744
HART Mode Users Guide
7.Proceed with calibration as usual (described in the 744 Users Manual).
8.Press the Adjust softkey. This returns you to HART mode, and presents you with the Service menu for the transmitter.
9.Do an Output Trim, a Sensor Trim, or both. These are Service Operations, and are described later in this manual. When you have finished with the trim procedures, press the Done softkey.
10.Press the As Left softkey and repeat the calibration procedure to verify that the transmitter passes.
pe15s.bmp
2.Press a softkey to command the transmitter to set its analog output to the corresponding value, or manually enter a value with the numeric keys.
Loop Test
The Loop Test feature sends a command to the transmitter to set its output stage to a specified value. Use this to check the calibration of the output stage, or to check for proper reading on an external loop reading device.
To perform a Loop Test:
1.From the Active Device screen Press the Service softkey, followed by Loop Test.
In the middle of the screen the transmitter acknowledges the selected PVAO (digital representation of the Output stage). The calibrator shows the measured value at the top of the screen, so you can use Loop Test as a quick way to check the calibration of the transmitter’s Output stage.
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