23/04/2019
Rev 3
31
II.5.5.Preparation to measurement
- Tachometer
Install the sensor, then press the operating speed key to determine the appropriate mode. This
mode is automatically saved. The value of the operating speed must immediately appear.
- Oil or engine temperature
Replace the oil level measurement gauge with the oil temperature sensor. Adjust the probe
length in order for it to soak into the oil when the sealing cone acts as a stopper. The engine must
be warm before any measurement.
- Gas measurement
Insert the sampling probe as far as possible in the exhaust gas exit tube. The minimum depth,
when the layout allows it, is 30 cm. If this condition cannot be fulfilled, it is necessary to use a
collector tube that acts as an exhaust system extension.
In exhaust systems with a single exhaust pot, but provided with two exit tubes, it is necessary to
use a collector tube into which the probe is inserted.
For analysis of the catalytic converter gases upstream, the entire length of the flexible sampling
tube must be used.
Start the measurement by pressing the PUMP key (if the pumps are not on).
Start the engine. Before the probe is inserted, it is preferable to activate the pumps and to wait
for zeroing to finish before inserting the sampling probe as indicated above.
II.5.6.Analysis and measurement
Automatic calibration is then engaged. The pump starts running and the following message is
displayed on the screen: “ZERO IN PROGRESS”.
After this period, the LCD screen will show the following message: “Measurement in progress,”
the results of each measurement will appear on the displays, the system is then ready to carry out
a measurement (concentrations must be similar to those in air: 0% for CO, CO
2
, 0 ppm vol. for HC,
20.9% for O
2
.)
The equipment is ready to be used. It is recommended that a seal integrity test is performed in
order to verify that the probe is correctly installed and that the equipment has not be damaged
during transport.
