2-2
Analyzer Screen Display Features
•
Hydrocarbons, HC, measured in parts per million
•
Lambda,
λ
, or on the same display Air Fuel Ratio, AFR, a
numeric number
— For additional information refer to
Lambda and AFR
Calculation‚ page 2-4
.
•
Engine speed, RPM X, or oil temperature, select preferred value
by toggling the icon on the lower right of the screen. Engine
speed measured in revolutions per minute, and oil temperature
measured in degrees Fahrenheit.
CO Corrected
The
DGA 1000 Gas Analyzer
performs a CO measurement
correction when CO and CO
2
are less than (<) 15% for gasoline.
See
Figure 2-2
. This correction may be required for vehicles with
an air leak in the vehicle exhaust system. While the correction may
not always be required, the analyzer performs the CO correction
when necessary to provide the most accurate measurements
possible.
The following are some examples of CO and CO
2
measurements:
— CO + CO
2
<15
Formula:
CO CORRECTED (CO
c
) =
CO X 15
CO + CO
2
READ
As an example using
Figure 2-2
.
OR
CO = 3 CO =3
CO
2
= 6 CO
2
=13
CO
c
= 5 CO
c
=3
✓
Converter equipped vehicles will effect CO
c
values.
✓
The formula for CO Corrected changes depending on the
fuel type selected. Values by fuel type are:
— Gasoline 15%
— Methane 12%
— LPG 14%
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