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M-SV-001-EN Rev. G
5.3.1.4 BMCC Change
If a replacement BMCC is installed in a compressor, a calibration must to be performed, saved to
EEPROM, and repeated to match the BMCC to the specific compressor.
5.3.2 Performing a Calibration
Once opened, the Calibration Tool will automatically change the Compressor Control Mode to
Calibration Mode and send a delevitate shaft signal to the bearing control. It is necessary to verify the
control mode of the compressor after completing the calibration process.
A manual validation can be performed by clicking the Validate button. Validation uses the stored
calibration values to momentarily levitate the shaft and compares the values to tolerance limits.
5.3.2.1 Before Performing a Calibration
• Interlock must be open
• RS485 or other external compressor communication connection must be disconnected
5.3.2.2 Calibration
1. Open the SMT and connect to the compressor.
2. Open the Bearing Calibration tool. The Bearing Calibration tool displays. Refer to "Figure 5-2
Bearing Calibration Tool".
3. Click on the Start Calibration button.
• See the current Service Monitoring Tools User Manual for further instructions on
performing a calibration and validation.
Figure 5-2 Bearing Calibration Tool
If the message “Calibration Failed” or “Levitation Failed” appears when attempting to calibrate, it
indicates the steps expected by the SMT have not been completed. To determine the cause of failure,
verify the following:
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