Measure current from an externally-powered transmitter device with
test terminals
Figure 4-12:
The Trex unit measures current from the mA terminals on an externally-powered loop without breaking
the loop and connecting the ammeter (mA terminals) in-series.
WARNING!
Do not insert a resistor in parallel with either the HART + pwr or HART terminals on the Trex unit, or
in parallel with the device's communication terminals. This will interfere with the current
measurements.
Note
Please review your device documentation for additional information about reading current from the test
terminals. The orientation of the terminals on your device may be different. The drawing below is an
example.
A.
Voltage source
Loop Diagnostics application
User Guide
135
Содержание AMS Trex
Страница 1: ...User Guide Rev 3 August 2017 AMS Trex Device Communicator User Guide ...
Страница 8: ...Contents vi User Guide ...
Страница 130: ...Field Communicator application 122 User Guide ...
Страница 186: ...Fieldbus Diagnostics application 178 User Guide ...
Страница 198: ...Technical specifications 190 User Guide ...
Страница 206: ...Glossary 198 User Guide ...