Minimum Readings (Min); Short Term Exposure Limits (Stel) - MSA SIRIUS Manuel D'instructions

4 Measuring Gas Concentrations
4.2.2 Minimum Readings (MIN) (Figure 11)
This page shows the lowest level of oxygen recorded by the SIRIUS Multigas Detector
since:
• Turn-ON or
• MIN reading was reset.
• MIN appears in the upper portion of the display.
To reset the MIN Reading:
1. Access the Min page.
2. Press the RESET/
4.2.3 Short Term Exposure Limits (STEL) (Figure 12)
The STEL flag appear in the upper portion of the display to show the average exposure
over a 15-minute period. When the amount of gas detected by the SIRIUS Multigas
Detector is greater than the STEL limit:
• Alarm sounds
• Alarm lights flash
• STEL flashes.
To Reset the STEL:
1. Access the STEL page.
2. Press the RESET/
WARNING!
If the STEL alarm condition is reached while using the instrument as a personal or area
monitor, leave the contaminated area immediately; the ambient gas concentration has
reached the preset STEL alarm level.
24
button.
button.
Figure 11:
Peak Readings
and Minimum Readings
for Oxygen on Display