Measuring Gas Concentrations; Combustible Gases (% Lel) (Figure 3-5) - MSA Sirius Mode D'emploi

1. Turn ON the Sirius Multigas Detector in clean, fresh air.
2. Verify that readings indicate no gas is present.
3. Attach regulator (supplied with calibration kit) to the cylinder.
4. Connect tubing (supplied with calibration kit) to the regulator.
5. Attach other end of tubing to the instrument.
6. Open the valve on the regulator, if so equipped.
• The reading on the Sirius Multigas Detector display should be
within the limits stated on the calibration cylinder or limits
determined by your company.
• If necessary, change cylinder to introduce other calibration
gases.
• If readings are not within these limits, the Sirius Multigas
Detector requires recalibration. See Chapter 5, Calibration.
NOTE: The presence of other calibration gases may cause the PID to
underrange, indicated by dashes for the displayed VOC read-
ing.

Measuring Gas Concentrations

Combustible Gases (% LEL) (FIGURE 3-5)

Figure 3-5a. Instrument in LEL Alarm
3-10