GxT Ferret 54 ENGINE DIAGNOSTIC CENTER - Manual (Page 69)

O2 TEST
Voltage from the vehicle O2 sensor is monitored for crossings per second through the
stoichiometric point (0.45v), indicating rich and lean conditions. Recent minimums and
maximums are shown and used to generate a graph. The number of crossings per second
indicate the activity level of the system. Carbureted engines normally show at least 3 crossings
per second. Fuel Injected engines, which respond more quickly, may show 10 or more. When
the signal is active (more than 2 crossings per second), the percent of time in the rich zone is
given. The stoichiometric point is marked by the symbol for lambda
(λ
).
3.2 Cross/Sec 190û 52% Duty Rich
Min Volt Max
0.31 0.55 0.72
L ¤¤¤¤Œ¤¤¤¤¤¤ R
O2 TEST with EMISSIONS
Emissions values ( HC, CO, CO2 and O2 ) are shown with the O2 Sensor readings. Time
and a memory used indicator are also shown. Recording can only be done from this screen.
3.2 Crossings/Sec HC 552ppm F
Min Volt Max CO 0.34% ü
0.31 0.55 0.72 CO2 3.9% ~ Eÿ
¤¤Œ¤¤¤ O2 1.2% 12:31:48
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