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Site Preparation and Inst: tion Instructions <br /> TLS-350 UST Monitoring System <br /> Sensor Installation—Fiberglass Tank").Firstmeasure NOTE:Pull-Cord InstallationMethod.Toensure <br /> the sensor riser pipe from the bottom of the pipe to the 0 proper installation of the sensor using a pull cord, <br /> top.Subtract one foot from the riser pipe measurement, the reference marking 4 feet up the sensor should <br /> then measure that distance up the leader cable from its face toward the pull cord. An eyelet has been pro- <br /> c8nnection to the sensor;mark the leader cable. vided at the end of the sensor for pull-cord installa- <br /> TI <br /> CAUON: DO NOT USE A KNIFE OR OTHER tion(see Figure 46). <br /> SHARP OBJECT TO MARKTHE LEADER CABLE. 3. Before continuing,verify correct switch positioning by <br /> MARK THE DISTANCE WITH A MARKER,TAPE, connecting an ohm meter to the two-wire cable of the <br /> OR A TWIST TIE. interstitial sensor.The ohm meter should indicate Oft <br /> NOTE: To ensure proper operation of the float (continuity)at this point.If the meter reads 100kQ,the <br /> float switch is in the wrong position and must be <br /> switch,it is important that you order and install the reinstalled correctly. <br /> correctly sized sensor in your fiberglass tank This <br /> ensures the float switch will rest as close as possible 4. If the switch indicates Oft,continue to feed the switch <br /> to the bottom of the tank annulus (see Figure 47, into the annular space, until the switch reaches the <br /> "Sensor Switch Position at Bottom of Tank Annu- bottom of the tank(the splice between the sensor and <br /> lus"). leader cable shoul d be 1 foot from the bottom ofthe riser <br /> 2. Feed the sensor into the riser pipe until the sensor pile). <br /> reaches the top cavity of the tank and rests at the 5. Verify the switch is in the correct position by connect- <br /> beginningofthe annulus(see Figure 46,"Sensor Switch ing the ohm meter to the two-wire cable. The ohm <br /> Position at Top of Tank Annulus"). meter will indicate 100kQ if the sensor is properly <br /> NOTE:The sensor's float is designed with a bend to installed. <br /> control direction of installation in your tank annu- 6. Secure the riser cap to the riser pipe. <br /> lus.Red dots are painted on the top of the switch and 7 Tighten the cord grips on the riser cap and junction box <br /> 4 feet up the sensor, as position references during to ensure a water-tight seal at the cable entry. <br /> installation.When installing the sensor,the switch <br /> will first appear to be upside-down, with the dot <br /> facing the bottom (see Figure 46). The switch will <br /> rest right-side-up at the bottom of the tank (see <br /> Figure 47), "Sensor Switch Position at Bottom of POSITION <br /> Tank Annulus"), with the reference dots facing in REFERENCE <br /> toward the tank. DOT(RED) <br /> a FEET FROM <br /> SENSOR SWITCH <br /> MUM Din <br /> MnNnOiE <br /> 7 COR.GRIR SEnES <br /> SURREIEO W iTN SENSOR <br /> N PULL <br /> — _ CORD <br /> .u..l� ' wEn'RERRROOi <br /> UNCTION BO^wiT, <br /> t.NC.NR*TICE <br /> E CII—INC. <br /> EPO,USE4 PULL-CORD <br /> El <br /> NER1 EYELET <br /> TO PROBE <br /> jUNCTION BO• <br /> C Ea S <br /> C4BLE <br /> —+..n­ER POSITION <br /> REFERENCE <br /> DOT(RED) <br /> Figure 46.Sensor Switch Position at Top of Tank Annulus. <br /> Z,EN,oR POSITION <br /> B E^1- REFERENCE <br /> DOT(REO) <br /> EIBERGE�SE TE.NN Ift <br /> ssET PULL-CORD <br /> U,I^N^ EYELET <br /> Figure 45. Float-Switch Type Interstitial Sensor Figure 47.Sensor Switch Position at Bottom of Tank <br /> Installation–Fiberglass Tanks. Annulus <br /> 30 <br />