MSA Orion G Operating Manual page 16

Chapter 3, Using the Orion G Gas Utility Instrument
When Self-test ends:
• Instrument enters the Measure mode
• Gas concentrations appear on the display (unless the
instrument is set up to come ON in "ticker mode").
A calibration check must be performed after switching battery
packs to assure accuracy of readings. Failure to perform
a calibration can result in serious personal injury or death.
Fresh Air Set Up Option
(for automatic zero adjustment of the Orion G Multigas and Leak
Detector sensors)
NOTE: The Fresh Air Setup (FAS) has limits. If a hazardous
level of gas is present, the Orion G Multigas and
Leak Detector ignores the FAS command and goes
into alarm.
Do not activate the Fresh Air Setup unless you are certain
you are in fresh, uncontaminated air; otherwise, inaccurate
readings can occur which can falsely indicate that a
hazardous atmosphere is safe. If you have any doubts as
to the quality of the surrounding air, do not use the Fresh
Air Setup feature. Do not use the Fresh Air Setup as a
substitute for daily calibration checks. The calibration check
is required to verify span accuracy. Failure to follow this
warning can result in serious personal injury or death.
Persons responsible for the use of the Orion G Multigas and
Leak Detector must determine whether or not the Fresh Air Setup
option should be used. The user's abilities, training and normal
work practices must be considered when making this decision.
1. Turn ON the Orion G Multigas and Leak Detector.
• Once the instrument self check is complete, the ZERO
flag flashes for 10 seconds.
2. To perform a Fresh Air Setup (FAS), push the ON/OFF-PAGE
button while the Zero flag is flashing.
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" WARNING
" WARNING
Operating Manual