Ametek Jofra ASC-400, Справочное руководство, Страница: 51 / 69

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8.6 Calibrating a Pressure Transmitter (loop powered 4-20 mA)
To calibrate a pressure transmitter both the upper and the lower displays will be used;
upper for measuring the output, and lower for pressure measurement.
Follow the principle of navigating through the functions described in the guidelines in
section 4.2 and proceed as follows :
1. Select the lower display and select “Pressure” from the Lower Mode list.
2. Select the upper display and select “Current” from the Upper Mode list.
3. Select “4 to 20mA” from the Range list.
4. To turn the loop power on, select “24V On” from the 24V Power list.
5. Connect the ASC-400 calibrator to the transmitter and the pressure module as
shown in Figure 21.
6. Zero the pressure module.
7. Test the transmitter at 3 or more points of the span to prove hysteresis.
8. Adjust the transmitter as necessary.