Emerson Micro Motion 3711, Configuration And Use Manual, Page: 55 / 234

Configuration and Use Manual 47
Configuring the Core Interface
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4. The zero procedure is performed from the Mass Flow Calibration panel. On this panel:
a. Adjust the
Zero Time
parameter if required.
b. Click
Begin Meter Zero
.
5. Close the shutoff valve downstream from the sensor.
6. Ensure that the sensor is completely filled with fluid.
7. Ensure that the process flow has completely stopped.
8. On the Mass Flow Calibration panel:
a. Click Perform Zero . A “Zero Calibration in Progress” message is displayed.
b. Wait until the process is completed. Note:
• The zero will typically take longer than the configured zero time.
• ROCLINK 800 automatically switches to Auto Scan mode so that the messages will
be updated automatically. This affects only the zero procedure. When you close the
window, Auto Scan will return to its previous state (enabled or disabled).
• If you need to cancel the zero process, click Cancel Zero . The Model 3711 will use
the pre-existing zero values.
9. The results of the zero are displayed on the Calibration panel.
• If the zero was successful, a “Zero Calibration Successful” message is displayed, and the
Live Zero and Standard Deviation fields are updated with the new values.
• If the zero was unsuccessful, a message describing the cause of the failure is displayed.
Correct the condition, then repeat the zero procedure.
CAUTION
If fluid is flowing through the sensor, the sensor zero calibration may be
inaccurate, resulting in inaccurate process measurement.
To improve the sensor zero calibration and measurement accuracy, ensure that
process flow through the sensor has completely stopped.