344-0442-101

Echotel® Models 344/345 Ultrasonic Non-Contact Transmitters for Level, Volume, or Open Channel Flow DESCRIPTION Echotel® Models 344 and 345 are full-featured, ultrasonic non-contact transmitters that provide continuous measurement for liquid level, volume, or open channel flow applications. These versatile transmitters utilize the latest in microprocessor-based electronics along with powerful non-contact ultrasonic transducers, to provide level measurement that is not affected by changes in specific gravity, viscosity, or conductivity. Model 344 and 345 are remote mounted transmitters that feature a front panel keypad, and a large 16-character alphanumeric display of all parameters. These transmitters are paired up with Kynar® and 316 stainless steel EchoMaster™ Ultrasonic Transducers that have extensive agency approvals for hazardous area locations. FEATURES • Front panel keypad for ease of programming – no need to open enclosure after wiring • 4–20 mA isolated (1,000 Ω load) and RS-232 outputs • Four 10 amp SPDT relays allow for simple alarm configurations to complex pump control including lead/lag alternation of pumps • Password code prevents unauthorized tampering of calibration parameters • 16-character alphanumeric display of all parameters. • Water and wastewater • Complete self-diagnostics assures unit is operating properly by checking all relays, outputs, and system functionality • Temperature compensation integral to all ultrasonic transducers • False target buffering eliminates signal interference from fixed obstructions in vessel • Slurries • Viscous fluids • Fuel oils • Acids • Caustics APPLICATIONS TECHNOLOGY Model 344 and 345 systems consists of three main components: an ultrasonic transducer, a transmitter, and an interconnecting cable package. The transducer contains a piezoelectric crystal that converts electrical signals generated by the transmitter into ultrasonic pulses. These pulses, or sound waves, are directed through the air toward the liquid surface. They are then reflected off the liquid surface as an echo, and returned to the transducer. The piezoelectric crystal then converts the returned echo into an electrical signal which is analyzed by the transmitter. The elapsed time between the generation of the ultrasonic pulse and the return echo is proportional to the distance between the face of the transducer and the liquid surface. The distance value is used by the transmitter to compute level, volume, or flow in the engineering units selected by the user. ECHOMASTER TRANSDUCER 50 kHz Model 385 transducer that is available in either Kynar or 316 stainless steel. The higher frequency 50 kHz transducer makes the 345 well suited for open channel flow, and shorter range applications. EchoMaster transducers are available in a wide variety of configurations to accommodate a broad range of industrial and municipal applications. The 344 uses the powerful 38 kHz Model 384 Kynar transducer, and is primarily used for level and volume applications. The 345 uses the Model 384 Model 385 Operating Frequency 38 kHz 50 kHz Material Kynar Kynar or 316 SS Insertion Lengths 3" & 10" 3", 6", & 10" NPT Process Connection 1" or 2" 3 ⁄4" or 2" Housing none, aluminum, or 316 stainless steel TYPICAL MOUNTING CONFIGURATIONS maximum level attainable. This dead band distance is 18 inches (460 mm) for the Model 384 transducer, and 12 inches (305 mm) for the Model 385 transducer. In Figure 1, the transducer is installed above the liquid surface, and the transmitter is mounted as far as 500 feet (152 meters) away. A minimum dead band distance must be allowed between the face of the transducer and the Transducer Dead Band Air Model 345 25 feet (7.6 m) maximum Range Model 344 35 feet (10.7 m) maximum Span Liquid Maximum Model 345: 24 feet (7.3 m) Model 344: 33.5 feet (10.2 m) Minimum Model 344: 18 inches (460 mm) Model 345: 12 inches (305 mm) Figure 1 Typical Transducer Mounting – Level/Volume 2 TYPICAL MOUNTING CONFIGURATIONS of the vessel. This helps to keep the 12 degree ultrasonic beam away from pumps, ladders, side walls, or other obstructions in the vessel. Figure 2 shows a typical transducer mounting on a bracket for open channel flow measurement. Figure 3 shows how the transducer can often be mounted further down in a wet well or sump if the liquid will never reach the top Electronics Transducer Flow Parshall Flume Figure 2 Typical Transducer Mounting – Open Channel Flow Figure 3 Typical Transducer Mounting – Wet Well or Sump ULTRASONIC BEAM ANGLE liquid surface. The chart below shows the distance the transducer should be located away from side walls and obstructions. The distances are based on a 6° beam radius at different heights above the liquid surface. Generally speaking, the transducer should be mounted one foot away for every 10 feet of height. A 12° conical beam of ultrasonic energy is emitted from the face of the transducer. The transducer should be mounted in a location such that the ultrasonic signal does not touch the side walls or any other obstructions in the vessel. This is typically accomplished by using a bracket, half-coupling, or rigid conduit to mount the transducer in a spot where a strong echo can be received off of the Distance from Transducer Face (feet) 3' 6' 9' 12' 15' 18' 21' 24' 27' 30' 33' 12° Beam Diameter (feet) 0.6' 1.3' 1.9' 2.5' 3.2' 3.8' 4.4' 5.0' 5.7' 6.3' 6.9' Minimum Distance from Wall or Obstruction (inches) 4" 8" 11" 15" 19" 23" 26" 30" 34" 38" 42" 3 FALSE TARGET DETECTION When it is impossible to mount the transducer far enough away from obstructions in the vessel a unique false target detection feature can be used. This target detection mode programs the transducer to search for, and display, the distance of the target nearest the transducer. When this false target is detected, the level information of this unwanted target is stored in the buffer for false targets. This process is repeated until all of the possible false target locations are programmed into the transmitter or the buffer is full. A maximum of nine false targets can be programmed into the buffer. Successful configuration of false targets will eliminate the possibility of unwanted target echoes being recognized as the real material level in the vessel. This technique is applicable to any obstruction which remains at the same horizontal plane (i.e., ladder rungs, pipes, tank braces, mixer blades, etc.) in the vessel. TRANSMITTER Supply voltage SPECIFICATIONS 120 VAC +10%/-15%, 50–60 Hz 240 VAC +10%/-15%, 50–60 Hz 24 VDC, ±20% Power consumption Fuse size Output signal Relays Fail-safe Display Keypad Enclosure material Response time Accuracy Humidity Ambient temperature without heater & thermostat* with heater & thermostat 12 watts (without heater) 1 ⁄4 amp replaceable, 250 VAC Slo-Blo® for AC units 2 amp replaceable, 250 VDC Slo-Blo for DC units 4–20 mA isolated (1,000 Ω load), RS-232 Four 10 amp resistive, SPDT User selectable for analog and relay outputs Sixteen (16) character alphanumeric LCD Sixteen (16) button integral to front panel High-impact polycarbonate 2 seconds typical ± 0.25% of calibrated span 95% Non-condensing -4° to +160° F (-20° to +70° C) -40° to +160° F (-40° to +70° C) * NOTE: The 31-day data logger has a +32° F (0° C) minimum when used without the heater and thermostat. 4 TRANSDUCER SPECIFICATIONS Model 384 Model 385 50 kHz 25 feet (7.6 meters) 24 feet (7.3 meters) 12 inches (305 mm) from -40° to + 140° F (-40° to +60° C) 18 inches (460 mm) from +140° to +200° F (+60° to +93° C) Transducer frequency Maximum range Maximum span Minimum dead band 38 kHz 35 feet (10.7 meters) 33.5 feet (10.2 meters) 18 inches (460 mm) from -40° to +163° F (-40° to +73° C) Operating temperature Operating pressure Temperature compensation Beam angle Cable length -40° to +163° F (-40° to +73° C) -40° to +200° F (-40° to +93° C) -10 to +50 psig (-0.69 to +3.45 bar) Automatic over the operating temperature range of the transducer 12° conical 500 feet (152 meters) maximum between transducer and transmitter AGENCY AGENCY APPROVALS APPROVAL CATEGORY APPROVAL CLASSES MODEL APPROVED FM 34X-X442-10X Non-hazardous Non-incendive NEMA 4X, IP65 Class I, II, III, Div. 2; Groups A, B, C, D, F, & G, T4A NEMA 4X, IP65 Class I, II, III, Div. 1; Groups B, C, D, E, F, & G, T6 NEMA 4X, IP65 Class I, II, III, Div. 1; Groups B, C, D, E, F, & G, T6 Class I, II, III, Div. 1; Groups A, B, C, D, E, F, & G, T6 Type 4X enclosure Class I, II, III, Div. 2; Groups A, B, C, D, E, F, & G, T4A Type 4X enclosure Class I, II, III, Div. 1; Groups B, C, D, E, F, & G Class I, II, III, Div. 1; Groups C, D, E, F, & G Type 4X enclosure Class I, II, III, Div. 1; Groups C, D, E, F, & G Class I, II, III, Div. 1; Groups A, B, C, D, E, F, & G Class I, II, III, Div. 2; Groups A, B, C, D, E, F, & G 384-XKXX-0XX Non-hazardous Explosion proof 385-XXXX-XXX 385-XEXX-006 385-XEXX-010 385-XEXX-003 CSA 34X-X442-10X 344-X442-10X 384-XKXX-0XX 384-XK0X-0XX 384-XK1X-0XX 384-XKYX-0XX 385-XXXX-XXX 385-XE1X-0XX 385-XEYX-0XX 385-XE0X-0XX 385-XX1X-XXX Non-hazardous Explosion proof Explosion proof Non-hazardous Non-incendive Non-hazardous Explosion proof Explosion proof Non-hazardous Explosion proof Explosion proof Non-incendive 5 MEASUREMENT RANGE CALCULATIONS Ultrasonic non-contact devices are typically rated for a maximum range in ideal conditions. Experience has shown that maximum range must be reduced for certain factors. Although the maximum range rating is somewhat conservative, each application must be evaluated for specific conditions in the tank. HOW TO CALCULATE Beam spread interference Sensor alignment Air movement To evaluate the performance of a 344 or 345 in a particular application, use the chart on page 7, and follow the steps below: 1. Select one condition from each of the operating parameters that best describes your application. 2. Enter the corresponding performance multiplier value in the application column. 3. Multiply all of the selected values together. 4. Multiply step 3 by the maximum potential range of the unit. This yields a value that is the maximum allowable measurement range for the application. Vapors Surface agitation Beam spread interference Dust Foam EXAMPLE The vessel is a closed-top tank, 26-feet tall and is filled from the top. Surface agitation Expect slight agitation from fill line: Performance multiplier 0.9 Vapor and steam The process temperature is +130° F, slight vapor is expected: Performance multiplier 0.9 Beam interference No interference exists: Performance multiplier 1.0 Transducer alignment The transducer will be perpendicular to the liquid surface: Foam Dust Air movement Ambient temperature Pressure Performance multiplier 1.0 None: Performance multiplier 1.0 None: Performance multiplier 1.0 None: Performance multiplier 1.0 0 to +120° F: Performance multiplier 1.0 Atmospheric pressure: Performance multiplier 1.0 Will the Model 344 work for this application? CALCULATION Multiply all values in the application column: 0.9 x 0.9 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 35 feet (maximum) = 28.35 feet The calculation yields 28.35 feet as the new maximum range. Since the tank is 26 feet tall, this application will give satisfactory results with the Model 344. NOTE: The performance multipliers provided are conservative estimates. Since these factors are subjective, the values have been designed to provide very high confidence of system success. Contact the factory if there are any questions concerning the interpretation of any of these performance multipliers. 6 MEASUREMENT Operating Parameter RANGE CALCULATIONS Condition Performance Application Multiplier 1.0 0.9 0.8 0.7 1.0 Smooth, glass-like surface SURFACE AGITATION: Surface agitation or waves can degrade the performance. Moderate agitation results in only slight degradation of performance. The worst case is when the surface is a good reflector, but in the wrong direction. (See also transducer alignment.) VAPORS AND STEAM: Vapors in the air space, above the process, become apparent, and cause problems when the liquid process temperature is well above the temperature of the airspace. The greater the difference, the more expected vapor problems. The problems result from condensation or layering in the sound path, both of which attenuate the sound signal, degrading performance. To avoid these problems, ensure that the vessel is insulated so that vapors are less likely to condense. If a vent is used, be sure that the vent, which is where condensation will form, is well away from the transducer. BEAM SPREAD INTERFERENCE: It is strongly recommended that nothing be allowed within the transducer’s beam, except the liquid which is being monitored. Often, the signal from the liquid will be strong, compared to the signal from other sources, such as ladder rungs, filling process material, support struts, etc. For that reason, some applications may provide satisfactory results, even with interference. Interference from agitator blades is only an intermittent interference that usually has little effect on performance. It is recommended there be no interference within the 6° half angle of the transducer beam. If interference is unavoidable, make the interference as far as possible from the transducer so that the real signal at the longest distance is stronger than the interference signal. Slight agitation, choppiness Heavy agitation Slight vortex (6°) No condensation Little condensation 0.9 Much condensation/ foggy appearance No interference Agitator at speed less than 60 RPM Agitator at speed greater than 60 RPM Interference outside 4°, far from transducer (in bottom third of range) Interference outside 4°, near to transducer (in top third of range) 0.8 1.0 1.0 Consult Factory 0.8 0.5 1.0 0.5 1.0 0.8 0.5 0.1 1.0 0.7 0.4 0.1 1.0 0.8 0.7 1.0 0.9 0.9 1.0 Consult Factory TRANSDUCER ALIGNMENT: Optimum performance is obtained when Beam perpendicular to liquid surface the transducer is perfectly aligned. If the process is not perpendicular to the sound beam, the sound will not reflect properly back to the Beam 4° off from perpendicular transducer. The effect is significant. FOAM: Even small thicknesses of foam can attenuate the ultrasound and render the system inoperative. If possible, moving the transducer to an area in the tank where there is less foam will improve the performance. Thick, heavy-density foams can sometimes produce a reflection from the top of the foam. The multipliers shown at right are general guidelines. For further assistance consult the factory. DUST: Dust attenuates the sound and results in poor performance. Even barely perceptible haze in the air can cause significant attenuation. AIR MOVEMENT: The movement of air, as possible in an open top vessel, can create a layer from which the sound will reflect. This will be most noticeable in applications where vapors or steam tend to form. AMBIENT TEMPERATURE: The ambient temperature can have a significant effect on the sound and on the transducer’s capability to transmit and receive sound. The most noticeable effect on the transducer is at the temperature extremes. PRESSURE: Sound requires air molecules to be able to travel. Sound will not travel in a vacuum. Likewise, higher pressures will allow the sound to continue without decay, which can cause problems with multiple echoes. No foam Light froth, less than 0.25" thick Light foam, less than 0.5" thick Light foam, more than 1" thick No dust Haze, barely perceptible Slight dust Heavy dust No air movement Open vessel, but transducer below rim Open air movement in sound path -20° to +140° F (-29° to +50° C) -40° to -20° F (-40° to -29° C) +140° to +160° F (+50 to +70° C) -10 to +50 PSIG (0.689 to +3.45 bar) Pressures outside above rating Multiply all values together in the application column Multiply by maximum potential range (35 feet for Model 344 or 25 feet for Model 345 ) Maximum allowable measurement range for this application X = 7 DIMENSIONAL INCHES MODEL (MM) & 345 SPECIFICATIONS 344 TRANSMITTERS 9.50 (241) 6.75 (171) 9.50 (241) 13.00 (330) 6.00 (152) Front View Side View MODEL 385 TRANSDUCERS 4.63 (118) Dia. 3.00 (76) 2.75 (70) 4.00 3/4" NPT (102) 3/4" NPT 3/4" NPT 3/4" NPT 6.00 (152) or 10.00 (254) depending upon model 2" NPT 2" NPT Optional Mounting Flange 3.00 (76), 6.00 (152) or 10.00 (254) depending upon model 3.00 (76) 3.00 (76), 6.00 (152) or 10.00 (254) depending upon model 1.90 (48) 1.90 (48) 3 1.90 (48) 1.90 (48) 2" NPT Transducer with Housing ⁄4" and 2" NPT Transducer without Housing 8 DIMENSIONAL INCHES MODEL (MM) SPECIFICATIONS 384 TRANSDUCERS 1" NPT Process Connection 3/4" NPT 4.63 (118) Dia. 3.00 (76) 2.75 (70) 2" NPT Process Connection 4.50 (114) 3.00" (76) Insertion Length 2.12 (54) Insertion Dia. 2" NPT Process Connection 1" NPT Process Connection 3.00" (76) Insertion Length 10.00" (254) Insertion Length 1" NPT Transducer without Housing 10.00" (254) Insertion Length 2" NPT Process Connection 2.12 (54) Insertion Dia. 2" NPT Transducer with Housing 2" NPT Process Connection 3.00" (76) Insertion Length 10.00" (254) Insertion Length 2" NPT Transducer without Housing OPTIONAL MOUNTING BRACKETS 3/4" Male NPT (P/N 36-3813-002) 2" Female NPT (P/N 36-3813-001) 3.00 (76) 29.00 (736) 3/4" Male NPT (P/N 36-3812-002) 3.12 (79) 2.00 (50) 2" Female NPT (P/N 36-3812-001) 1.50 (38) 2.00 (50) 3.12 (79) 6.12 (155) 20.50 (520) 22.50 (571) 1.50 (38) 20.50 (520) 22.50 (571) 3.00 (76) Floor Mount Bracket Wall Mount Bracket 9 TRANSMITTER MODEL NUMBER Models available for quick shipment, usually within one week after factory receipt of a complete purchase order, through the Expedite Ship Plan (ESP) BASIC MODEL 344 345 Ultrasonic non-contact transmitter, used with Model 384 transducer Ultrasonic non-contact transmitter, used with Model 385 transducer INPUT POWER 0 1 2 3 4 120 240 24 120 240 VAC, 50/60 Hz VAC, 50/60 Hz VDC VAC with heater and thermostat VAC with heater and thermostat SPECIAL OPTIONS 0 1 2 3 None Mechanical totalizer 31-day data logger Mechanical totalizer & 31-day data logger 4 4 2 1 0 MODEL MODEL 384 38 KHZ TRANSDUCER NUMBER PROCESS CONNECTION 2 5 1" NPT, not available with transducer housing code 1 or Y 2" NPT TRANSDUCER MATERIAL K Kynar TRANSDUCER HOUSING 0 1 Y No housing, 35' (10.7 m) of cable potted into transducer Cast aluminum, NEMA 4X/7/9 housing with 3⁄4" NPT single conduit, connecting cable ordered separately 316 stainless steel, NEMA 4X/7/9 housing with 3⁄4" NPT single conduit connecting cable ordered separately TRANSDUCER MOUNTING BRACKET 0 3 4 No mounting bracket Wall mount bracket for 2" NPT process connection only Floor mount bracket for 2" NPT process connection only TRANSDUCER INSERTION LENGTH 003 010 3" (76 mm) length 10" (254 mm) length 3 10 8 4 K MODEL MODEL 385 50 kHz TRANSDUCER NUMBER PROCESS CONNECTION 1 5 3 ⁄4" NPT, not available with transducer housing code 1 or Y 2" NPT TRANSDUCER MATERIAL K E Kynar 316 stainless steel (for use in hazardous environments, refer to agency approvals) TRANSDUCER HOUSING 0 1 Y No housing, 35' (10.7 m) of cable potted into transducer Cast aluminum, NEMA 4X/7/9 housing with 3⁄4" NPT single conduit, connecting cable ordered separately 316 stainless steel, NEMA 4X/7/9 housing with 3⁄4" NPT single conduit connecting cable ordered separately TRANSDUCER MOUNTING BRACKET 0 1 2 3 4 No mounting bracket Wall mount bracket for 3⁄4" NPT process connection only Floor mount bracket for 3⁄4" NPT process connection only Wall mount bracket for 2" NPT process connection only Floor mount bracket for 2" NPT process connection only TRANSDUCER INSERTION LENGTH 003 006 010 3" (76 mm) length 6" (152 mm) length 10" (254 mm) length 3 8 5 CONNECTING PART NUMBER CABLE CABLE LENGTH IN FEET 10 feet (3 m) minimum, 500 feet (152 m) maximum length Example: 12 foot cable length = Code 012 0 3 7 3 1 7 6 11 QUALITY The quality assurance system in place at Magnetrol® guarantees the highest level of quality throughout the company. MAGNETROL is committed to providing full customer satisfaction both in quality products and quality service. The MAGNETROL quality assurance system is registered to ISO 9001 affirming its commitment to known international quality standards providing the strongest assurance of product/service quality available. ESP Expedite Ship Plan Several ECHOTEL Model 344 and 345 Ultrasonic Transmitters are available for quick shipment, usually within one week after factory receipt of a complete purchase order, through the Expedite Ship Plan (ESP). Models covered by ESP service are color coded in the model selection charts. To take advantage of ESP, simply match the color coded model number codes (standard dimensions apply). ESP service may not apply to orders of ten units or more. Contact your local representative for lead times on larger volume orders, as well as other products and options. WARRANTY All MAGNETROL electronic level and flow controls are warranted free of defects in materials or workmanship for one full year from the date of original factory shipment. If returned within the warranty period; and, upon factory inspection of the control, the cause of the claim is determined to be covered under the warranty; then, MAGNETROL will repair or replace the control at no cost to the purchaser (or owner) other than transportation. MAGNETROL shall not be liable for misapplication, labor claims, direct or consequential damage or expense arising from the installation or use of equipment. There are no other warranties expressed or implied, except special written warranties covering some MAGNETROL products. For additional information, see Instruction Manual 51-629. 5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com 145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306 Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93 Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317 Copyright © 2011 MAGNETROL INTERNATIONAL, INCORPORATED. All rights reserved. Printed in the USA. Performance specifications are effective with date of issue and are subject to change without notice. MAGNETROL, MAGNETROL logotype and ECHOTEL are registered trademarks of MAGNETROL INTERNATIONAL, INCORPORATED. BULLETIN: 51-129.6 EFFECTIVE: May 2004 SUPERSEDES: November 2002