Mobrey ultrasonic liquid level detection systems ATEX

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Elecropulse sensor head amplifier units110mm110mmIndustrial sensor headamplifier60mmMarine sensor head amplifier(IP68)55140mm122120108 6MEP3*I Adjacent sensor headamplifier (IP65)1101. Industrial sensor head mountedamplifier unitThe head amlifier is mounted on thesensor in an IP65 (IP66/IP67 whensuitably glanded) aluminium die castbox. Cable connection via one ortwo PG16 gland holes. Sensor gainpotentiometer adjustable and gainswitch accessible with lid removed.2. Marine sensor head mountedamplifier unitThe head amplifier housing ineither gunmental or stainless steelis permanently mounted on thesensor flange. Cable connection isvia one of the M20 gland holes, intocable clamp and corrosion resistantterminals. Amplifier board is coatedwith polyurethane varnish and isoptionally resin potted. Lid is 'O'- ring sealed. Gain control adjustmentpotentionmeter is factory preset, butsite adjustable.For use with two point sensor twototally separated head amplifiers canbe housed in one MARINE housing.The general design concept of themarine sensor head amplifier is basedon the worst case of deck mounting ona chemical tanker. Typical applicationinvolves two Hi-Sens sensorspositioned for 95% and 98% high levelalarms.3. Adjacent sensor head amplifierHousing polycarbonate box designedfor mounting adjacent to the sensor.Sensor coaxial cables are attachedto terminals in the housing, and thetwisted pair plant cable fits through anM16 plastic gland.Gain switch and adjustmentpotentiometer are accessible with thelid removed.Reverse action unitWith standard head amplifiers asabove, the "NORMAL" condition oncontrol room readout unit occurswhen the liquid sensor is in its active/oscillating condition. (Gap sensor wet,Hi-Sens sensor dry).Model MEP3XI reverse acting amplifier(in the adjacent amplifier type housing)reverses this head amplifier logic,pulses are signalled on the line and"normal" readout is indicated in theMEP3L or MEP3R when the sensoris not oscillating (Gap sensor dry, Hi-Sens sensor wet).Common specificationsFunctionThe head amplifier provides the RFdrive circuitry for the liquid levelsensors (gap type or Hi-Sens) or forinterface detection sensors. Thesesensors are physically attached to thehead amplifier, or mounted very closeto the adjacent amplifier. Signals aretransmitted along the two wire plantcabling to Electropulse control roomunits to provide readout.Design concept - fail safetyThe head amplifier electronic designfeatures fail to safety (no pulseoutput) for any anticipated electronic,mechanical or wiring failure.Hazardous area approvalUnits are available approvedintrinsically safe to ATEX, EN50014,EN50020. Certified II1G EExia IICT4. (-40°C
Electropulse control room electronics75mm112mm150mmElectropulse MEP3L Stand alonereadout unitWall or DIN rail mountedpolycarbonate single readout unit.Front panel LED indicators for liquidlevel sensor, normal, alarm and faultcondition. Single relay outputs deenergisedfor alarm and fault.130mm30mmElectropulse MEP3R Rack mountedreadout cardSingle point readout card for usein a 19" rack system type MEP3B.Front panel LED indicators forliquid level sensor alarm and faultconditions. Independent alarm relayand fault relay.483mm210mm134mm265 mm1. Electropulse MEP3LStand alone readout unitRelay outputEnergised for "Normal" condition.De-energised for "Alarm" conditionafter preset delay. De-energisedfor "Fault" condition. Double polechangeover contacts.Rating:500VA PF 0.4 on MEP3L at 250VrmsAmbient temperature: -10°C to+65°CPower Consumption: 7VACable Entry: Via cutouts in the basethrough rubber grommets to terminalstripProtection: IP202. Electropulse MEP3R Rackmounted readout cardAlarm relay outputEnergised for "Normal" conditionafter preset delay.De-energised for "Fault"condition.(i) DPCO option, relay contact ratingfor MEP3R is 45VA at 250V rms.(ii) SPCO option, relay contactrating for MEP3R is 500Va at 0.4PFFault relay outputDe-energised for "Normal" condition.Energised for "Fault" condition.SPCO relay, contact rating forMEP3R is 500VA at 0.4PFAmbient temperature: -10°C to +55°CPower consumption: 6VAInstallation consideration:Allow at least a 50mm gapbetween each rack on multiple rackinstallations to allow air circulation.On installation of 4 or more racks,the fitting of a cabinet air circulatingfan is recommended.Ordering information on page 17Common specificationFunctionProvides power supply to sensor headamplifier and detects sensor state.Operates output relays and frontpanel LED indicators, providing delayadjustments and control test system.monitors plant wiring integrity.Design concept - fail safetyThe readout unit electronic designfeature fail to safety (alarmcondition) for any anticipatedelectronic, mechanical or wiringfailure.Hazardous area approvalUnits are available approved to ATEXII (1) G [EExia] IIC. This allowssuitably specified plant cabling tobe led directly in the hazardous areaand connected to the Electropulsehead amplifiers.SpecificationInput:220/240V AC + 10% 50/60 Hz110/120V AC + 10% 50/60 HzFront panel LED indicatorsGreen - Normal conditionRed - Alarm conditionAmber - Fault conditionNOTE:Fault condition always triggers alarm.Normal condition is gap sensor wet,or Hi-Sens dry.Delay:Alarm to normal: less than 100msecNormal to alarm: screwdriveradjustable from 1 to 10s.Normal to fault: less than 100 msec.Test:Front panel push to test switchsimulates alarm or fault conditionsand triggers alarm relay (also faultrelay on MEP3R).Output:Supply to Electropulse head amplifier(12V dc) is fully floating (galvanicallyisolated). The output is short circuitproof for short periods only.Electropulse MEP3B Rack forElectropulse cardsRack system housing up to 14MEP3R cards15
Page 1 and 2: Technical specification sheetIP201F
Page 4 and 5: Ultrasonic point level sensors : Di
Page 6 and 7: Sensor technical dataStandard senso
Page 8 and 9: Mobrey standard industrial control
Page 10 and 11: Electrosensor head electronicsMost
Page 12 and 13: Section 5 - Electropulse systems2 w
Page 17 and 18: Ordering informationAdjacent amplie

Mobrey ultrasonic liquid level detection systems ATEX

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