Primax Ir+ Calibration - MSA PrimaX IR+ Operating Manual

5 Start-up and Calibration
Signal
NOTE: Before attempting calibration the device should be powered for at least 60 minutes to allow for temperature
stabilization.
The 4 - 20 analogue signal is available within 1 minute of power-on.
NOTE: It is recommended that all calibration components are connected before starting a calibration as it is necessary
to apply test gas at the appropriate time (→ Figure 17 ).
Although the device is factory-calibrated, it is good practice to calibrate the unit once it is installed in its final
environmental destination.
As with any type of gas monitor, the only true check of its performance is to apply gas directly to the sensor. New
sensors should be calibrated more often until the calibration records prove sensor stability. The calibration frequency
can then be reduced to the schedule set by the safety officer or plant manager.
For span gas selections see chapter 5.3 Calibration Kits.
5.2

PrimaX IR+ Calibration

The device can be calibrated using either the optional calibration cap locally at the sensor, or using the HART digital
interface.
NOTE: MSA recommends using a calibration gas value in the middle of the measuring range for optimum calibration.
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