12
Reference Manual
00809-0100-4853, Rev AB
Configuration
January 2017
Configuration
User-defined process temperature sensor limits
Process temperature sensor limits can be changed to allow early detection of RTD failures. When the
limits are exceeded, the transmitter will display a Process Temperature Out of Limits alert in the
transmitter status, set the PT measurement status to uncertain, and will stop using the measured
temperature value in the flow calculation. See
for more information on
configuring the process temperature mode for mass flow.
Enable/disable process temperature
Using the PT Measurement parameter, the process temperature measurement can be disabled to
prevent undesired diagnostic alarms and local display screens. This feature may be useful if the process
temperature option was ordered but will not be used or if the RTD in use has failed and a replacement is
not readily available.
When the process temperature measurement is disabled, the process temperature measurement status
will be “bad”. If using mass flow calculations, set the mass flow’s process temperature mode to
Fixed
to
allow calculations to continue. Once an RTD is available and wired, set the PT Measurement to
Enabled
and the process temperature mode to
Normal
to allow the live reading to be used for mass flow
calculations.
2.4.6
Variable simulation
The following configuration items are found in the AI Block.
Simulate replaces the channel value coming from the Sensor Transducer Block. For testing purposes, it is
possible to manually drive the output of the Analog Input Block to a desired value. There are two ways to
do this.
Manual mode
Complete the steps below to change only the
OUT_VALUE
and not the
OUT_STATUS
of the AI Block.
1. Set the block mode to
Manual
.
2. Change the
Output Value
to the desired value.
3. Restore the original block mode when finished.
Simulate
1. If the simulate switch on the electronics board is in the
Disabled
position, move it to the
Enabled
for more information.
2. Set the
Simulate En/Disable
parameter to Active.
3. Enter the desired
Simulate Value
and
Status
. Make sure the block mode is
Auto
to see the value
propagate through the block.
4. Set the
Simulate En/Disable
parameter back to
Disabled
when finished simulating.
Summary of Contents for Rosemount MultiVariable 3051SMV
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