Snap-On Diagnostics DGA 1000, Manual, Page: 72 / 116

4-4
Maintenance
There are a number of functions in the Maintenance Menu. Some
may be used to insure analyzer performance, some that should not
be used and some that cannot be used.
The following choices are available on the Maintenance Menu:
1
Leak Check Vacuum
2 Leak Check Gas
3 Gas Calibration Check
—Values
CO , HC CO
2
— HC Represents: Propane/Hexane
—
λλλλ
calculated for: Gasoline/Natural Gas Propane
—Warnings/Errors
4 O
2
/Check Install
5 Gas Tag Values
6 Gas Calibration
✓
These two items cannot be accessed in normal set-up.
1– Leak Check Vacuum
This test checks if there is an air leak in the sample system of the
analyzer. Follow the instructions on the screen. In this test the
exhaust sample probe must be blocked with the exhaust probe
sealing tool, part number 0787-0035. The pump pulls a vacuum
and the analyzer checks for any leaks in the system.
Seal the probe as instructed on the screen. The test will proceed
automatically and display the results.
If a failure occurs, disconnect the hose at the analyzer and repeat
the procedure. If a pass occurs, fix hose and probe. If a fail occurs,
check primary filter and then contact your Service Representative.
2–Leak Check Gas
Not for U.S.A.
This test checks if there is an air leak in the sample system of the
analyzer. Follow the instructions on the screen. In this test the
exhaust sample probe must be inserted into the exhaust of the
vehicle. The pump draws exhaust gases into the system. Then the
exhaust sample probe must be blocked with the exhaust probe
sealing tool, part number 0787-0035. The system checks if the
CO
2
value changes. When the CO
2
change exceeds a certain
value, an air leak is present in the system.
3–Gas Calibration Check
Using the optional regulator, the Gas Calibration Check allows the
flow of calibration gas into the calibration port so the accuracy of
the analyzer can be determined. The resulting values that display
on the screen are “live” as calibration gas flows into the port and
should match gas bottle values within ±5%.
Set the analyzer to:
•
HC Represents: Propane
•
λλλλ
calculated for: Gasoline
•
Warnings/Errors: NONE