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 “Mass flow” on page 10 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
position. See “Set the switches” on page 24 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.
To Next Page
Loading...
Need help?
General
