MSA Orion G Mode D'emploi page 21

Chapter 3, Using the Orion G Gas Utility Instrument
2. Once gas readings are
displayed, plug the free
end of the sampling line
or probe.
• The pump motor
shuts down and an
alarm sounds
(FIGURE 3-3)
• The pump indicator
will illuminate
• The readings on the
display may change.
3. When the pump inlet,
sample line or probe is
blocked, the pump
alarm must activate.
If the alarm does
not activate:
a. Check the pump, sample line, and probe for leaks.
b. Once the leak is fixed, recheck the pump alarm by
blocking the flow.
4. Check the pump before each day's use.
Do not use the pump, sample line, or probe unless the
pump alarm activates when the flow is blocked. Lack of an
alarm is an indication that a sample may not be drawn to
the sensors, which could cause inaccurate readings. Failure
to follow the above can result in serious personal injury
or death.
Never let the end of the sampling line or probe touch or
go under any liquid surface. If liquid is sucked into the
instrument, readings will be inaccurate and the instrument
could be damaged. We recommend the use of an MSA Sample
Probe (P/N 10038910, or equivalent) containing a special
membrane filter, permeable to gas but impermeable to water,
to prevent such an occurrence.
3-6
Figure 3-3. Pump Alarm on the
" WARNING
" WARNING
Operating Manual
Display