3. Start the zero procedure and wait until it completes.
When the calibration is complete:
• If the zero procedure was successful, a Calibration Success message and a new zero value are
displayed.
• If the zero procedure failed, a Calibration Failed message is displayed.
Postrequisites
Restore normal flow through the sensor by opening the valves.
Need help?
If the zero fails:
• Ensure that there is no flow through the sensor, then retry.
• Remove or reduce sources of electromechanical noise, then retry.
• Set Zero Time to a lower value, then retry.
• If the zero continues to fail, contact customer service.
• If you want to restore the most recent valid value from transmitter memory:
— Using the display: Menu > Service Tools > Verification and Calibration > Meter Zero > Restore Zero >
Restore Previous Zero
— Using ProLink III: Device Tools > Calibration > Smart Zero Verification and Calibration > Calibrate
Zero > Restore Prior Zero
— Using the Field Communicator: Not available
• If you want to restore the factory zero:
— Using the display: Menu > Service Tools > Verification and Calibration > Meter Zero > Restore Zero >
Restore Factory Zero
— Using ProLink III: Device Tools > Calibration > Smart Zero Verification and Calibration > Calibrate
Zero > Restore Factory Zero
— Using the Field Communicator: Service Tools > Maintenance > Calibration > Zero Calibration >
Restore Factory Zero
Restriction
Restore the factory zero only if your meter was purchased as a unit, it was zeroed at the factory, and you are
using the original components.
Related information
Verify the zero
12.2.1 Terminology used with zero verification and zero calibration
Term
Definition
Zero In general, the offset required to synchronize the left pickoff and the right pickoff under
conditions of zero flow. Unit = microseconds.
Factory Zero The zero value obtained at the factory, under laboratory conditions.
Configuration and Use Manual Measurement support
MMI-20048166 April 2019
Configuration and Use Manual 133
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