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-2- <br /> Vapor Pressure Sensor Ambient Reference Test <br /> The following procedure shall be used at field sites to determine if the Vapor Pressure <br /> Sensor is reading properly in accordance with Veeder-Root ISD specifications. <br /> 1. Access the Vapor Pressure Sensor in the dispenser. Record which dispenser <br /> contains the pressure sensor and the pressure sensor serial number on the data <br /> form. <br /> 2. Remove the cap from the ambient reference port of the Vapor Pressure Sensor <br /> valve and open the valve to atmosphere by turning it 90 degrees so that the flow <br /> arrows point to both the Vapor Pressure Sensor sensing port and the ambient <br /> reference port (see Figure 4-1). <br /> 3. Start at the 'DIAL MODE' menu at the TLS Console front panel to enter the <br /> 'Calibrate SmartSensor' menu as shown in Figure 4-2 to view the non-calibrated <br /> pressure value. <br /> 4. Verify that the pressure value is between +0.2 and -0.2 inches water column <br /> (IWC). If the pressure value is not within this range, the pressure sensor is not in <br /> compliance with the pressure sensor requirements of Exhibit 2. <br /> 5. Replace the cap on the ambient reference port of the Vapor Pressure Sensor <br /> valve. Restore the Vapor Pressure Sensor valve by turning it 90 degrees so that <br /> the flow arrows point to both the Vapor Pressure Sensor sensing port and the <br /> UST vapor space sensing line (ref. Figure 4-1). <br /> 6. Press the <MODE> key to leave the 'Calibrate SmartSensor' menu. Note: Do not <br /> calibrate the sensor! <br /> Healy Phase 11 EVR System Including Veeder-Ro©t ISD, Exhibit 9—VR-202-D <br />