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Tester Hookup:
1. Connect the LeakMaster NE240 Red power
cable to a 12-Volt DC power supply. If you are
using a battery, be sure it is in good condition
and fully charged!
2. Connect the LeakMaster NE240 Black ground
cable to the vehicle's chassis ground.
NOT connect to battery ground! A spark in the
vicinity of the battery can cause an explosion!
Check to see that the LeakMaster NE240
'Power Indicator' lamp is on, indicating good
battery contact.
3. Connect either Nitrogen or shop air supply line
to the LeakMaster NE240 water-separator
located on the back of the machine. Be sure
supply pressure is between 50 psi and 125
psi.
Prior to performing EVAP tests:
When the vehicle's engine is turned off, the OBD-II EVAP System is generally venting in one form
or another. Use a scanner and 'close' the EVAP System in order to perform any leak tests.
Remember that all tests with the LeakMaster NE240 are performed with the engine off!
It is best to perform all testing in calm air, so that the smoke exiting the leak will not be blown away
impairing your view of the leak.
Because of the EVAP System's volatile fumes, we always recommend you connect the
LeakMaster NE240 to an inert gas such as Nitrogen to create the smoke when testing the
Evaporative System, in order to prevent creating a flammable fuel mixture inside the fuel tank.
However, the LeakMaster NE240 can also be used to perform its functions with conventional shop-
air, if being used to test systems other than the EVAP System.
DO
8
Black to
Ground
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