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Verification and Calibration - B
65
Calibrating and Entering Current Calibration Values
Action Display
20. Connect the appropriate current shunt and load resistor as shown in figure B-
1. Connect the DVM (ac rms mode) across the current shunt.
If you are calibrating a 3-phase source, make sure that the default phase 1
(
φ
1) annunciator is lit. Press
Phase Select to select a different phase.
21.
Press Shift Calibration, scroll to CAL CURR AC, and press Enter.
CAL:CURR:AC
22.
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.
CAL:LEV P1
23.
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the first current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
CAL:DATA 0.00
24.
Press Shift Calibration, scroll to CAL LEV P1, use ° to scroll to the P2
parameter, and press Enter.
CAL:LEV P2
25.
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the second current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
CAL:DATA 0.00
26.
If you are calibrating a 3-phase source, press
Phase Select to select the
next phase and repeat steps 20 through 25 for phases 2 and 3.
The phase annunciators on the front panel indicate which phase is active.
Calibrating and entering rms current measurement values (Agilent 6843A only)
27.
Press Shift Calibration, scroll to CAL CURR MEAS, and press Enter.
CAL:CURR:MEAS
28.
Press Shift Calibration, scroll to CAL LEV P1, and press Enter.
CAL:LEV P1
29.
Press Shift Calibration and scroll to CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the first current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
CAL:DATA 0.00
30.
Press Shift Calibration, scroll to CAL LEV P1 command, use ° to scroll
to the P2 parameter, and press Enter.
CAL:LEV P2
31.
Press Shift Calibration and scroll to the CAL DATA. Wait for the DVM
reading to stabilize. Read the DVM and calculate the second current value
(DVM ac rms voltage divided by the shunt resistance). Use the Entry keypad
to enter the rms current value.
The ac source is now holding the new current calibration constants in RAM
CAL:DATA 0.00