Emerson Micro Motion 9739 MVD, Руководство по конфигурации и использованию

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Quick start with ProLink II
Important
The meter was zeroed at the factory, and should not require a field zero.
Note
Do not zero the flowmeter if a high-severity alarm is active. Correct the problem, then zero the
flowmeter. You may zero the flowmeter if a low-severity alarm is active.
Procedure
1. Choose ProLink→Calibration→Zero Calibration .
2. Modify Zero Time , if required.
Zero Time controls the amount of time the transmitter takes to determine its zero-flow reference point.
• A long zero time may produce a more accurate zero reference, but is more likely to result in
a zero failure. This is due to the increased possibility of noisy flow, which causes incorrect
calibration.
• A short zero time is less likely to result in a zero failure but may produce a less accurate zero
reference.
The default Zero Time is 20 seconds. For most applications, the default Zero Time is appropriate.
3. Click Perform Auto Zero to initiate the zero procedure.
The Calibration in Progress light will turn red during the zero procedure. At the end of the procedure:
• The Calibration in Progress light will return to green if the zero was successful.
• The Calibration Failure light will turn red if the zero procedure failed.
4. In case of failure, you have two options:
Option Description
Restore Prior Zero Restore Prior Zero restores the flowmeter to the
zero value it had just prior to starting the zero
procedure. If you close the Flow Calibration
window, you will no longer be able to restore
the prior zero.
Restore Factory Zero Restore Factory Zero is available only if you
ordered a transmitter and a sensor together.
3.8 Test or tune the system using sensor simulation
Sensor simulation allows you to set specific values or value ranges for mass flow, density, and
temperature. The transmitter will report the specified values and take all appropriate actions, e.g., apply
a cutoff, activate an event, or post an alarm. You can use this feature to test the system’s response to a
variety of process conditions, including boundary conditions, problem conditions, or alarm conditions, or
to tune the loop.
44 Micro Motion 9739 MVD Transmitters