Rosemount 4600, Справочное руководство

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Reference Manual
00809-0100-4022, Rev AA
July 2002
Model 4600
3-6
CHECK OUTPUT
Before performing other transmitter on-line operations, review the digital
output parameters to ensure that the transmitter is operating properly and is
configured to the appropriate process variables.
Process Variables
The process variables for the Model 4600 provide transmitter output, and are
continuously updated. The pressure reading in both engineering units and
percent of range will continue to track with pressures outside of the defined
range from the lower to the upper range limit.
HART Communicator
The process variable menu displays the following process variables:
• Pressure
• Percent of range
• Analog output
• Sensor temperature
• Scaled Variable (SV)
NOTE
Regardless of the range points, the Model 4600 will measure and report all
readings within the digital limits of the sensor. For example, if the 4 and
20 mA points are set to 0 and 1,000 psi, and the transmitter detects a
pressure of 2,500 psi, it digitally outputs the 2,500 psi reading and a 250% of
span reading. However, there may be up to ±5.0% error associated with
output outside of the range points.
AMS
Right click on the device and select “Process Variables...” from the menu.The
process variable screen displays the following process variables:
• Pressure
• Percent of range
• Analog output
• Sensor temperature
• Scaled Variable (SV)
Sensor Temperature
The Model 4600 contains a temperature sensor near the pressure sensor in
the transmitter. When reading this temperature, keep in mind that this is not
an accurate indicator of process temperature.
HART Communicator
Enter the fast key sequence below “Sensor Temperature” to view the sensor
temperature reading.
AMS
Right click on the device and select “Process Variables...” from the menu.
“Snsr Temp” is the sensor temperature reading.
Fast Keys
1, 1
Fast Keys
1, 1, 4