If you change testing environments, let the
analyzer acclimate to the new ambient envi-
ronment, then power down and restart.
After the 1-minute auto-zeroing phase, the instrument switches
to Gas Analysis mode. The measurement values can be viewed
on 3 display pages: a zoomed in 4-line display and 2 full 9-line
displays. All line items are user-selectable (see Display Values
below). Press Up/Down to scroll between the pages.
Bypass Switch (Pro IN)..Turn on/off fresh air bypass to purge
Info Screen (Pro Easy)....View diagnostic info on Control screen
Quick Print............Prints on-screen measurement values
CO Bypass.............Manually turn on/off CO bypass pump
Display Lines.......Choose measurement values to display by
pressing F4 then Up/Down/Right/Left
To change F1 hotkey from default, go to
Adjustments > Internal > F1 Hotkey
Turn on CO bypass pump to protect CO
sensor from high concentrations
Pump automatically activates at 4000ppm!
To change F4 hotkey from default, go to
Adjustments > Internal > F4 Hotkey
Control Screen (Pro Easy)
Purge Valve On/Off (Pro IN)
<F1>
Tip: To apply O2 correction, go
to Adjustments>Ref. O2 and input
your O2 correction % value. Then
go to Adjustments>Unit & change
unit to ppm %O2 corrected.
CO Bypass
Pump ON/OFF
<F3>
O2 8.2 %
CO 431 ppm
NO 126 ppm
NO2 65 ppm
Tip: If you are in a
cold environment, you
may need to use a
heated probe. Go to
Adjustments>Internal
‘>Probe Heating>F1 to
‘’’ turn on and off.
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