Operating Instructions - Snap-on Equipment

PC MaintenanceThe initial Gas Calibration window opens.Figure 3G-1: Initial Gas Calibration Screen✓ A warning displays and will automatically disappear followed by an autozero.2. The system then performs a zero calibration. In zero calibration, the gasanalyzer submits clean air, room air, into the sample system to verify thatthe analyzer reads properly when there is no gas present in the sample cell.✓ Make sure the vehicle exhaust sample probe is in fresh air, NOTsampling vehicle exhaust of any type.3. The Calibration Bottle Values screen then displays. Verify or change thevalues to match your calibration gas.— To change values, Tab to the value you want to change, press Deleteand input the correct value.Figure 3G-2: Calibration Bottle Values Screen4. Press OK. The Attach Calibration Bottle screen displays.Figure 3G-3: Attach Calibration Bottle Screen3G-2