AMETEK Ls Series - Manual (Page 102)

User Manual Lx / Ls Series
98
6.5 Phase Offset Calibration
The phase offsets for phase B and C can be calibrated using the OUTPUT CALIBRATION
screen. The same calibration can be done over the RS232 or GPIB bus if needed. Refer to the
Lx/ Ls programming manual (P/N 7004-961) for command syntax on bus calibration.
Phase offset calibration requires a phase meter for reference. See section 6.1 for recommended
equipment list.
For front panel calibration, proceed as follows.
1. Program the output frequency to 400 Hz.
2. Select the phase to be checked/calibrated (Phase B or C) using the PHASE key. Phase
A calibration is only relevant if the Lx/Ls unit is used in External Sync, Line Sync or LKS
mode. In that case, phase A offset is with respect to the external reference signal.
3. Program full-scale voltage and measure phase angle between phase A and B or A and C
using a phase meter.
4. Press the MENU key several times to display OUTP CAL, then press the ENTER key.
5. Again you must enter the password, which will be the value for the highest voltage range
and press ENTER.
6. Press the key to point to the PHASE OFST value. This will be the phase calibration
value for the phase selected.
7. Adjust the calibration value as needed while monitoring the external phase meter reading
so the output phase angle is calibrated. Press the ENTER key to save the calibration.
8. Repeat for the other phase.