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VI. TROUBLESHOOTING
No Power To Instrument
There are two common causes for the unit to not power up when the POWER
switch is pressed for three seconds.
The most common is that the batteries are dead. Try replacing the batteries
with new alkaline batteries or try powering the unit from the AC power
adapter.
The second most frequent cause for no power to the instrument is a blown
protective fuse.
This fuse can be shorted out if the batteries have
been removed from the instrument with a metallic object such as a
screwdriver.
If the protective fuse has been blown contact the factory.
“Flow too low” / “Flow too high”
accompanied by an audible beep.
Accurate air flow is critical to an accurate gas mixture. The microprocessor
and built-in precision mass flow sensor continuously monitor the air flow.
If, however, a flow problem develops (e.g. air blockage or kinked tubing)
which cannot be corrected within ten seconds, the unit will display “Flow
too low.” If the problem cannot be cleared after an additional minute, the
instrument will enter the purge mode and then power down.
If the pump was not disabled prior to attaching an external pump device, or
the sample draw flow rate is greater than 5.0 LPM, the unit will display “Flow
too high.” If the problem is not cleared within one minute, the instrument
will enter purge mode as above.
