Ultrasonic Level Transmitter Type 8160 for continuous, non-contact level measurement Level transmitter with PVDF transducer Advantages / Benefits Non-contact, continuous measurement with 4-20 mA and 10 amp relay output Measurement range from 15 - 750 centimeters All plastic construction with PVDF transducer and G 2 mounting threads Digital display indicates level in centimeter value Easy-Cal™ push button calibration for offset, span and relay set points Echo-Map™ signal return logic profiles the tank to disregard false echoes Fail-safe relay logic provides maximum process safety in the event of both power or signal loss Signal invert, relay latch and time delay Application Interface Level Measurement Outputs Controller Liquid or slurries in bulk storage, day tank or process vessels. The non-isolated, three-wire 4-20 mA output provides level measurement. Type 8620 continuous rail mount controller Enclosed Tank Environments The gas reference tube and special calibration mode will compensate for the ongoing changes in gas density found within enclosed tanks. The 10 amp, SPDT relay may be configured as an alarm or latched for automatic fill or empty operation. Fluid Control Systems Back to Data Sheets Ultrasonic Level Transmitter Type 8160 Principle of Operation An ultrasonic sound wave is pulsed eight times per second from the base of the transducer. As the sound wave moves downward into the vessel, it reflects against the process material and returns to the transducer. The microprocessor based electronics then measures the time between the signals generation and receipt, and relates this figure to the distance between the transmitter and the process material. Advanced signal processing techniques, including temperature compensation and Echo-Map™ tank logic ensure the integrity of echo signal returns. The ultrasonic level transmitter is used for continuous, Faceplate non-contact measurement of liquids and slurries. Easy-Cal™ PLC The transmitter faceplate features a digital display with Easy-Cal™ push button calibration for offset, span, relay, signal invert and time delay set points. Span (20 mA) Gas Reference Tube Easy-Cal (20 mA) Transmitter Type 8160 7.5 meter Valve Closed (R) Valve Open (R) Easy-Cal (4 mA) Offset (4 mA) The optional reference tube and special calibration mode are used to compensate for ongoing changes in gas density within enclosed tank environments. Easy-Cal™ push button calibration provides a fast and simple method to adjust the Echotouch™ measurement span and apply the relay set points. Ultrasonic Level Transmitter Type 8160 Derating Graphs Unacceptable Range 800 Sin 600 k ing 400 200 4.5 90 4.0 3.5 80 Temperature ( °C ) 1,200 1,000 Temperature / Voltage Derating Temperature / Pressure Derating Operating Pressure (bar) Maximum Resistance (Ohm) Electrical Loading Limits Unacceptable Range 3.0 2.5 2.0 1.5 1.0 Acceptable Range 0.5 Continuous 20 mA Sinking Current 70 60 50 40 Acceptable Range 30 20 10 0 12 36 24 Supply Voltage (VDC) -20 -10 0 12 10 20 30 40 50 60 70 80 90 Temperature ( °C ) Measurement Range 36 Beam Cone Radius Signal Strength vs. Range Graph Signal ( -dB ) 16 20 24 28 32 Supply Voltage ( VDC ) Depth vs. Radius 0 Maximum Range Formula Example -20 Optimal signal dB: -40 90 dB Derating factor dB: (-) 40 dB Maximum signal dB: (=) 50 dB 50 dB = Maximum range of 3.4 meters Depth (D) Example -60 -80 -90 -100 1 0 Range ( m ) 2 3 4 5 6 7 7.5 8 Maximum Range Formula Derating Factors With an optimal signal return strength of 90 decibels, the ultrasonic transmitter has a maximum measurement range of 7.5 meters. Although various application factors can reduce the overall signal return strength and shorten the total range of the transmitter. Such derating factors include: (1) significant air to liquid temperature differential; (2) beam cone interference such as fill streams, piping or mixers; and (3) liquid surface tension. To estimate the maximum range of the transmitter in your application, apply the maximum range formula ( 90 dB - the sum of the derating factor dB = maximum signal dB ) to the graph above. Refer to the maximum range formula example. Air / Liquid Temperature dB 00 - 15 degrees C.....................0 16 - 43 degrees C................5-10 44 - 60 degrees C..............10-20 Radius (R) (D) Centimeter (R) (D) 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 4.2 6.4 8.6 10.8 13.0 15.1 17.3 17.5 21.7 23.9 26.1 28.2 30.4 32.6 34.8 (R) Factor: Beam Cone Interference dB Outside beam cone...................0 Edge of beam cone..............5-10 Inside beam cone...............10-20 Factor: Liquid Surface Tension dB Calm surface.............................0 Agitated surface....................5-10 Wavy surface.....................10-20 Factor: Total derating factor dB: 400 425 450 475 500 525 550 575 600 625 650 675 700 725 750 37.0 39.2 41.4 43.6 45.7 48.0 50.1 52.3 54.5 56.7 58.9 61.1 63.2 65.4 67.6 Ultrasonic Level Transmitter Dimensions 7.5 meters ± 0.25% of full Span ± 3 mm 50 kHz 8 pulses per second 8 degrees conical 15 cm from transducer base Display type: Display units: Supply voltage: Current consumption: Current flow: Signal output: Signal invert: Offset adjustment: Span adjustment: Relay output: Switch voltage: Relay set point(s): Relay time delay: Four segment LED Centimeters or inches 14-36 VDC 200 mA maximum Sinking (Sourcing: optional) 4-20 mA, 12-36 VDC 4-20 mA or 20-4 mA Easy-Cal™ push button (4 mA) Easy-Cal™ push button (20 mA) 10 amp, SPDT (Form C) 240 VAC, 120 VDC (resistive) Easy-Cal™ push button (relay) Slow-2,5 minutes Fast-30 seconds LED for ON / OFF status 30 milliohms maximum Relay automatically inverts to the pre-determined NO / NC position Relay indication: Contact resistance: Fail-safe diagnostics: 116 mm 85mm 71mm 120 mm 85 mm Range: Accuracy: Resolution: Frequency: Pulse rate: Full beam width: Blocking distance: 205 mm -20 to 60 oC. Temperature range: Temp. compensation: Automatic over entire range 2 bar at 25 oC. Pressure rating: Transducer material: Enclosure material: Enclosure rating: Cable gland: Mounting threads: Gasket material: G2 (Optional: NPT) 35 mm Technical Data Type 8160 PVDF PP, flame retardent (U.L.94VO) IP65 (NEMA 4X) PG13 liquid tight gland G2 (Optional: NPT) Viton Optional Gas Reference Tube 56 mm Ordering Chart for Ultrasonic Level Transmitter Type 8160 Description Order-No. Transmitter Type 8160 417 387 Q with G2 mounting thread Ordering Chart for Accesories Description Order-No. Viton gasket 417 396 R Reference tube 417 407 M Side Mount Bracket 417 075 J In case of special application requirements, please consult for advice. We reserve the right to make technical changes without notice. 710GB/ 2-0061
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