AIR SYSTEMS CO-91 Serie Sustitución Y Procedimiento De Calibración página 4

Use only 10-20ppm CO gas for calibrati on. Using a higher concentrati on may decrease accuracy at
lower scale readings. Note: 10ppm gas must be used to sati sfy Canadian calibrati on requirements.
SteP 1)
Install regulator on the CO calibrati on gas cylinder.
SteP 2)
Turn the knob on the regulator counterclockwise to
allow the fl ow of gas thru the hose. Verify fl ow of
gas thru the hose via touch or sound.
SteP 3)
Connect the plug to the air sample inlet on the
monitor.
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cAliBrAtion ProceDUre
co monitor Span Adjustment
SteP 4)
Allow digital readout to stabilize 15-30 seconds.
SteP 5)
Adjust the "span" adjustment screw (clockwise to
increase or counterclockwise to decrease) unti l the
digital readout reads the same as the concentrati on
(ppm) as printed on the calibrati on gas cylinder.
SteP 6)
Turn the regulator off and repeat the "zero" adjust-
ment procedure. The digital readout should return
to a "00" reading.
The monitor is now calibrated and should be
recalibrated monthly or if accuracy is questi on-
able. Check local requirements and recalibrate as
required.