Simulate A Transmitter On An Externally-Powered Loop For A Loop Check - Emerson AMS Trex User Manual

Loop Diagnostics application
2.
4.11.3 Simulate a transmitter on an externally-powered loop
for a loop check
The Loop Diagnostics application can control current to simulate a 2-wire transmitter on
an externally-powered loop. In this setup, the digital control system is powering the
current loop and the Trex unit is controlling the current that is input into the digital control
system.
Procedure
1.
146
The Trex unit can be connected at various point along the loop to measure current.
Figure 4-18: Example connection for measuring current
A. Analog output.
In the Loop Diagnostics application, view the measured current at the top of the
screen.
Connect the lead set to the HART terminals on the Trex unit and to the powered
4-20 mA current loop.
User Guide