing Output On/Off. Program the output voltage as follows:
VOLT 0, OUTP:COUP DC, OFFSET 425
3. Record DC voltage readings at the DVM and on the front panel
display.
Program OFFSET −425
4.
5. Record DC voltage readings at the DVM and on the front panel
display.

RMS Current Accuracy Test

This test verifies the accuracy of the current measurement in rms detection mode.
Action
1. Turn off the ac source and connect the DVM, the 20 ohm load
resistor and current shunt as shown in Figure B-1 with S1 closed.
Connect the DVM across the current shunt.
2. Turn on the ac source. In the Output menu, execute the *RST
command to reset the unit. Enable the output by pressing Output
On/Off. Program the output as follows:
For Agilent 6811B:
VOLT 50, CURR:RANGE LOW, CURR:LEV 3.00
For all other models:
VOLT 50, CURR:RANGE LOW, CURR:LEV 5.00
3. Record the DVM voltage reading and calculate the rms current.
4. Program CURR:RANGE HIGH
5. Record the DVM voltage reading and calculate the rms current.
68
Normal Result
Output voltage at +425 Vdc
Output current near 0.
Readings within specified dc voltage
programming and readback limits.
Output voltage at −425 Vdc
Readings within specified dc voltage
programming and readback limits.
Normal Result
CC annunciator on
Output current at 3.0 (Agilent
6811B)
or 5.0 A (all other models).
Readings within specified limits.
CC annunciator on
Output current at 3.0 (Agilent
6811B)
or 5.0 A (all other models).
Readings within specified limits.