Labkotec.fi - Measures for a better tomorrow
Instruction Manual for Labkotec Oy models including: SET-TSHS2 Capacitive Level Sensors Level Switch, SET-TSHS2, Capacitive Level Sensors Level Switch, Level Sensors Level Switch, Sensors Level Switch, Level Switch, Switch
SET/TSH2, SET/TSHS2 Sensor - Labkotec.fi
File Info : application/pdf, 7 Pages, 629.01KB
DocumentDocumentLabkotec Oy Myllyhaantie 6 FI-33960 PIRKKALA FINLAND Tel: +358 29 006 260 Fax: +358 29 006 1260 Internet: www.labkotec.fi 16.8.2021 D25232DE-3 1/7 SET/TSH2 and SET/TSHS2 Capacitive level sensors Installation and Operation Instructions Copyright © 2021 Labkotec Oy We reserve the right for changes without notice SET/TSH2 and SET/TSHS2 sensors Installation and Operation Instructions D25232DE-3 TABLE OF CONTENTS 1 GENERAL............................................................................................................ 3 2 CONNECTIONS AND INSTALLATION ............................................................... 4 3 ADJUSTING THE SWITCHING POINT .............................................................. 5 4 SERVICE AND REPAIR ...................................................................................... 6 5 TECHNICAL DATA .............................................................................................. 6 SYMBOLS Warning / Attention Pay special attention to installations at explosive atmospheres Fig. 1. SET/TSH2 and SET/TSHS2 dimensional drawings Copyright © 2021 Labkotec Oy 2/7 We reserve the right for changes without notice SET/TSH2 and SET/TSHS2 sensors Installation and Operation Instructions D25232DE-3 1 GENERAL SET/TSH2 and SET/TSHS2 are capacitive level detectors for liquids. V-versions are utilized with conductive liquids to indicate either low or high level, or for example oil/water interface in an oil separator. Oversions are convenient for use with non-conductive liquids, like oil, to indicate low or high level. SET/TSH2 is a generic sensor and it suits for most applications. SET/TSHS2 is basically the same sensor with a fork as a counterelectrode. It is meant for more challenging environments, e.g. grease, heavy oil or clogging liquids. The sensors are apparatus of equipment group II, category 1 G and can be installed in Zone 0/1/2 hazardous area. Fig. 2. Applications Copyright © 2021 Labkotec Oy 3/7 We reserve the right for changes without notice SET/TSH2 and SET/TSHS2 sensors Installation and Operation Instructions D25232DE-3 2 CONNECTIONS AND INSTALLATION The sensor is equipped with a shielded 3-wire cable. Wires 1 and 2 shall be connected to the corresponding connectors (1 = +, 2 = --) in the control unit. Wire 3 shall be connected to equipotential ground together with the shield of the cable. Please refer also to the Installation and Operating Instructions of the control unit. The sensor cable can be shortened or, when the control unit is located further away from the sensor, the cable can be extended with the junction box. The sensor causes an alarm when its sensing element is half-immersed in the measureable liquid. The sensor can be installed by hanging it on its cable from a tank ceiling or it can be fixed in its place with an installation pipe equipped with a ¾" inside thread. The fixed mounting prevents movement of the sensor when there is flow in the tank. When installing the sensor into an explosion hazardous area (0/1/2), the following standards need to be followed; IEC/EN 6007925 Electrical apparatus for potentially explosive atmospheres Intrinsically safe electrical system "i", IEC/EN 60079-14 Electrical apparatus for explosive gas atmospheres. Fig. 3. Connection example Copyright © 2021 Labkotec Oy 4/7 We reserve the right for changes without notice SET/TSH2 and SET/TSHS2 sensors Installation and Operation Instructions D25232DE-3 3 ADJUSTING THE SWITCHING POINT 1. Immerse the sensor into the liquid to be measured so that the sensing element of SET/TSH(S)2-O/V sensor is half-immersed in the liquid (the teflon coated rod acts as the sensing element) as in fig. 4. 2. Turn the sensitivity trimmer of the Labkotec SET control unit so that the alarm led just goes on. 3. Check the function by lifting and immersing the sensor couple of times into the liquid. Check also the Installation and Operating Instructions of the control unit in case of special instructions for the particular application. Fig. 4. Adjusting the switching point IF THE SENSOR DOES NOT WORK If the sensor is located in a hazardous area an Exi-classified multimeter must be used and the Ex-standards mentioned in chapter 5. SERVICE AND REPAIR must be followed. Make sure that the Fault-led, which reports malfunction, is not on. If the Fault-led is on, repair any breakdown or short circuit in the electric circuit. You can also check the function of the sensor by measuring its supply voltage (V) and current consumption (I) using a multimeter. Measure voltage between control unit connectors + and -. The voltage should be 10.5...12 VDC. Connect mA-gauge to the sensor circuit according to the figure below by disconnecting wire no. 1 from the control unit. Fig. 5. Measuring the sensor current Sensor current in different conditions: TSH2-O sensor clean and entirely air 5...6,5 mA sensor entirely immersed in oil 9,,,12,5 mA TSH2-V sensor clean and entirely air 5...6 mA sensor entirely immersed in water 10...12 mA TSHS2-O 5...6,5 mA 9...12,5 mA TSHS2-V 5...6 mA 10,5...12,5 mA Copyright © 2021 Labkotec Oy 5/7 We reserve the right for changes without notice SET/TSH2 and SET/TSHS2 sensors Installation and Operation Instructions D25232DE-3 4 SERVICE AND REPAIR The sensor must always be cleaned up and tested when emptying the tank or separator and when carrying out annual maintenance. For cleaning, a mild detergent (e.g. washing-up liquid) and scrubbing brush can be used. Service, inspection and repair of Ex-apparatus needs to be done according to standards EN IEC 60079-17 and EN IEC 60079-19. 5 TECHNICAL DATA SET/TSH(S)2 sensor Control unit Labkotec SET control units Cable Shielded oil-proof instrumentation cable 3 x 0.5 mm2 Ø 5,1mm. Standard length 5 m. Other lengths optional. Max. cable loop resistance 75 . Temperature Operational -25 C...+60 C Safety -25 C...+70 C Materials AISI 316, Teflon, NBR-concentrate EMC Emission EN IEC 61000-6-3 Immunity EN IEC 61000-6-2 IP-classification Sensor IP68 Junction box IP67 Ex-classification II 1 G Ex ia IIB T5 Ga ATEX VTT 03 ATEX 024X Special conditions (X) Ta = -25 C...+70 C The sensor cable can be extended with the junction box type LJB3-78-83 or LJB2-78-83. Ex-connection values Ui = 18 V I = 66 mA Pi = 297 mW Ci = 3 nF Li = 30 µH Operating principle Capacitive Manufacturing year: Please see the serial number on the type plate xxx x xxxxx xx YY x where YY = manufacturing year (e.g. 19 = 2019) Copyright © 2021 Labkotec Oy 6/7 We reserve the right for changes without notice