GE Industrial Solutions Galaxy Verification - Manual (Page 62)

Galaxy Power System Verification Procedures
3 - 18 Galaxy Millennium Controller Performance Verification Procedures Issue 3 January 2008
Meter Calibration from the Front Panel, continued
Current
Calibration
The following procedure is applicable only in plants with Load shunts
in a plant configured for “Centralized Architecture.”
Step Action
1 Using a calibrated DVM, measure the plant load from the
sense connection points on the plant shunt(s).
2 To calculate the plant load, in amperes, as measured by the
DVM, divide the mV DVM reading by the rated shunt mV
value. Multiply this result by the shunt ampere rating. This
value is the plant load measured by the DVM, in amperes.
3 From the front panel press <MENU> → CONFIG → PLANT.
Using the Arrow keys, reset the plant current reading by
selecting RST PLI. Press the <ENTER> key to reset. This will
remove any pre-existing user calibrated values if they exist.
4 Press the <MENU> key, wait five seconds, and go back to the
CONFIG
→ PLANT screen. Move to ADJ PLI on the menu
and use the <ADJUST> keys to calibrate the plant load to
match the calculated plant load value. Press <ENTER> to use
the new calibrated plant load.
5 Press the <ESCAPE> key until the default screen is displayed.
Verify that the plant load reading reflects the new value.