22
SERVICE Brake Differential Pressure Test (continued):
7. On the rear of the trailer under test,
seal off the EMERGENCY air
connection using a “Gladhand
Shutoff with Chain” (PN 20053) or other approved tool.
8.
Perform these Power-up steps as needed:
►
If not already powered up, turn the Hub on by using its red button.
►
Supply 110 VAC to the Tester and turn on the Tester using the switch on the left side.
►
Connect the air source. Minimum pressure for the air source is 110 psi at 10 SCFM.
►
Wait about 30 seconds to allow the air tank inside the Tester to pressurize and stabilize.
►
At this time, the “Main 1200 Startup Screen” will be displayed. (See page 24 for a screen
shot.) Near the bottom of the left side of this view, there is an “Input” air pressure reading.
►
If needed, adjust the regulator on the left side of the 1200 Tester so the input pressure
displayed on the 1200 screen is between 100 and 105 psi. We recommend 102 psi.
►
The CERTIFIER 1200 Tester is now ready to perform this test.
9.
Verify or make the proper selections in the GUI
to be able to run the Differential Test. First, in
the “Trailer Information Panel” (the left side of the Certifier GUI) type in a VIN Number, which is a
required field. For “Configuration” do not pick “Self Calibration”, but instead, you need to select the
proper type of trailer/dolly under test. In the “Tests to Run”, check the boxes for Air Leak and
Differential. The other choices in the “Trailer Information Panel” are optional entry fields.
10.
Click on “Start”. The Air Leak test will start.
It will complete if there are no leaks. (A
successful Air Leak test must be done before a Differential test. If the Air Leak test fails, see step 5
in the “Performing the Internal Air Leak Self-test” on page 10 to help you debug that failure.)
11. After the Air Leak test passes, a popup will be displayed telling you to
connect the Diff Kit.
You’ve already done that a few steps ago, so just click on “Continue” in this popup.
12. If a sensor was not selected in an earlier test, the
“Setup Hub Sensors”
view will now be
shown. Select “Rear” for the correct sensor port. Then click on “Done” in the box below the list of
Sensors.
13.
The Differential test will now run.
At the completion of a passing test, another popup will be
shown notifying you to “Disconnect the Differential Kit”. But you don’t actually have to disconnect it
at this time. The popup just shows up at the end of the test.
14.
Now click on “Continue”
on this popup. You will be shown a “Certifier Report” view with the
results of the test that has been run: The Differential Test results are shown in the “DIFFERENTIAL
TEST” portion.
This is the end of the “Air Differential Test, using a Trailer or Dolly”.
Lite-Check CERTIFIER 1200 Operations Manual
