Operating Instructions - Snap-on Equipment

3CPC Meters/Strip ChartThis chapter describes the PC manual meters and strip chart process, results anddisplay setup. It also describes how to toggle the analyzer pump on/off and set upthe tachometer.• Manual Meters/Strip Chart, page 3C-1• Pump, page 3C-10• Tachometer, page 3C-11Manual Meters/Strip ChartViewing the Manual Meters or Strip Chart display can assist you to diagnoseproblems and properly tune a vehicle. Manual Meters and Strip Chart providedifferent views of the same information. The meters provide a digital readout ofavailable emissions signals including HC, CO 2 %, CO%, O 2 %, NO x , Lambda andothers. The strip chart provides a general trend of the emissions measurements ina wave form display. In both displays, you can freeze a snapshot of the signals orrecord a progression of signal measurements over a time span.Manual MetersTo view the Manual Meters or Strip Chart display,Press the Gas button and choose Manual Meters or Strip Chart from the menu.orSelect the 1 Manual Meters command.✓ You can also toggle between Manual Meters and Strip Chart using theTest Actions menu.The system then performs a zero check.For more information about the zero check, see Gas Bench Zero, page 3D-2.After the zero check has passed, the Manual Meters screen displays. The ManualMeters screen provides an active view of the changing emissions readings.3C-1