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134 Micro Motion
®
Series 3000 MVD Transmitters and Controllers
Startup Procedures
4. If there are any active alarms, the alarm category will be displayed in the alarm bar. To view,
acknowledge, or respond to the alarms, see Chapter 22.
Note: Series 3000 transmitters are ready to begin measurement approximately one minute after
power-up (time varies with models). However, approximately ten minutes are required for the
electronics to warm up to equilibrium. During this ten-minute period, the transmitter may exhibit
minor instability or inaccuracy.
16.2.1 Communication methods after power-up
After power-up:
• Communication via the display is available as soon as the display is visible.
• If you are using the Communicator, or ProLink II with HART/Bell 202, you can establish
communication with the Series 3000 device immediately after power-up, using the primary
mA output terminals. See Appendix G for more information on using ProLink II and
Appendix H for more information on using the Communicator.
• If you are using ProLink II via the RS-485 physical layer, the RS-485 terminals are available
to establish a connection in service port mode for 10 seconds immediately after power-up. If
no service port connection is made during this period, the terminals are automatically reset to
the configured RS-485/Modbus communication parameters. Be sure to set the ProLink II
connection parameters appropriately.
16.3 Sensor zero
Note: This section is not applicable to Model 3300 or Model 3350 controllers.
Zeroing the flowmeter establishes the flowmeter’s point of reference when there is no flow. The meter
was zeroed at the factory, and should not require a field zero. However, you may wish to perform a
field zero to meet local requirements or to confirm the factory zero.
When you zero the flowmeter, you may need to adjust the zero time parameter. Zero time is the
amount of time the transmitter takes to determine its zero-flow reference point. The default zero time
is 20 seconds.
•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.
For most applications, the default zero time is appropriate.
Note: Do not zero the flowmeter if a fault alarm is active. Correct the problem, then zero the
flowmeter. You may zero the flowmeter if a low-severity alarm is active. See Section 22.6 for
information on viewing transmitter status and alarms.