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Resumen del manual
OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, human applications. LV860 LEVEL SENSOR Please follow these installation, connection and adjustment instructions carefully. Failure to comply with these instructions or misuse of this equipment will void your warranty coverage. Equipment installation, connection and adjustment by qualified personnel only! LV860 LEVEL SENSOR NOTES: LV860 LEVEL SENSOR 1 - Description Level Sensor LV860 is designed to monitor liquids, granules and powder. It operates on the principle of electrical capacitance changes arising when an electrode surrounded by air is immersed in the medium. • Available either as a maximum or a minimum sensor. • LED status indication • Minimum switching Normally the sensor is immersed and the LED indicates. As the level drops below the sensor the LED extinguishes. • Maximum switching Normally the sensor is not immersed and the LED indicates. As the level rises above the sensor the LED extinguishes. • In the event of a short-circuit in the load circuit, the LED will extinguish. • The LV860 in PTFE housing is suitable for foodstuffs and can be widely used in the food processing industry. 1 LV860 LEVEL SENSOR 2 - Technical Data Medium temperature -20°C to +130°C -4°F to +266°F Short-time to +150°C +302°F Ambient temperature -20°C to +85°C -4°F to +185°F Pressure resistance: PTFE Teflon® fitting max. 2 bar (29.4 PSI) Polyamide 12 fitting max. 25 bar (367.5 PSI) Response delay approx. 1 s Degree of protection IP 65 (with mating connector) Input voltage DC 24 V ±25% -mark to demonstrate compliance with EC directive 89/336/EEC (EMC directive) LV860 LEVEL SENSOR 3 - Level Sensor Installation NOTE The Level Sensor may be installed in any attitude. 1. Ensure sufficient clearance space (see fig. 1 and 2) in the container wall. Installation STD (fig. 1): • The screw joint comprises a sleeve, a spring and a slotted nut. • The sleeve must be welded into the container wall. 2. Place the level sensor (without sealing compound) in the sleeve and tighten the spring and slotted nut. Installation G1A or 1" NPT (fig. 2): • Ensure a type G1A or 1" NPT thread in the container wall has been provided. 2. When tightening the level sensor please use the flats provided (SW32). CAUTION Do not overtighten. LV860 LEVEL SENSOR 4 - Connection CAUTION Check that the supply voltage corresponds with the voltage rating shown on the system. 1. Loosen the gland (PG9) (see fig. 1) and remove it together with clamping piece and bushing. 2. Unscrew the female plug. 3. Feed the supply cable through the gland (PG9), the clamping piece, the bushing and the female plug. 4. Connect the cable to the terminal block (see fig. 3). 5. Connect the supply voltage before adjusting the sensor. 6. Increase the level until the front side of the sensor probe is partly covered by the medium. LV860 LEVEL SENSOR 7. Minimum sensor • Turn the potentiometer screw clockwise until the LED extinguishes. Then slowly turn counterclockwise (+) until the LED indicates. Adjust the screw a further full turn clockwise (-) to compensate for any tolerance. 8. Maximum sensor • Turn the potentiometer screw clockwise until the LED indicates. Then slowly turn counterclockwise (+) until the LED extinguishes. Adjust the screw a further full turn counterclockwise (+) to compensate for any tolerance. 9. Replace and tighten the female plug. 10. Replace the clamping piece and bushing in the female plug. 11. Tighten the cable gland nut (PG9). The Level Sensor is now connected, adjusted and ready for operation. 5 - Operating Difficulties Problem: The level sensor fails to operate correctly. Solution: -Drop medium level below the sensor. -Remove the level sensor. -Clean the sensor probe carefully. Ў The level sensor may be steam-cleaned. LV860 LEVEL SENSOR NOTES: WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,...