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8.5 Calibrating a Transmitter (Signal Converter)
To calibrate a transmitter both the upper and the lower displays will be used; one for
measuring the output, and one for sourcing the input. This section covers all but the
pressure transmitters. A RTD temperature transmitter is used in this example.
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 “RTD” from the Lower Mode list.
2. Select “Out” from the Test Mode list (input/output control).
3. Select “RTD” from the RTD Type list.
4. Select the upper display and select “Current” from the Upper Mode list.
5. Select “4 to 20mA” from the Range list.
6. To turn the loop power on, select “24V On” from the 24V Power list (loop power).
7. Connect the ASC-400 calibrator to the transmitter as shown in Figure 20.
8. Enter output values using the numeric keys or fine adjust using the ARROW keys.
9. Adjust the transmitter as necessary.
To calibrate different transmitter types, follow the above steps with the exception of
selecting the appropriate input type on the lower display.
Figure 20
Calibrating a Transmitter