Emerson 20002158 Manuel D’Utilisation
•
There are no pipe run requirements for Micro Motion sensors. Straight runs of pipe
upstream or downstream are unnecessary.
upstream or downstream are unnecessary.
•
If the sensor is installed in a vertical pipeline, liquids and slurries should flow upward
through the sensor. Gases may flow upward or downward.
through the sensor. Gases may flow upward or downward.
•
Keep the sensor tubes full of process fluid.
•
For halting flow through the sensor with a single valve, install the valve downstream
from the sensor.
from the sensor.
•
Minimize bending and torsional stress on the meter. Do not use the meter to align
misaligned piping.
misaligned piping.
•
The sensor does not require external supports. The flanges will support the sensor in
any orientation. (Some sensor models installed in very small, flexible pipeline have
optional installation instructions that allow for external supports.)
any orientation. (Some sensor models installed in very small, flexible pipeline have
optional installation instructions that allow for external supports.)
1.3
Temperature limits
•
Sensors can be used in the process and ambient temperature ranges shown in the
temperature limit graphs. For the purposes of selecting electronics options,
temperature limit graphs should be used only as a general guide. If your process
conditions are close to the gray areas, it may be inappropriate to use electronics
options other than a junction box. Consult consult with your Micro Motion
representative.
temperature limit graphs. For the purposes of selecting electronics options,
temperature limit graphs should be used only as a general guide. If your process
conditions are close to the gray areas, it may be inappropriate to use electronics
options other than a junction box. Consult consult with your Micro Motion
representative.
•
In all cases, the electronics cannot be operated where the ambient temperature is
below –40 °F (–40 °C) or above +140 °F (+60 °C). If a sensor is to be used where the
ambient temperature is outside of the range permissible for the electronics, the
electronics must be remotely located where the ambient temperature is within the
permissible range, as indicated by the shaded area of the temperature limit graphs.
below –40 °F (–40 °C) or above +140 °F (+60 °C). If a sensor is to be used where the
ambient temperature is outside of the range permissible for the electronics, the
electronics must be remotely located where the ambient temperature is within the
permissible range, as indicated by the shaded area of the temperature limit graphs.
•
Temperature limits may be further restricted by hazardous area approvals. Refer to
the hazardous area approvals documentation shipped with the sensor or available
from the Micro Motion web site (
the hazardous area approvals documentation shipped with the sensor or available
from the Micro Motion web site (
).
•
The extended-mount electronics option allows the sensor case to be insulated
without covering the transmitter, core processor, or junction box, but does not
affect temperature ratings.
without covering the transmitter, core processor, or junction box, but does not
affect temperature ratings.
Planning
Installation Manual
3