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MicroSensor Installation Guide Sensor Installation-Steel Tank <br /> Sensor Installation - Steel Tank <br /> 1. Make sure no liquid is present in the annular space. <br /> 2. To be sure the sensor will reach the bottom of the annular space,first measure the sensor riser pipe from the <br /> bottom of the pipe to the top. (See Distance to Measure in Figure 5.) Then measure the same distance up the <br /> sensor leader cable from its connection to the sensing element and mark the leader cable. Do not use a knife <br /> or other sharp object to mark the leader cable to avoid damaging wire. Use instead,a marker, piece of tape, or <br /> a twist tie. <br /> 3. Install a cord grip into the junction box. <br /> 1/2"to x"reducer Weatherproof junction box with <br /> (x=riser diameter) 1/2-inch N.P.T.threads(16 Cubic <br /> inch volume minimum) <br /> 14"min.dia.manhole, <br /> Cord grips <br /> "v <br /> P y <br /> — Seal-off <br /> 1/2"rigid conduit(to Console) <br /> Minimum riser <br /> Distance to ✓' diameter 1 inch <br /> measure <br /> Sensor cable <br /> Steel tank <br /> Sensor must rest <br /> on bottom of tank <br /> Figure 5. Sensor Dimensions and Installation-Steel Tanks <br /> 4. Lower the sensor assembly into the riser pipe until the sensor is just resting on the bottom of the tank. <br /> 5. Run the sensor leader cable through the reducer up to the mark previously made on the cable. <br /> 6. Secure the reducer to the riser pipe. <br /> 7. Keeping the cable taut,secure the sensor assembly in place by attaching the cord grip. <br /> 8. Tighten the cable bushing nuts on the riser cap and junction box to ensure a watertight seal at the cable entry. <br /> 9. Using wire nuts, connect the two-wire sensor cable to the field wires in the sensor junction box. Be sure to <br /> observe color codes for proper polarity hookup to the TLS Console (as shown in Figure 3 on page 5). <br /> 10. Seal wire nuts with epoxy sealant using one bag for two wire nut connections as discussed in Step 5 of the <br /> Containment Riser installation above . <br /> 6 <br />