SEKURE SX-3100LCD Manual do Operador descarregar pdf (Página 361)

GAS ANALYZER 349

LEAK TEST

The Leak Test is used to check the Gas Analyzer for leaks. Leaks cause incorrect readings,

usually indicating that the vehicle emissions are cleaner than they are. The Leak Test

should be run daily to ensure that emissions readings are not diluted. In addition, the Leak

Test should be run after changing gas filters and reattaching the sample hose or probe tip.

1. From the <MAINTENANCE> menu, press 5 to select Leak Test.

2. Place the probe tip cap on to the sample probe tip, then press e.

3. The Gas Analyzer turns the pumps on to draw a vacuum. After the pumps turn off, the

unit checks for pressure leaks for 20 seconds. If a leak is detected, “Leak Test Failed”

is displayed. Otherwise, the message “Leak Test Passed” is displayed.

Leak Test Failed

1. Disconnect the hose assembly from the Gas Analyzer. Rerun the Leak Test, blocking

the sample port instead of the probe tip. If the Leak Test passes, then the hose assembly

contains the leak and must be repaired or replaced.

2. If the Gas Analyzer fails the second Leak Test, check the following areas:

• The seal between the filter bowl halves.

• The hose connections on the filter bowl and drain filter.

• The red check valve on the drain hose.

• All threaded connections.

• Oxygen and NOx sensors.

3. Suggestion for finding the leak: Apply a small amount of isopropyl alcohol to the

suspect area while reading the HC under <DISPLAY DATA>. Move slowly from one

section to the next, since the analyzer may take five to six seconds to measure any

change. An increase in HC indicates a possible leak.

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SEKURE SX-3100LCD Manual do Operador Página 361