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Greyline LIT25 Level Indicating Transmitter

Greyline

Product Code: LIT25
Brand: Greyline



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Description for Greyline LIT25 Level Indicating Transmitter

Low CostIsolated 4-20mA Output (1000 ohm)Large LCD DisplayProgrammable Signal RelayNon-Contacting Ultrasonic Sensor or Optional Pressure SensorBuilt-in 2-Key CalibratorWatertight, Dust tight EnclosureThis new Greyline Transmitter displays, controls and transmits level. Mount the non-contacting ultrasonic sensor at the top of your tank and the compact, watertight electronics/display enclosure at a convenient location nearby. Operators can calibrate the LIT25 with its 2-button Keypad, without climbing the tank. Use the built-in relay for level control or alarm, the large 4-digit display for local indication, and the isolated 4-20mA output to transmit level to a PLC.The standard ultrasonic Sensor measures liquid levels up to 32 ft. (10 m), and includes automatic temperature compensation. Choose the optional all-Teflon sensor for chemical compatibility, or one rated to 50 ft (15.6 m) range. All ultrasonic sensors are available with optional intrinsic safety for installation in hazardous rated locations. The LIT25 can also be ordered with gauge-type pressure sensors for special applications.Contact Greyline Instruments for specific recommendations in your application.LEVEL INDICATING TRANSMITTER SPECIFICATIONSSCOPE: This specification covers a non-contacting, ultrasonic Level Indicating Transmitter as manufactured by Greyline Instruments Inc., Largo, Florida / Long Sault, Ontario. The instrument shall provide for indicating, transmitting and control of the material level in a vessel, or proximity of a target to the Instrument Sensor.A. PERFORMANCE SPECIFICATIONSTo consist of a non-contacting ultrasonic sensor, connecting cable, and a remote enclosure with indicating, transmitting and controlling electronics.Measurement accuracy shall be ±0.25% of Range or 2 mm (0.08"), whichever is greater, and shall be automatically temperature compensated.Sensor cable shall be RG62AU coaxial with total length as required for installation, not to exceed 500 ft (152 m).System shall have no moving parts and shall not contact the material being measured.B. NON-CONTACTING SENSORSensor shall be constructed of PVC and Teflon.The sensor shall have a minimum deadband or blanking of 12" (305mm) and a maximum range of 32 ft (10 m), and have an operating frequency of 42 kHz with an ultrasonic beam angle of 8ø.Sensor shall withstand accidental submersion to 20 psi.Sensor operating temperature shall be from -40°F to 150°F (-40°C to 65°C).Sensor shall include integral temperature sensor. Temperature sensors requiring separate mounting and wire runs shall not be accepted.C. SENSOR CONNECTING CABLEProvide RG62AU coaxial cable 25 ft (7.6 m) continuous length, with waterproof, potted bond to the Sensor head.Extended sensor cable shall be RG62AU coaxial to a maximum of 500 ft (152 m). Cable shall be spliced with screw terminal connections in manufacturer's recommended steel NEMA4 Junction Box.Level and temperature signals shall be conducted on one single coaxial cable. Separate or multiple-conductor cables shall not be accepted.Sensor cable shall be installed in grounded metal conduit.D. INDICATING TRANSMITTERThe Indicating Transmitter shall be housed in a wall-mount, watertight NEMA4X (IP66) enclosure with clear, polycarbonate cover. Mounting hardware shall be included. Combined Transmitter/Sensor systems requiring mounting at the top of a tank shall not be accepted.Transmitter shall include a large 4-digit LCD display with 3/4" (19 mm) high digits that shall be visible without opening the enclosure cover.The transmitter shall provide for field-calibration via built-in 2-key calibration system. Systems requiring calibration by BCD switches or external calibrators shall not be accepted.Calibration data shall be permanently stored through power interruptions without requirement of a back-up battery.Field calibration shall allow keypad selection of measurement span, Range or Level operating modes, and display units in Percent, Inches or Centimeters.Transmitter shall permit field programmable damping to smooth output in turbulent level conditions, and programmable rejection time to disregard false signals from agitators, waves and spurious echoes.Transmitter operating temperature shall be from -13°F to 122°F (-25°C to 50°C).Transmitter shall have an isolated 4-20mA output into a 1000 ohm maximum load. Output shall allow field programmable offsets of 4mA and 20mA.Provide one signal relay contact rated 1 amp. Relay shall be programmable for single set point alarm, pump control, and/or echo loss alarm.Transmitter electronics shall be surge protected on AC power input, sensor and 4-20 mA output.Transmitter power input shall be 120VAC 50/60Hz with power consumption of 5 Watts or less.E. ADDITIONAL FEATURES FOR INSERTION IN SPECIFICATION AS REQUIRED:Transmitter power input shall be 200-250VAC 50/60Hz with maximum power consumption of 5 watts or less.Transmitter power input shall be 24VDC with maximum power consumption of 5 watts or less.Have an all-PVC ultrasonic sensor model PZ34 rated for 32 ft (10 m) maximum range and designed for pump station applications.Have an all-Teflon sensor model PZ32TE rated for 32 ft (10 m) maximum range and operation from -40°F to 170°F (-40°C to 76°C).Have a PVC and Teflon sensor model PZ56 rated for measurement range on liquids up to 50 ft (15.6 m).Have a Teflon-faced flange mount sensor model PZ34TxF rated for 32 ft (10 m) measurement range. Specify flange size of 4” or 6”.Include manufacturer's recommended sensor cable Junction Box for extended cable lengths.Sensor, connecting cable and junction boxes shall be rated intrinsically safe to Class I,II,III, Div. I,II, Groups C,D,E,F,G.

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