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HART Mode
Calibrate a Supported HART Transmitter
15
10. Do an Output Trim, and/or a Sensor Trim. These are
Service operations. See “Output Trim” and “Service
Trim”. When you are done with the trim procedures,
push the Done softkey.
11. Push the As Left
softkey and do the calibration
procedure again to make sure that the transmitter
passes.
Loop Test
The Loop Test feature sends a command to the
transmitter to set its output block to a specified value. Use
this to examine the calibration of the output block, or to
verify a correct indication on an external loop reading
device.
To do a Loop Test:
1. From the Active Device screen, push the Service
softkey, followed by Loop Test. See Figure 14.
gnx15s.bmp
Figure 14. Loop Test Screen
2. Push a softkey to command the transmitter to set its
analog output to the related value, or manually record
a value with the numeric buttons.
The transmitter acknowledges the selected PVAO (digital
representation of the Output stage) in the middle of the
screen. The Product shows the measured value at the top
of the screen so you can use Loop Test as a fast
procedure to check the calibration of the transmitter’s
Output block.
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