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Veeder-Root Sensor Application Guide <br />Appendix B <br />3. Determining The Top (Warning) Float Position <br />Consult the tank chart to determine the height of the top warning level (centerline of the top float). Measure the <br />distance from the top of the tank to the centerline of the top float (Fig.B-3). Note this measurement as D3. <br />4. Determining Correct Sensor To Order <br />Use the D1, D2 and D3 measurements made in Steps 1 - 3 to determine the part number of the sensor from <br />the V -R Oil/Water Separator Sensor matrix shown in Fig.B-4. <br />For example: D1 = 33", D2 = 24.5, D3 = 13" <br />D2 + D3 = Top float position, i.e., 24.5 + 13 = 37.5" (Dimension A in the V -R P/N matrix) <br />D1 - D3 = Bottom float position, i.e., 33 - 13 = 20" (Dimension B in the V -R P/N matrix) <br />Using the OWSS float positions calculated in the example above, the top float (Warning) would activate at 13 <br />inches below the top of the tank and the bottom float (Alarm) would activate at 33" below the top of the tank. <br />The correct part number for these example float positions would be 764690-053. <br />Round dimension A or B down to the nearest available option if necessary. Note: doing so will impact the float <br />Warnings and Alarms generated on the TLS system. <br />Alarm Conditions <br />Alarm Type <br />Alarm Condition <br />Liquid Warning <br />Oil present in tank <br />Liquid Alarm <br />Oil has reached its maximum volume, remove from tank <br />Sensor Out Alarm <br />No communication to ATG <br />Normal <br />Tank is properly setup with liquid <br />M <br />