MSA SIRIUS Instruction Manual page 32

5 Setting up the SIRIUS Multigas Detector
Press the ON/OFF button to acknowledge the warning and to continue.
• Display reading will flash between the reading and "ppb" for readings less than
9900 ppb (9.9 ppm).
• Select OFF for PPM
• Response Factor Page (turns the RF Page ON or OFF)
• Response Factor Save (if OFF, instrument always returns to Isobutylene at turn-ON)
• Response Factor Favorites:
Select the five favorite VOC gases for quick selection when changing response
factors (See 4.3 PID Setup)
• Response Factor Change (see 4.3 PID Setup).
NOTE:
Alarm values for PID have limits based on sensor performance. The Low alarm, STEL,
and TWA cannot be set below 2.0 ppm and High alarm cannot be set below 10 ppm.
WARNING:
It is very important to have an understanding of PID basics when changing your PID
settings. Failure to properly identify the VOC gas being measured and/or failure to select
the correct Response Factor alarm values (exposure, STEL, TWA) that match your desired
Response Factor and/or the correct bulb, will result in erroneous readings.
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