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echotel ? model 300/301 ultrasonic non-contact t ransmitter for level, v olume, and open channel flow description the model 300/301 is a full-featured, powerful ultra- sonic system for measurement of liquid level, volume, or open channel flow. available as an integral or remote mounted transmitter, this extremely versatile system is simple to install and calibrate. the non- contact design means that it is not affected by changes in specific gravity, viscosity, or conductivity. features isolated 4?0 ma output includes an active/passive mode for loop power or device power. rs-485 with modbus protocol allows bi-directional communication with dcs or plc. tw o or four 10 amp spdt gold flash relays provide flexibility for most alarm and control schemes. 16-button keypad and two-line, 16-character lcd alphanumeric display. t emperature compensation integral to ultrasonic transducer. output in units of level, volume, or open channel flow. most common flumes and weirs preprogrammed in memory in addition to the manning formula and a custom table using either a linear or spline curve. complete self-diagnostics checks all relays, outputs, and system functionality. class i, div. 1, groups b, c, and d on both the transmitter and transducer. quickcal mode allows complete system calibration in 90 seconds. powerful 38 khz echomaster ultrasonic transducer performs in difficult applications. password protection prevents unwanted tampering with configuration data. applications w ater and wastewater slurries v iscous fluids acids oils caustics
the model 300/301 is a versatile system that utilizes non- contact ultrasonic technology to measure liquid levels in a variety of applications. the system consists of a trans- mitter and an ultrasonic transducer. the transducer con- tains a piezoelectric crystal that has the ability to convert electrical signals generated by the transmitter into ultra- sonic pulses. the unit operates by directing ultrasonic pulses, or sound waves, 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. technology 2 typical mounting configurations the transducer is installed above the liquid surface. a minimum dead zone distance of 18" (457 mm) must be allowed between the face of the transducer and the maxi- mum attainable level. figure 1 shows a typical open channel flow installation with the transducer mounted on a bracket. figure 2 shows how the unit can be mounted in a coupling or flange for level or volume applications. model 300 flow parshall flume model 300 air liquid dead zone 18" minimum (457 mm) flange maximum range 30.0' (9.1 m) maximum span 28.5' (8.7 m) figure 1 t ypical mounting ? open channel flow figure 2 t ypical mounting ? level/volume
3 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 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. distance from 12 beam minimum distance from t ransducer face (feet) diameter (feet) wall or obstruction (inches) 3' 0.6' 4" 6' 1.3' 8" 9' 1.9' 11" 12' 2.5' 15" 15' 3.2' 19" 18' 3.8' 23" 21' 4.4' 26" 24' 5.0' 30" 27' 5.7' 34" 30' 6.3' 38" 33' 6.9' 42" ultrasonic beam angle typical mounting configurations 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 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 3 t ypical transducer mounting - wet well or sump
4 fm 300-rxxx-45x indoors & outdoors nema type 4x & ip 65 301-rxxx-400 with 384-xkxx-0xx hazardous locations class i , div. 1; groups b, c & d class ii , div. 1; groups e, f & g class iii csa 300-rxxx-45x non-hazardous type 4x enclosure 301-rxxx-400 with 384-xkxx-0xx 300-rxxx-45x hazardous locations class i , div. 1; groups b, c & d 301-rxxx-400 with class ii , div. 1; groups e, f & g 384-xk0x-0xx class iii 384-xk1x-0xx hazardous locations class i , div. 1; groups c & d and class ii , div. 1; groups e, f & g 384-xkyx-0xx class iii agency model protection method area classification agency approvals these units have been tested to en 50081-2 and en 50082-2 and are in compliance with the emc directive 89/336/eec. 3.87 (98) rotation clearance 2" npt process connection 3.00 (76) or 10.00 (254) insertion length 5.93 (151) 1" npt (plugged) 12.25 (311) 1" npt 8.46 (215) 2.12 (54) insertion diameter 2 holes .38 (10) dia. 3.00 (76) 2.00 (51) 2.37 (60) 3.50 (89) 3.87 (98) rotation clearance 3.75 (95) 5.93 (151) 10.68 (271) 1" npt 1" npt 8.46 (215) 3/4" npt plug model 301 remote mount with bracket model 300 integral mount dimensional specifications inches (mm)
dimensional specifications inches (mm) 2" npt process connection 3.00" (76) insertion length 4.63 (118) dia. 3.00 (76) 2.75 (70) 4.50 (114) 2.12 (54) insertion dia. 2" npt process connection 3/4" npt 10.00" (254) insertion length 2.12 (54) insertion dia. 3.00 (76) 29.00 (736) 1.50 (38) 3.12 (79) 6.12 (155) 20.50 (520) 22.50 (571) 2.00 (50) 2" female npt (p/n 36-3813-001) 20.50 (520) 22.50 (571) 3.00 (76) 1.50 (38) 2.00 (50) 3.12 (79) 2" female npt (p/n 36-3812-001) floor mount bracket wall mount bracket optional mounting brackets model 384 transducers npt pe cnnetin 300 () inetin lenth npt pe cnnetin 1000 (4) inetin lenth 1 npt pe cnnetin 300 () inetin lenth 1 npt pe cnnetin 1000 (4) inetin lenth 1 (4) inetin dia 1 (4) inetin dia 1 (4) inetin dia 1 (4) inetin dia npt tande ith hin 1 npt tande itht hin npt tande itht hin 5
measurement range expectations ultrasonic non-contact devices are typically rated for a maximum range in ideal conditions. experience has shown that maximum range must be adjusted for cer- tain factors. although the maximum range rating is somewhat conservative, each application must be evaluated for specific conditions. the operating parameters listed below can impact the maximum range of measurement: ?surface agitation ? v apors and steam (as measured by temperature difference between liquid and air) ?beam spread interference ?sensor alignment ?foam ?dust ?air movement ?ambient temperature ?pressure how to calculate to estimate how successful a particular application may be, using the chart on page 3: 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 values together. 4. obtain the maximum range from the table below that corresponds to your switch or transmitter model. 5. multiply step 3 by step 4; this yields a value that is the maximum allowable measurement range for this application. example: the vessel is a closed-top tank, uninsulated, 22 feet tall. surface agitation: expect slight agitation from fill line. performance multiplier 0.9 va por 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 sensor alignment: the sensor will be perpendicular to the liquid surface. performance multiplier 1.0 foam: none. performance multiplier 1.0 dust: none. performance multiplier 1.0 air movement: none. performance multiplier 1.0 ambient temp.: 0 to +120 f. performance multiplier 1.0 pressure: atmospheric pressure. performance multiplier 1.0 will the model 300 work for this application? calculation: multiplied values of all application columns: 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 30 feet (maximum) = 24.3 feet the calculation yields 24.3 feet as the new maximum range. since the tank is 22 feet tall, this application will give satis- factory results. note: the performance estimates provided are conserva- tive estimates. since these factors are subjective, the estimates 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 values. sensor alignment t emperature pressure beam spread interference beam spread interference air movement dust v apors foam surface agitation 6 measurement range calculations
7 measurement range calculations surface agitation: surface agitation or waves can degrade the performance. moderate agitation results in only slight degrada- tion of performance. the worst case is when the surface is a good r eflector, but in the wrong direction. (refer to sensor alignment.) v apor and steam: v apors 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. a void steam if possible. 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 sensor. beam spread interference: it is strongly recommended that nothing be allowed within the sensors 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 r eason,some applications may provide satisfactory results, even with than 60 interference. interference from agitator blades is only an intermittent interference that usually has little effect on perfor- mance. it is recommended there be no interference within the 6 half angle of the sensor beam. if interference is unavoidable, make the inter- ference as far as possible from the sensor so that the real signal at the longest distance is stronger than the interference signal. sensor alignment: optimum performance is obtained when the sensor is perfectly aligned. if the process is not perpendicular to the sound beam, the sound will not reflect properly back to the sensor. the effect is significant. foam: even small thicknesses of foam can attenuate the ultra- sound and render the system inoperative. if possible, moving the sensor to an area in the tank where there is less foam, will improve the performance. thick, heavy density foams can sometimes pro- duce 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 sensors capability to transmit and receive sound. the most noticeable effect on the sensor 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 prob- lems with multiple echoes. smooth, glass-like surface . . . . . . . . . .1.0 slight agitation, choppiness . . . . . . . . .0.9 heavy agitation . . . . . . . . . . . . . . . . . . .0.8 slight vortex . . . . . . . . . . . . . . . . . . . .0.7 multiply all values together in the application column choose a range value from the maximum range table maximum allowable measurement range for this application no condensation . . . . . . . . . . . . . . . . . .1.0 little condensation . . . . . . . . . . . . . . . .0.9 much condensation/ foggy appearance . . . . . . . . . . . . . . . . . . . . . .0.8 no interference within 3.5 half beam angle . . . . . . . . . . . . . . . . . . .1.0 agitator at speed less than 60 rpm . . .1.0 agitator at speed greater than 60 rpm . . . . . . . . . . . . . . .consult factory interference outside 4? far from sensor (in bottom third of range) . . . . . .0.8 interference outside 4? near to sensor (in top third of range) . . . . . . . . .0.5 no foam . . . . . . . . . . . . . . . . . . . . . . . .1.0 light froth, less than 0.25" thick . . . . . .0.8 light foam, less than 0.5" thick . . . . . .0.5 light foam, more than 1" thick . . . . . . .0.1 no dust . . . . . . . . . . . . . . . . . . . . . . . . .1.0 haze, barely perceptible . . . . . . . . . . . .0.7 slight dust . . . . . . . . . . . . . . . . . . . . . . .0.4 heavy dust . . . . . . . . . . . . . . . . . . . . . .0.1 no air movement . . . . . . . . . . . . . . . . .1.0 open vessel, but sensor below rim . . .0.8 open air movement in sound path . . . .0.7 -20 to +140 f (-29 to +50 c) . . . . . .1.0 -40 to -20 f (-40 to +29 c) . . . . . . . .0.9 +140 to +160 f (+50 to +70 c) . . . .0.9 -10 to +50 psig (0.689 to +3.45 bar) . .1.0 pressures outside above rating . . . . . . . . . . . .consult factory beam perpendicular to liquid surface . .1.0 beam 4 off from perpendicular . . . . . .0.5 x performance operating parameter condition multiplier application
8 performance specifications response time 2 seconds typical accuracy ?.25% of calibrated span transmitter specifications supply voltage 120 vac +10%/-15%, 50-60 hz 240 vac +10%/-15%, 50-60 hz 24 vdc, ?0% power consumption 12 watts (without heater) analog output signal active mode 4?0 ma (isolated) maximum 1,000 ? loop resistance passive mode 4?0 ma (isolated) loop resistance dependent on power supply (32 volt maximum) 1,000 ? @ 24 volts digital output rs?85 with modbus relays 10 amp spdt resistive (none, 2, or 4) fail-safe user selectable for analog and relay outputs ambient temperature electronics -40 to +160 f (-40 to +71 c) display two-line alphanumeric lcd (16 characters per line) keypad 16-button humidity electronics 99% non-condensing fuse (non-replaceable) 3 8 amp, 250 vac slo-blo ? for ac units 1 1 2 amp, 250 vdc slo-blo ? for dc units transducer specifications t ransducer frequency 38 khz maximum range 30 feet (9.1 m) maximum span 28.5 feet (8.7 m) deadband 18 inches (460 mm) minimum ambient temperature transducer -40 to +163 f (-40 to +73 c) non-operational to +250 f (121 c) t emperature compensation automatic over range of transducer operating temperature operating pressure ?0 to +50 psig (?.689 to +3.45 bar) beam angle conical 12 cable length 500 feet maximum (between transducer and electronics)
9 1 4-20 ma isolated 3 rs-485 with modbus 5 4-20 ma & rs-485 with modbus output signal 0 no relays ct wo 10-amp spdt relays with gold flash contacts d four 10-amp spdt relays with gold flash contacts relay output g 2" npt kynar, 3" insertion length, l 2" npt kynar, 10" insertion length transducer 300 r 45 300 integrally mounted transmitter model number 300 integrally mounted transmitter b asic model number 0 120 vac, 50/60 khz 1 240 vac , 50/60 khz 2 24 vdc input power models available for quick shipment, usually within one week after factory receipt of a purchase order, through the expedite ship plan (esp)
10 301 r 400 models available for quick shipment, usually within one week after factory receipt of a purchase order, through the expedite ship plan (esp) 301 remote mounted transmitter model number 301 remote mounted transmitter b asic model number 1 4-20 ma isolated 3 rs-485 with modbus 5 4-20 ma & rs-485 with modbus output signal 0 no relays ct wo 10-amp spdt relays with gold flash contacts d four 10-amp spdt relays with gold flash contacts relay output 0 120 vac, 50/60 khz 1 240 vac , 50/60 khz 2 24 vdc input power
037 3176 cable length in feet 10 feet (3 m) minimum, 500 feet (152 m) maximum length example: 12 foot cable length = 037-3176-012 connecting cable part number 11 003 3" (76 mm) length 010 10" (254 mm) length 0 no mounting bracket 3w all mount bracket for 2" npt process connection only 4 floor mount bracket for 2" npt process connection only 0n o housing, 35' (10.7 m) of cable potted into transducer 1 cast aluminum, nema 4x/7/9 housing with 3 4 " npt single conduit, connecting cable ordered separately y 316 stainless steel, nema 4x/7/9 housing with 3 4 " npt single conduit connecting cable ordered separately 2 1" npt, not available with transducer housing code 1 or y 5 2" npt process connection transducer mounting bracket ? 384 k model 384 kynar transducer model number transducer housing transducer insertion length ? transducer mounting bracket not available with 1" npt process connection.
the quality assurance system in place at magnetrol guarantees the highest level of qual- ity throughout the company. magnetrol is com- mitted to providing full customer satisfaction both in quality products and quality service. magnetrol? quality assurance system is regis- tered to iso 9001 affirming its commitment to known international quality standards provid- ing the strongest assurance of product/service quality available. 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. bulletin: 51-130.1 effective: may 2003 supersedes: june 1999 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 heikenstraat 6 b 9240 zele, belgium 052 45.11.11 telex 25944 fax 052 45.09.93 regent business ctr., jubilee rd. burgess hill, sussex rh15 9tl u.k. 01444-871313 fax 01444-871317 copyright ? 2004 magnetrol international, incorporated. all rights reserved. printed in the usa. magnetrol and magnetrol logotype are registered trademarks of magnetrol international. performance specifications are effective with date of issue and are subject to change without notice. the brand and product names contained within this document are trademarks or registered trademarks of their respective holders. quality warranty several echotel model 300/301 ultrasonic level transmitters are available for quick shipment, usually within one week after fac- tory receipt of a purchase order, through the expedite ship plan (esp). models covered by esp service are conveniently color coded in the selection data 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 representa- tive for lead times on larger volume orders, as well as other products and options. e e xpedite s s hip p p lan esp

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