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Millennium SC_MAN
Rev 2.0
Step
Action to Calibrate Current
NOTE
The following procedure is applicable only in plants with Load shunts in a plant configured
for
“
Centralized Architecture.
”
1
Measure the plant load from the sense connection points on the plant shunt(s).
Use a calibrated DVM.
2
Calculate the plant load, in amperes, as measured by the DVM.
a) Divide the mV DVM reading by the rated shunt mV value
b) Multiply this result by the shunt ampere rating
This value is the plant load measured by the DVM, in amperes.
3
Reset the Plant Current reading by selecting RESET LOAD.
Use the Meter Calibration Menus. Press the Enter key to reset the Load.
This will remove any pre
-
existing user calibrated values if they exist.
4
Wait at least 5 seconds and press the ESCAPE key.
5
Select CALIBRATE LOAD. Use the Arrows, and UP/DOWN keys to calibrate the system Load.
Press ENTER to save.
NOTE: The maximum total change is +/
-
10% of the current load value.
6
Press the <ESCAPE> key until the default screen is displayed.
Verify that the plant current reading has been changed.
NOTE: This operation is performed and verified ONLY if plant load is constant during the
calibration procedure.
7
Observation:
•
Displayed System load changes to new value.
High Float Voltage Alarm –
New Installations
Step
Action to Test the High Float Voltage Alarm
New Installations
NOTE
Clear all controller alarms for this test.
NOTE
The high voltage alarm test is completed by raising the plant voltage above the threshold
set for HFV (High Float Voltage).
NOTE
Raising the plant voltage on a working system is left to the discretion of the user.
•
This test could disrupt power to working equipment.
•
If the test is performed, verify that the plant is in FLOAT mode
•
Rectifier voltage has been set to the normal level after completing the test.
1
Record the High Float Alarm threshold value here _________ V.
Use the Voltage Alarms Menu Screens.
2
Record the value here ________V.
Use the Float Settings Menu Screens, select Set Point and Use the Voltage Alarms Menu
Screens.
NOTE
The next step WILL RAISE the system voltage.