MSA PrimaX IR, Руководство по эксплуатации

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PrimaX® IR
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Start-up and Calibration
GB
When a Zero or Span calibration failure occurs, the device reverts back to its previous successful cali-
bration settings.
If the calibration cap is left on for more than 15 minutes after calibration concludes, the 4 to 20 mA
signal indicates Fault status.
When the calibration cap battery is nearing the end of its useful life, the LCD will display all the icons
in a series of rapid flashes at power-up before it starts the normal calibration cycle. The battery is non-
serviceable and the calibration cap would need to be replaced once the battery is depleted.
WARNING!
The calibration cap must be removed from the device after completing the Zeroing and/or Spanning
procedure; otherwise, the sensor cannot perform properly.
HART Calibration Procedure
The device can be calibrated using a HART compatible communications interface with Device Descrip-
tion capability (DD), such as the Emerson 375 or 475 Field Communicator (see Fig. 8). Ensure that the
HART hand-held communicator is compatible with the area classification. This hand-held HART
communicator must be HART revision 7.0 compliant and can be obtained from a HART authorised
supplier. See the PrimaX IR HART specification found on the product CD for the calibration command
definitions or visit the MSA website at
www.MSAsafety.com .
Calibration can also be performed via the HART interface with optional screen inserts in the Environ-
mental Guard. As shown in Fig. 16, the environmental guard can be fitted with these screens that will
allow the calibration gas to be retained in the enclosure long enough for a valid zero and/or span
reading to be obtained under still-air conditions of less than 1 m/s.
CAUTION!
Use of these inserts will increase the sensor response time to ambient gas conditions up to
210 seconds. Ensure that the operational conditions are appropriate for use of these screens.