◆
The calibrator will automatically switch to the suitable range if needed.
3.5.4 Calibrating HART transmitters
1. Connect
◆
Connect the calibrator to the HART transmitter as shown in Figure 3-13 and Figure 3-22 in the internal series
resistor and internal 24V loop power mode.
2. New
◆
Measure signal:
1) HART.
2) Process variable: HART-PV, HART-AO, HART-%, Loop mA.
◆
Transfer function.
1) Linear: the output and measure are both linear.
2) Square root: when the process variable is AO or loop mA, the output is linear, but the measure is square root.
◆
The other introduction is similar with calibrating a common pressure transmitter (Section 3.5.3).
3. Run
◆
Poll HART devices automatically if needed or press to do it manually (Section 3.2.1).
◆
Compare the range of the task settings with the real range of the HART transmitter.
◆
If the process variable is HART-AO, HART-% or Loop mA, the transfer function of the HART transmitter will be
changed to the same as the transfer function of the task settings.
◆
HART disconnection will cause the task to end.
◆
The other introduction is similar with calibrating a common pressure transmitter (Section 3.5.3).
4. Service
◆
As found data is the task result showing the condition of a HART transmitter before it is calibrated.
◆
Press to trim the HART transmitter (Section 3.2.4).
◆
Press to restart the task after servicing, and the result is recorded as left.
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