Operating Instructions - Snap-on Equipment

Pocket PCAutomatic Tests2DTSI TestThis section describes the Gas Emissions Tests, the primary function of theanalyzer.• TSI Test, page 2D-1• Idle Test, page 2D-6• Catalyst Test, page 2D-6• Meters, page 2D-11• Tachometer, page 2D-11The Two Speed Idle Test (TSI) provides standardized testing to assure thattechnicians run the test in a similar manner from vehicle to vehicle. The TSI Test inFGA is designed to run following user configured parameters.To begin the Two Speed Idle (TSI) Test,1. Tap the Automatic Tests button on the main screen.— The Automatic Tests menu opens.Figure 2D-1: Automatic Tests Menu Screen✓ Make sure the vehicle exhaust sample probe is NOT in the tail pipe untilafter auto zero is complete.DCF and HCF: DCF (Dilution Correction Factor) and HCF (HumidityCorrection Factor) buttons display at the bottom of the Automatic Tests andMeters/Graph menus. The buttons say DCF / HCF Off if the correctionfactor is turned off, DCF / HCF On if the correction factor is turned on. DCFand HCF settings change TSI results so be sure to set them as neededbefore beginning TSI. See Correction Factors, page 5-3.2D-1