Technical Information Electromagnetic …

1 TechnicalInformationTI 027D/06/enNo. 50063743 FlexibleSystem Wide choice of materials for processconnections and measuring tubelinings, compatible to the fluid Transmitter housing and display canbe rotated to fit the orientationOperationalSecurity ISO 9001 manufacturer High Electromagnetic compatibility(EMC) High operating integrity throughself-monitoring with alarm function Data protection with EEPROMon power failure (without batteries) Empty Pipe Detection (EPD)EasytoOperate Illuminated, double-spaced display Touch control: Operation from outsidewithout opening the housing E+H operating matrix menudrivenoperation for all instrument parameters Interfaces: HART, PROFIBUS-PA,PROFIBUS-DP, Rackbus RS 485 MeasurePrecisely Measured error: or 1000.

2 1 operable flow range Excellent repeatabilityInstallAnywhere Robust, shock-resistant aluminiumhousing, resistant to acids andcaustics IP 67 protection for compact andremote versions (optional IP 68 sensor) Wide size range DN (1 ") Flanged version with ISO meter lengths Hygienic sensor for food and pharma-ceutical applications Ex versions for use in Ex Zones 1 and 2 ElectromagneticFlow Measuring Systemprmag33 Hauser+EndressNothing beats know-howMeasuring SystemFieldsofApplicationWith the Promag 33 flowmeter mostliquids can be measured providedthey have a minimum conductivity of 5 S/cm, acids, alkalis, pastes, pulps, drinking water, wastewater,sewage sludge, milk, beer, wine, mineral water,yoghurt, molasses, minimum conductivity of 20 S/cmis required for measuring 33 is available in a number ofEx versions for use in Ex Zone 1 and Information is given in theappropriate Ex documentation.

3 YourE+H representative will be pleased tohelp measuring system consists of: Promag 33 transmitter Promag A, H or F sensorThe Promag 33 measuring system ismechanically and electronicallydesigned for maximum flexibility withthe transmitters and sensors beingcombined in any variation. The widerange of materials and processconnections (fittings; flanges DIN, ANSI,JIS; Tri-Clamp, etc.) ensure that themeasuring point can adjust to both plantand process 33 Compact versionRemote version(with wall mounting)PromagADN versions (communication): HART PROFIBUS-PA PROFIBUS-DP Rackbus RS 485 EEx i2 FunctionMeasuringPrincipleAccording to Faraday's Law of MagneticInduction, a voltage is induced into aconductor which moves in a magneticfield.

4 With the Electromagnetic measur-ing principle, the flowing fluid is themoving conductor. The induced voltageis proportionally related to the flowvelocity and is fed to the measuringamplifier by a pair of electrodes. Usingthe pipe cross-sectional area, the flowvolume is DC magnetic field is generated bya switched direct current of alternatingpolarity. Together with the patented Integrated Autozero Circuit , this guar-antees a stable zero point, and makesthe measurement fluid-independent andinsensitive to entrained solid meter is factory calibrated withthe most modern calibration rigs, trace-able to national Promag transmitter converts themeasured values coming from thesensor into standardised output following outputs are available forthese signals: Current output Pulse / Frequency output Alarm output (Relay 1) Status output (Relay 2)Promag 33 also has the followingfeatures.

5 Relay 1 and 2 are freely configurable Auxiliary input (positive zero return,totalizer reset, batching, dual rangemode) Empty Pipe Detection (EPD) detectsand indicates partially filled or emptymeasuring tubes. The special electrode cleaning cir-cuitry (EEC) ensures accurate flowmeasurement even with conductivebuild-up in the measuring tube( magnetite).ti027y01Ue=B L vQ=v AUe= induced voltageB = magnetic induction (magnetic field)L = distance between measuring electrodesv = flow velocityQ = volume flowA = pipe cross-section3 OperationDisplayandOperationThe Promag 33 measuring system isequipped with an illuminated, double-spaced LC display. This ensures that allimportant variables can be read off andcontrolled directly at the measuringpoint: Technical units Current output functions Totalizer functions Pulse and frequency output functions Relay functions Limit values Batching functions with integral presetcounter Display parameters Creep suppression Empty pipe detection (EPD) Single and bidirectional measurement Auxiliary inputThree operating keys are used forselecting and setting all functions of theinstrument.

6 The E+H operating matrixallows quick and easy access to allindividual languages are selectable for thedisplay text. A help function (diagnosisfunction) is available during on which module is fitted,Promag 33 has different interfaces forcommunication ability with higher levelsystems: HART protocol (SMART technology)is possible on the current output. Direct communication to a personalcomputer and the E+H Rackbus worldis possible via the RS 485 interface. The PROFIBUS-PA version providesan indirect connection to processcontrol systems via segment couplers. Promag 33 is also available as aPROFIBUS-DP version for connectingto a PROFIBUS-DP communication feature enablesoperation and configuration ofinstruments which have no local +ENDRESS+HAUSERPROMAG>3sti027y03 Infraredreceiving diode3 optical keypads ( Touch Control ): Access / leave operating matrix Select functions Set / store parametersLC display:illuminated,double-spacedFunctio n symbols(from left to right) Access to theoperating matrix Returning to HOME position Diagnosis functionInfrared trans-mitting diode4 Diameter SelectionAs a rule, the pipe diameter determinesthe sensor nominal necessary increase in velocity can beachieved through a reduction of thesensor diameter (see page 8).

7 The higher installation expense isnormally balanced by the lower flow velocity (v) is also to be deter-mined by the fluid's physical properties: v < 2 m/s: with abrasive fluids, 's clay, lime milk, ore slurry v > 2 m/s: with fluids causing build up, wastewater slurry table below summarizes the mini-mum and maximum full scale values forthe current output (incl. factory settings).DNFull scale values [m3/h][mm][inch]Minimum full scaleat v = m/sFactory settingat v ~ m/sMaximum full scaleat v = 10 m/s2481525324050658010012515020025030035 0400450500600700750800900100010501200135 01400150016001700180020001/12"5/32"5/16" 1/2"1"11/4"11/2"2"21/2"3"4"5"6"8"10"12"1 4"16"18"20"24"28"30"32"36"40"42"48"54"56 "60"64"66"72"78" mounting:This is the recommended position withthe flow upwards.

8 Entrained solidparticles sink and fatty components inthe stationary fluid rise away from themeasuring electrodes. This is theoptimal position in empty pipe systemand when using Empty Pipe mounting:The axis of the electrodes must behorizontal, thus preventing brief insula-tion of the electrodes by entrained axis:The plane in which the electrode axislies with regard to the transmitter isidentical for the Promag A, H and sensor should be mounted awayfrom fittings such as valves, T-pieces,elbows, section: 5xDNOutlet section: 2xDNThe inlet and outlet sections must beobserved in order to maintain piping before and after the sensorshould be securely fastened if thereis excessive vibration. Information onshock and vibration resistance is foundon page vibration necessitatesseparate mounting of the sensor support of the sensor isrecommended for free runs of pipingover 10 m order to measure correctly and to prevent damage, please observe the followinginstallation 5 x DN 2 x DNti027y07>10mMeasuring electrodesElectrode axis(Example Promag F)ti027y046 MountingLocationCorrect measurement is only possiblewhen the pipe is full.

9 The followinglocations should therefore be avoided: No installation at the highest point(air accumulation). No installation immediately beforean open pipe outlet in a alternative installation, however,permits a correct inclines a mounting similar to a drainshould be adopted. Added security isoffered by Empty Pipe Detection (EPD)in order to detect empty or partly !Danger of solids accumulation!Do not mount the sensor at the lowestpoint of the drain. A cleaning valveshould also be the installation suggested opposite,partial vacuum is avoided even with adownward pipe > 5 m long (siphon, ventvalve downstream of the sensor).InstallationofPumpsDo not mount the sensors on thesuction side of prevents low pressure and preventspossible damage to the lining of themeasuring dampers should be installedwhen using reciprocal, diaphragm orperistaltic ti027y08alternativelyti027y09 2 x DN 5 x DN>5mVenting valveti027y10ti027y117 MountingAdaptersThe sensor can also be mounted in apipe with a larger nominal diameterwhen suitable adapters (reducers andexpanders) to DIN 28545 are resultant increase in the rate of flowincreases the accuracy of measurementwith slowly moving adjacent nomogram can be used todetermine the pressure loss caused:1.

10 Determine the ratio of thediameter From the nomogram read off thepressure loss at the flow velocityand d/D !The nomogram applies to fluids with aviscosity similar to that of different versions are available forthe remote version:FS version The permissible cable length greaterthan 10 meters is governed by thefluid conductivity (see Figure). Permissible cable length of meters if the instrument is equippedwith an Empty Pipe Detection (EPD)electrode. The FS cable is recommended only fordistances smaller than 20 version All fluids with a minimum conductivityof 5 S/cm (demineralised water 20 S/cm) can be measuredindependent of the cable length. Empty Pipe Detection (EPD) is notavailable with this also note the following: Fasten the cable gland or lay it in aconduit.