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D-FL 200 / Rev. 6

______________________________________________________________________________________________________

Industrie Elektronik GmbH & Co KG

Gas velocity

Measuring path in the medium

Angle of installation

(Fig. 1) Measuring principle

The two equations shown before for impulse transit times may be reduced down for sonic velocity ‘c’
and gas velocity ‘v’:

⋅

−

Equation 3

2 cos

⋅

−

Equation 4

The speed of the sound changes with the temperature of the gas according to the next formula.
whereby T is in Kelvin. With this equation the gas temperature can be obtained from the measurement.

273

331,6

⋅

Gl.5

Содержание D-FL 200

Страница 1: ...07 00 Rev 6 DURAG Industrie Elektronik GmbH Co KG Kollaustraße 105 D 22453 Hamburg Tel 49 40 554218 0 Fax 49 40 584154 D FL 200 Ultrasonic Flow Monitor ...

Страница 2: ...unctions21 8 2 Storing Entering Parameters by using the Keys 21 8 3 Storing Entering Parameters via the RS232 Interface 21 9 Installation 22 9 1 Mounting the Welding Flanges 22 9 2 Installation of the purge air system 23 9 3 Installation of the sensor units D FL 200 MK 23 9 4 Installation of the evaluation unit D FL 200 10 23 9 5 Start up of the evaluation unit D FL 200 10 24 10 PC Parameterisatio...

Страница 3: ...V 10 Fig 12 Electrical connection 3 phase power supply 400V 11 Fig 13 Dimensional drawing of the purge air system 11 Fig 14 Measurement in a plane through the pipe axis standard 12 Fig 15 Measurement in two planes offset from the pipe axis optional 13 Fig 16 Terminal strip on the housing 14 Fig 17 Layout of the transducer plug 15 Fig 18 Layout of the terminal strip on the sensor board 15 Fig 19 Fr...

Страница 4: ... possible 2 Function The measurement of volumetric flow using ultrasonic probes offers great advantages compared to conventional methods using differential pressure since this type of system operates with no moving parts Conventional screens heavily choke the overall flow and cause pressure losses This causes high energy costs The employment of dynamic pressure probes requires the use of expensive...

Страница 5: ...ion Fig 1 Measuring principle The two equations shown before for impulse transit times may be reduced down for sonic velocity c and gas velocity v c L 2 t t t t Equation 3 v L 2 cos t t t t α Equation 4 The speed of the sound changes with the temperature of the gas according to the next formula whereby T is in Kelvin With this equation the gas temperature can be obtained from the measurement K T 2...

Страница 6: ...n Fig 2 Plane through the pipe axis standard the measured velocity must be weighted according to the geometry of the pipe Fig 2 Plane through the pipe axis standard If flow velocity lies in the lower range the correction factor is 0 75 for cylindrical stacks and 0 66 for square stacks If it is technically feasible to do so a calibration should be performed in such an installation Optional An alter...

Страница 7: ...ptional As shown in Fig 4 Measurement independent of the flow profile optional the measuring planes must be arranged at a distance of r 0 5774 R from the pipe axis The correction factor is k 1 The volumetric flow is determined using four ultrasonic transducers in two planes Q k A v1 v2 2 Equation 7 If only two ultrasonic transducers are used in a plane offset from the pipe axis the volumetric flow...

Страница 8: ..._______________________ Industrie Elektronik GmbH Co KG In general the measurement should result in the standard volumetric flow This requires the following conversion Q Q P P T T n n n Equation 9 with P Absolute pressure hPa Pn Standard pressure 1013 hPa T Temperature K Tn Standard temperature K ...

Страница 9: ... Industrie Elektronik GmbH Co KG 3 System Components The D FL 200 Ultrasonic Flow Monitor consists of the following components D FL 200 10 evaluation unit two or optional four D FL200 MK ultrasonic transducers purge air unit temperature measurement optional absolute pressure measurement optional Fi g 5 System components ...

Страница 10: ...ensate is prevented The purge air system is specially designed for this and has a negligible effect on the ultrasonic signal The transducers are exclusively supplied with auxiliary power from the evaluation unit The piezoelectric ultrasonic sensors are ruggedly built and are designed to withstand environmental conditions 3 1 Evaluation Unit D FL 200 10 Two or optional four transducers may be conne...

Страница 11: ..._____________________________________________ Industrie Elektronik GmbH Co KG Fig 7 Dimensions of the D FL 200 10 evaluation unit 3 2 Transducer The transducer consists of the ultrasonic sensor sensor electronics and welding flange Fig 8 Dimensional drawing of the transducer ...

Страница 12: ... If a purge air system is not used the monitoring system may suffer from excessive dirt accumulation in applications where negative pressure is prevalent This is especially true if the boiler is shut down absence of an upward draft and during start up phase The following points should be considered when selecting a location to mount the purge air system The intake air must be as dry and dust free ...

Страница 13: ...The motor safety switch not included must be set to the rated current of the motor The direction of rotation of the motor must be checked Arrow on the cover Ensure a separate power supply for the purge air system because the purge air has to blow all the time Use the wiring diagram as shown in Fig 10 Electrical connection of the purge air system if your power supply is single phase In the case of ...

Страница 14: ...______________________________________________________________________________________ Industrie Elektronik GmbH Co KG Erde Ground Fig 12 Electrical connection 3 phase power supply 400V Fig 13 Dimensional drawing of the purge air system ...

Страница 15: ...es but also for any necessary future maintenance The measuring path should if possible be set up at an angle of 45 If the interior diameter of the stack is very great the equipment may be installed at a flatter angle According to the flow direction the angle should be at the very most 60 Also the maximum measuring path length for the acoustic signals may not be exceeded Maximum measuring path leng...

Страница 16: ...ting the D FL 200 10 Evaluation Unit The correction factors can be improved by parallel measurements of an independent agency if necessary If the duct runs horizontally the transducers may be installed in a horizontal plane If the transducers are installed in a vertical plane the lower sensor will more easily accumulate condensate and dust 5 Electrical Connection D FL 200 5 1 Electrical Connection...

Страница 17: ...D FL 200 Rev 6 14 ______________________________________________________________________________________________________ Industrie Elektronik GmbH Co KG Fig 16 Terminal strip on the housing ...

Страница 18: ...delivered with a plug connection The terminal layout is shown in Fig 17 Layout of the transducer plug Fig 17 Layout of the transducer plug The sensor electronics are located in the transducer along with a terminal strip This terminal strip was wired to the plug at the factory The pin out of this connector is shown in Fig 18 Layout of the terminal strip on the sensor board Fig 18 Layout of the term...

Страница 19: ...formed for two minutes Each sensor transmits two brief impulses which are received by the opposite sensor This sequence is repeated in both directions The zero point is checked using the evaluation formulas noted above 6 2 2 Span Test During the span test staggered signals are transmitted and received Using the evaluation formulas the reference point can be checked 6 3 Monitoring The system automa...

Страница 20: ...em is in measuring mode Check Cycle The system is doing a check cycle Limit Value The limit value is reached The three lower LED s indicate the following LED Display Display Functions Display Select Display The operator may choose to display the gas velocity operating volumetric flow standard volumetric flow and temperature Measurement continues when switching from one display to the next The Meas...

Страница 21: ...ble else 0 320 Sensor B for 10 s index position 400 3000 for 8 s amplification 0 0 0 512 for 8 s transmit power 0 0000 0 0100 cyclic rotation of these 3 values signal amplitude 0 204 noise value max 450 If STO Key is active then amplification is variable else 0 320 Sensor C for 10 s index position 400 3000 for 8 s amplification 0 0 0 512 for 8 s transmit power 0 0000 0 0100 cyclic rotation of thes...

Страница 22: ... the standard volumetric flow measurement 1 99 99x10 3 Nm h R09 span mA out2 Measuring range end value of the mA output for the gas velocity measurement 0 99 99 m s R10 measuring plane 1 Measuring plane 0001 2 Measuring planes 0002 corresponds with two transducers standard corresponds with four transducers R11 calculation mode Calculation mode Calculation 0000 0001 0002 0003 0004 0005 0006 constan...

Страница 23: ... evaluated If this appears 30 seconds in a row the error detection is launched E16 E19 0 2000 default 350 R24 amplifier target Set point for the automatic gain control constant 1900 R25 amplification f Amplification factor manual automatic values between 1 and 512 will set the variable amplifier to a fixed amplification values greater than 512 enable the automatic gain control 0 1000 default 600 R...

Страница 24: ...ay mode The MOD LED is illuminated The key causes that the parameters will be displayed one after the other according to the second table below Fig 19 The corresponding parameter appears in the display Pressing the STO key switches the system into the Input mode The STO LED is illuminated The and can be used to change the value in the display The longer these keys are pressed the more quickly the ...

Страница 25: ...g flanges should be mounted on the stack as shown in the drawing below The flange tubes should project slightly into the interior of the stack This helps to prevent condensate from accumulating The standard angle is 45 You have to ensure that there is enough space to build in the measuring heads The length of the measuring head depends on the respective wall thickness The standard lengths are list...

Страница 26: ...tream when four sensors are used the sensor A is equivalent to C and sensor B is equivalent to D The sensors are all the same the indication with A to D is only necessary to connect the sensors in the right order to the evaluation unit If the temperature of the gas is higher than 120 C 248 F or there is aggressive gas permanent purging is necessary to protect the sensor This is also necessary if t...

Страница 27: ...e right way internal external If the data has changed the new parameters can be introduced as described in section 8 Operating the D FL 200 10 Evaluation Unit page 17 For the set up of the system the programmed measuring path length is the most important parameter If the programmed length is extremely different from the real length the system looks at the wrong time period for the transmitted sign...

Страница 28: ...stem The tables code1 and code2 appear again to improve the handling of this manual 10 1 Installation of the program The program is working on PCs with Windows 3 1x as well as Windows 95 98 For the installation insert the disk into the floppy drive and go to your floppy directory and call install The installation batch file will create a new directory on the hard disk C FLCOM Afterwards it copies ...

Страница 29: ...at case the parameter of the system is displayed If the contents of the entry field and the system parameters are equal the entry field remains white With the Write Button the parameters from the PC are sent to the D FL 200 10 The state bar in the lower part of this page tells the actual state of the communication The special parameters R22 R33 are normally not visible This is because the normal u...

Страница 30: ...n to the standard volumetric flow 1 9999x10 3 Nm 3 h 1Nm 3 h 35 3Nft 3 h R03 measuring path Measuring path length 0 30m 1m 3 28ft R04 Angle Angle of installation 0 80 R05 Cross section Stack cross section 0 99 99m 1m 10 76ft R06 Corct factor Correction factor 0 5 default 1 R07 Offset Zero point offset 2m s 2m s default 0 R08 Span mA out1 Measuring range end value of the mA output for the standard ...

Страница 31: ... pressure input ultrasonic temperature calculation and constant absolute pressure output of the ultrasonic temperature on standard flow output measuring range 0 400 C corr 32 752 F R12 zero_tmperature_in Beginning of measuring range for temperature sensor 4 mA 0 800 C corr to 32 1472 F R13 Span_tmperature_i n End of measuring range for temperature sensor 20 mA 0 800 C corr to 32 1472 F R14 Zero_pr...

Страница 32: ...bled 1 disabled 0 single error evaluations can be disabled by setting the value or the sum of values 2ÆE12 E15 4ÆE16 E19 8ÆE20 E23 16ÆE24 E27 32ÆE28 E31 64ÆE32 E33 R28 zero suppress Zero suppress of gas flow velocity 0 3m s 10ft R29 sensor offset Sensor offset 0 600mm corr to 23 6in default 0 R30 noise limit noise limit signals with a higher noise component are not evaluated If this appears longer...

Страница 33: ...c refresh automatic refresh every 5 seconds ERROR automatically display of the error code Velocity gas velocity m s 1m s 3 28ft s Standard Flow standard gas flow m h 1m h 35 3ft h Flow absolute gas flow m h 1m h 35 3ft h Temperature gas temperature C y F 1 8x C 32 Absolute Pressure absolute pressure hPa Speed of Sound stored speed of sound m s 1m s 3 28ft s State state of communication data receiv...

Страница 34: ... the maximum value inside the array of 3000 values This represents the time window in which the system looks for the ultrasonic signal This time window is set by the programmed length of the measuring path and the programmed speed of sound This value should be somewhere in the middle of the array about 1500 index Position of the trigger point inside the displayed part of the array of 512 values am...

Страница 35: ...r service if necessary E 02 RAM Error Error in the working memory Power up the system again contact DURAG customer service if necessary E 03 PROM Error Error in the program memory Power up the system again contact DURAG customer service if necessary E 04 Temperature transmitter lower than 3 6 mA E 05 Pressure transmitter lower than 3 6 mA E 06 Temperature transmitter higher than20 mA E 07 Pressure...

Страница 36: ...ctly programmed E 29 Signal B not available look at E 28 E 30 Signal C not available look at E 28 E 31 Signal D not available look at E 28 E 32 wrong path length stored The device does not receive a signal in expected time Either there is no sensor connected or the measuring path length is not correctly programmed E 33 calculation overflow The calculation exceeds the normal value range The paramet...

Страница 37: ...ing of the external components of the transmitters and the evaluation unit 2 Inspection of the purge air system and hose connections Personnel should check for any leaks and verify that the hoses are firmly in place 3 Visual inspection of the pre filter The pre filter must be emptied out as soon as the dust reaches the level marked on the pre filter No tools are required to empty the pre filter Th...

Страница 38: ...ns D FL 200 AuB 1 For ducts with gas temperature above dew point The length number of the flange and the measuring head must be added according to the figures in section 15 Technical Data page 38 D FL 200 standard system MK2 Description Order no Quantity Consist of D FL 200 standard complete system D FL 200 SYS2 1 1 evaluation unit D FL 200 10 1 2 sensor unit 50kHz D FL 200 MK2 2 3 welding flange ...

Страница 39: ...int The length number of the flange and the measuring head must be added according to the figures in section 15 Technical Data page 38 Optional accessories Description Order no Quantity 1 temperature transmitter D FL100 TM H 1 2 pressure transmitter D FL100 ADM H 1 3 purge air unit E incl 10m 33ft purge air hose D FL 200 GN 1 4 acid resistant purge air hose wdisäureschlauch 10m 5 gas flow protecti...

Страница 40: ... AR41 2 3 ultrasonic transducer AR30 for system 3 D FL200 AR30 2 4 signal cable 15m 49 ft BFL 200 Leitung 1 5 fuses 0 5 A 230V mains for 230V supply 10 6 fuses 1 A 230V mains for 115V supply 10 7 fuses 1 6 A 230V for 24V 10 Purge air unit 8 filter cartridge P77 5308 for purge air unit wdilfilter5308 1 9 filter case FP G05 7505 for purge air unit wdilfilter7505 1 10 air hose Ø 40 mm 1 5in wdiluftsc...

Страница 41: ... signal 2 current outputs 4 20mA Maximum ohmic resistance 500 Ω Auxiliary power 24V 1A for maximum of four sensors Enclosure rating IP 65 NEMA 4X Transducers Auxiliary power 24V DC Permissible ambient temperature 20 to 60 C 4 F to 140 F Flange special flange tube 110x5 Material of the process parts 1 4571 standard Housing material of the evaluation unit Aluminium Flue gas temperature up to 250 C 4...

Страница 42: ... standard Flange length Flange No length of the flanges 1 235 mm 9 2 in 2 335 mm 13 2 in Standard 3 535 mm 21 1 in 4 735 mm 28 9 in 5 935 mm 36 8 in Ö To combine the measuring head and the flange pay attention that measuring head no and flange no are equal Purge air unit G for gas above dew point Mains 230V 10 50Hz Others on request Power consumption 0 25kW at 230V Air volume at 0 mmWS app 1 4 m m...

Страница 43: ...Telefax Anzahl der Messköpfe Number of sensors 2 Messköpfe Standard 2 Sensors standard 4 Messköpfe 4 Sensors Anzahl der Geräte Number of devices St pc Gas Medium Medium Gas type Normdichte Standard density kg m CO2 Anteil CO2 share Vol aggressive Gasbestandteile aggressive gas components Staubbeladung Dust load mg Nm Welche Which Anteil Share Anlagenbedingungen Plant Conditions Gas Temperaturberei...

Страница 44: ...ter mm ohne Isolation without insulation Isolationsstärke Insulation thickness mm Wandstärke Wall thickness mm Einlaufstrecke Uninterrupted flow Distance before sensor mm Auslaufstrecke Uninterrupted flow Distance after sensor mm Kanalrichtung Duct direction Horizontal Horizontal Vertikal Vertical Innen Indoor Außen Outdoor Elektrischer Anschluss Electrical Connection Spannung Voltage 115V 230V an...

Страница 45: ...culation of the standard flow Temperaturmessung Temperature measurement externer Sensor External sensor Messbereich Range D FL 200 Messung D FL 200 reading C konst Temperatur const temperature Absolutdruckmessung Pressure measurement externer Sensor external sensor Messbereich Range konstanter Druck constant pressure hPa Weitere Hinweise Further remarks Zeichnungen anbei Drawings enclosed ...

Страница 46: ...riften und Hinweise aus der Bedienungsanleitung sind zu beachten The described product complies with the following provisions of Council Directive provided that it is installed maintained and used in applications for which it was made in accordance with relevant installation standards and manufacturer s instructions Richtlinie des Rates 89 336 EWG EMV geändert durch 91 263 EWG 92 31 EWG und 93 68 ...

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