B - Verification and Calibration
64
Calibrating and Entering Voltage Calibration Values
Action
Display
4.
Connect the DVM (ac volts mode) directly to the ac source via the ratio
transformer shown in Figure B-1. Do not connect the load resistor or
current shunt.
5.
Press
Shift Calibration
, scroll to CAL VOLT AC, and press
Enter
.
CAL:VOLT:AC
6.
Press
Shift Calibration
, scroll to CAL LEV P1, and press
Enter
to select
the first calibration point.
CAL:LEV P1
7.
Press
Shift Calibration,
scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
8.
Press
Shift Calibration,
scroll to CAL LEV P1, use
°
to scroll to the P2
parameter, and press
Enter
. This selects the second calibration point.
CAL:LEV P2
9.
Press
Shift Calibration,
scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
10.
Press
Shift Calibration
, scroll to CAL LEV P1, use
°
to scroll to the P3
parameter, and press
Enter
.
CAL:LEV P3
11.
Press
Shift Calibration,
scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
12.
Press
Shift Calibration
, scroll to CAL LEV P1, use
°
to scroll to the P4
parameter, and press
Enter
.
CAL:LEV P4
13.
Press
Shift Calibration,
scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
The ac source is now holding the new voltage calibration constants in RAM
CAL:DATA 0.00
Calibrating and entering realtime voltage calibration values (Agilent 6843A
only)
14.
Press
Shift Calibration,
scroll to CAL VOLT RTIM, and press
Enter
.
CAL:VOLT:RTIM
15.
Press
Shift Calibration
, scroll to CAL LEV P1, and press
Enter
.
CAL:LEV P1
16.
Press
Shift Calibration,
scroll to CAL DATA, and use the Entry keypad
to enter the voltage value displayed on the DVM. (Multiply the DVM
readings by the transformer ratio if a ratio transformer is used.)
CAL:DATA 0.00
Calibrating the OVP trip point
17.
Press
Shift Calibration,
scroll to CAL VOLT PROT, and press
Enter
.
CAL:VOLT:PROT
18.
Wait for the ac source to compute the OVP calibration constant. The
display returns to Meter mode when the OVP calculation is complete.
The ac source is now holding the new OVP calibration constants in RAM
19.
If you are calibrating a 3-phase source, press
Phase Select
to select the
next phase and repeat steps 4 through 13 and 17 and 18 for phases 2 and 3.
The phase annunciators on the front panel indicate which phase is active.