9
Model 850 Operation
Electronic Purge
• The
Electronic Purge
feature permits a rapid recovery of
the sensor element.
• After the Model 850 has detected the presence of an
accelerant, simply slide the
Purge Switch
to the
ON
position; the
Yellow Purge Indicator Light
will glow Red.
• Leave the
Purge Switch
in the
ON
position for 15 to 30
seconds. There may be rapid beeping as the sensor burns
off residual vapors.
• After 15 to 30 seconds, slide
Purge Switch
to
OFF
position.
• The unit will rapidly cease to annunciate and the Model 850
is now ready to detect another sample.
• Before attempting to detect another sample: Turn
Purge
Switch OFF
and reset sensitivity.
Purge
Switch