MSA ALTAIR 4 Operating Manual page 16

DESCRIPTION
2.3.3 Minimum Readings (MIN page)
This page shows the lowest level of oxygen recorded by the instrument
since turn-ON or since the MIN reading was reset.
The minimum icon
To reset the MIN reading:
(1) Access the MIN page.
(2) Press the [ ] button.
2.3.4 Short Term Exposure Limits (STEL page)
If the STEL alarm activates, leave the contaminated area immediately;
the ambient gas concentration has reached the preset STEL alarm level.
Failure to follow this warning will cause over-exposure to toxic gases and
persons relying on this product for their safety could sustain serious
personal injury or death.
The STEL icon appears on the display to show the average exposure
over a 15-minute period.
When the amount of gas detected by the instrument is greater than the
STEL limit:
• Alarm sounds
Alarm LEDs flash
•
• STEL icon flashes.
To reset the STEL:
(1) Access the STEL page.
(2) Press the [ ] button.
The STEL alarm is calculated over a 15-minute exposure.
16
appears on the display.
WARNING
ALTAIR 4 - Operating Manual
MSA