NUT-JAM 2H3786 - Caterpillar

Calibration of the System Voltage MMS
You must calibrate the system voltages in the MMS system whenever you replace the following:
AC Interface PWA (PCC)
APS PWA (APC)
Parallel Controller Cabinet PWA (PCC)Note: Calibrating the "system out currents" is required.
Place the UPS into Maintenance Bypass.Refer to Systems Operation, Testing and Adjusting, RENR9988, "SMS Internal and Maintenance Bypass".Refer to Systems Operation, Testing and Adjusting, RENR9988, "MMS Internal and Maintenance Bypass".
Turn the "selector switch" for UPSView in the system cabinet to position 1. You will be communicating with MMU 1.
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"Selector Switch" for UPSView Note: Refer to the Systems Operation, Testing and Adjusting, RENR9988, "Personal Computer to UPS Connection" in order to connect to the UPS and to login to the UPS.
Click on the "Calibrate" drop-down menu and Select "System Voltages".A "Calibration of a Channel" window will open.
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"System Voltages"
Click on the "View Status" button. Another "Calibration Status" window will open. Drag the window aside if the window blocks your view of "Calibration of a Channel" window.
Click on "Use Defaults" on "Calibration of a Channel" window.You will be prompted to "Enter Calibration Point for System Input Line Volts AB".
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"System Input Voltage"
Measure the "System input Voltage" from "Phase A" Bus to "Phase B" Bus. Enter this value in "Enter Calibration Point" field. Click "OK".The system will process the Calibration. The system will automatically prompt the user to "Enter Calibration Point" for "System Input Line Volts BC".The "Calibration Group Status" window will Display "Calibration complete but not saved" for "System Input Line Volts AB".
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"System Input Lines"
Measure the "System input voltage" from "Phase B" Bus to "Phase C" Bus and enter this value in "Enter Calibration Point" field. Click on "OK".The