PrimaX® IR
25
Start-up and Calibration
GB
When supplying tubing to the environmental guard to allow remote HART calibration, gas should be
delivered to both ports of the environmental guard from a 1.5 l/min regulator as shown in figure 16:
Fig. 16
HART calibration set-up
When used under windy conditions >1 m/s, a calibration cover must be used instead of the environ-
mental guard while applying the zero and span gas. Gas should be applied at 1.5 l/min. See Fig. 16 for
a picture of the calibration cover.
Fig. 17
HART Calibration Cover
WARNING!
Ensure that the calibration cover is removed after calibration is complete. This cover is intended to
block the flow of ambient air into the sensor during calibration, and in normal operation must ALWAYS
be removed
For applications where access to the HART signal is needed in hazardous areas, MSA provides the
HART Module as shown in Fig. 18
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Screens
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