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Reference Manual
00809-0100-4021, Rev FB
August 2011
4-21
Rosemount 3144P
F
OUN
DATION
F
ie
ldb
us
OPERATION
Overview
This section contains information on operation and maintenance procedures.
METHODS AND MANUAL OPERATION
Each F
OUNDATION
fieldbus host or configuration tool has different ways of
displaying and performing operations. Some hosts use DD Methods to
complete device configuration and display data consistently across platforms.
There is no requirement that a host or configuration tool support these
features.
In addition, if your host or configuration tool does not support methods this
section covers manually configuring the parameters involved with each
method operation. For more detailed information on the use of methods, see
the host or configuration tool manual.
Trim the Transmitter
Calibrating the transmitter increases the precision of the measurement
system. The user may use one or more of a number of trim functions when
calibrating. The trim functions allow the user to make adjustments to the
factory-stored characterization curve by digitally altering the transmitter’s
interpretation of the sensor input.
Figure 4-1. Trim
.
Application
: Linear Offset
Application
: Linear Offset and Slope Correction
Solution
: Single-Point Trim
Solution
: Two-Point Trim
Method
:
1. Connect sensor to transmitter. Place
sensor in bath between range points.
2. Enter known bath temperature using
the Field Communicator.
Method
:
1. Connect sensor to transmitter. Place
sensor in bath at low range point.
2. Enter known bath temperature using the
Field Communicator.
3. Repeat at high range point.
One-Point Trim
Two-Point Trim
Transmitter System Curve
Site-Standard Curve
R
esist
ance (
ohm
s)
Temperature
R
esist
ance (
ohm
s)
Temperature
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182