Operating Instructions - Snap-on Equipment

PC Meters/GraphGas Bench MenuThe Gas Bench menu, top left on the Manual Meters screen, contains commandsthat control gas bench settings.Pump On—Turns the gas bench pump on or off. A check next to Pump Onindicates that the pump is on, no check indicates the pump is off.Zero—Activates the Gas Bench Zero process. Use this command if you want toverify that the analyzer reads properly when there is no gas present in the samplecell.✓ To perform an Auto Zero, the probe must be out of the tailpipe samplingfresh air.Fuel Type—Notifies the system what type of fuel the vehicle burns, which is usedto calculate the Dilution Correction Factor (DCF). The setting defaults to Gasolinebut you can select the appropriate vehicle fuel type. A check to the left of the fuelindicates the fuel type selected.GasolineMethanol / EthanolCompressed Natural GasLiquid Propane GasRefresh Rate—Contains settings for the Manual Meters display.Instantaneous (Default)— Displays readings as they happen5 Second Rolling Average— Calculates and displays an average every 5 seconds. (California ASMmandated averaging)Tachometer MenuThe Tachometer menu, top left on the Manual Meters screen, contains a singlecommand to set up the tachometer.The Setup command opens the Tachometer Configuration window.3C-3