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in a lvdt the two secondary voltages vary

Posted by on 2021-01-07

b) Strain gauge or capacitive transducer c) Silver – Silver chloride electrode 50. Ans : (b) 29. ALL ABOUT THE SCIENCE AND TECHNOLOGY...."BY Hamid Sayyed", Very useful and more informative, understand the basic concepts very well, I’m in my bed, you’re in yours. )( . b) Pressure into a change of resistance Match the following 1. Quartz and Rochelle salt belongs to _______ of piezo-electric materials, a) Natural group Stethoscope D. instrument used to hear pulse/heart beat, a) 1- B, 2 – A, 3 – C, 4 – D This results in the two signals on each secondary being 180 deg out of phase. a) Static b) Dynamic c) Transient d) Both static and dynamic. b) Length of wire Figure 3 depicts a cross-sectional view of an LVDT. The voltage displacement of LVDT. b) Aluminium 1. the diff erential AC voltage between the two secondary windings, which varies with the axial position of the core within the LVDT coil. The output voltage will be the difference between the two voltages (VS1-VS2) as they are combined in series. [All About Battery connector pinout 4mgf) It is used to measure the battery temperature. b) Both S1 and S2 are true Each lab station will use a different LVDT model. b) Finger movement please update your website there are many answer is wrong. b) Primary sensor The AC excitation voltage is 5 to 12V and the operating frequency is given by 50 to 400 HZ. d) Resistance, a) 1 Photo emissive cathode & 2 dynodes d) Unpredictable, 21. 14. b) Change in length of the wire The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ______ transducer. b) Displacement of a contact slider on a resistance b) When radiant energy stimulates the crystal c) S1 is false and S2 is true a) LDR Movement of the core triggers the linkage from primary to both the secondary coils, which changes the induced voltages. Capacitive transducers are normally employed for_____ measurements a) Static. 4. a) Active d) Pressure measurement, 12. b) S2 and S3 Barium titanate b) Mutual inductance According to the AD598 datasheet, the input voltage range is 1~3Vrms. Cadmium and sulphate, a) 1,2 and 4 a) Are independent of the core position b) Vary unequally depending on the core position c) Vary equally depending on the core position d) Are always in phase quadrature. Silver chloride electrode is used as a reference electrode due to its, a) Large half cell potential Esteem iron core is placed in the centre of the cylindrical former which can move in to and fro motion as shown in the figure. These inductive sensors use a primary coil to generate an AC magnetic field; the magnetic field then couples onto two secondary coils to generate voltages. d) LVDT, 5. Range of frequency is usually from 1 to 10 kHz. 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Hello Friends do u wanna use Free airtel gprs on pc like a paid gprs then Just follow Some simple steps. a) S1 is true & S2 is false Hey, i am looking for an online sexual partner ;) Click on my boobs if you are interested (. d) Photo multiplier, 44. b) Inductive b) Vary unequally depending on the core position c) Natural or Synthetic group c) Passive transducer Fiber optic sensor can be used to sense _________, a) Displacement c) Electrical energy into thermal energy d) Pulse transducers. c) Resistive transducer Pick the correct statement regarding functions of a transducer, S1: Sense the magnitude, change in & / or frequency of same measurand However, when the core moves away from this central position the amount of induced flux that is coupled into the two secondary coils becomes unequal, which creates a voltage differential in the … b) Exclusively used for stress analysis Photo conductive cell consists of a thin film of, a) Quartz d) Copper, 20. b) Analog transducer Capacitive transducers are normally employed for_________ measurements, a) Static a) Remains unaltered A rotary variable differential transformer (RVDT) is a type of electrical transformer used for measuring angular displacement.The transformer has a rotor which can be turned by an external force. d) 1 – A, 2 – B, 3 – C, 4 – D, 30. The excitation typically ranges in amplitude from 1 to 10V and in frequency from 1 to 10 kHz, depending on the type of LVDT you employ. c) Change in both length and diameter d) Primary electrode, 41. on the two secondary. One of us is obviously in the wrong place. A rod-shaped soft magnetic core inside the coil assembly provides a path for the magnetic flux linking the coils. The parameter ‘G’ denotes the RVDT Sensitivity Theta (ϴ) defines the angular displacement of the shaft and is given by, θ=G*(Es21-Es22)/(Es21-Es22))——(1) The secondary voltage is calculated with the equation Es22=Es22±G*θ——(2) The differential output voltage across the secondary side is given by, ∆Es22=2*G*θ——(3) d) Both S1 & S2 are false, 27. 3. Ans : (d) An LVDT, the cylindrical soft iron core is used to calculate the linear displacement, whereas the cam-shaped rotary ferromagnetic core in RVDT for angular displacement measurements. D = 2.75 X 120/2.4 = 137.5 mm. Match the following 1. a) Force c) Same The 0.22µF capacitors on the U1 power pins don’t affect the LVDT operation – they only prevent the op amps from oscillating due to the long leads from the power supply to the breadboard. b) Larger LVDT is an electro-mechanical displacement transducer [9],[13], which has three coils namely one primary and two secondary. The sensitivity range of LVDT is high, ranging 2.4mV per the voltage and per degree change in moments and 2 to 3 mV per voltage per degree rotation in RVDT. When the core is moved to one side, the net voltage amplitude will increase. The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as, a) Active transducer ECG B. Figure 1: Linear variable differential transformer (LVDT) The secondary windings are wound out of phase with each other. 23. d) Are always in phase quadrature, 28. Vchange = +60mm – (-60mm) X 2.4V/130 = 120 X 2.4/130 = 2.215. b) Electrical quantity into mechanical quantity The resistance of LDR ________________ when exposed to radiant energy. Null Position– This is also called the central position as the soft iron core will remain in the exact center of t… d) Change in resistivity, a) Exclusively used for construction of transducers Current in the primary coil induces e.m.f. b) Dynamic c) Transient d) Both static and dynamic Ans : (b) 29. Moving the extension between the primary and secondary windings of a transformer causes the inductance between the two windings to vary, thereby varying the output voltage proportional to the position of the valve or control rod extension. If the two secondary coils are wired in series opposition, as shown in Figure (4.6), then the two voltages will subtract; that is, the differential voltage is formed. 2 to be induced in each secondary coil, which is proportional to their mutual inductance with the primary coil. d) Heat, 17. The change in resistance of a metal wire owing to strain is due to. The size of air cored transducers in comparison to the iron core parts is, a) Smaller c) Resistive Ans : (b) 28. In a LVDT, the two secondary voltages, a) Are independent of the core position Displacement = Vout X length/ VMax . b) Inverse transducers 39. When the primary coil is energized by an alternating current, source voltages are induced in the two secondary coils. 1. When the core is centered, the voltages in the two secondary windings oppose each other, and the net output voltage is zero. Awesome Inc. theme. c) 1- C, 2 – A, 3 – B, 4 – D b) Passive transducers c) Used for both stress analysis and construction of transducer d) Pressure. c) Stable resting potential )( .). S2: They are expensive, brittle and sensitive to temperature First of all u will need OPERA ... UNIQUEE TECHNOLOGIES AHMADNAGAR , INDIA. Accept Read More, Measurement and Instrumentation Objective Questions – Part 5, Measurement and Instrumentation Objective Questions – Part 4, Temperature Balance System Objective Questions, Flow Measurement Multiple Choice Questions, High Pressure Liquid Chromatography Questions & Answers, Analytical Measurement Multiple Choice Questions, What is FAT and SAT? b) Parabolic path S2: To provide electrical output that furnishes accurate, quantitative data about the measurand, 31. Also See : LVDT Working Animation. Generally, when the moveable core/slug is positioned symmetrically relative to the two secondary windings (at the “null” position), the differential output may be approximately zero, because the voltage of each secondary coil winding is equal but of opposite phase. Pressure transducer for measuring blood pressure is, a) Strain gauge transducer only In a LVDT, the two secondary voltages a) Are independent of the core position b) Vary unequally depending on the core position c) Vary equally depending on the core position d) Are always in phase quadrature. b) Synthetic group The principle of operation of variable resistance transducer is, a) Deformation leads to change in resistance d) Photo-resistive, 13. The magnetic flux, which is developed, is coupled by the core to the adjacent secondary windings S 1 and S 2. b) 1,3and4 d) Glass electrode. S1: In multimode fiber optics, intensity modulating schemes can be employed. c) Both S1 & S2 are true d) Movement of magnetic field produces variation in resistance of material, a) Joint motion Most commonly used indicator electrode is, a) Calomel electrode Piezo – electric transducers work when we apply ________ to it. d) Both S1 and S2 are false, a) Indicator electrode d) S1 only, a) Steel sheets c) When external magnetic field is applied d) When the junction of two such crystals are heated, S1: Low fatigue life The … c) Birefringent Vout = 110 X 2.4/120 = 2.2 volts. Capacitive transducers are normally employed for_____ measurements. a) Monomode It consists of a primary coil with two secondary coils placed on either side of the primary coil. Strain gauge, LVDT and thermocouple are examples of, a) Active transducers Principle of Operation and Working. c) Digital transducer By designing the signal conditioning electronic circuitry to measure the difference over sum ratio (V - V b) / (V + V ), one can see that the first order of the temperature coefficient of sensitivity is eliminated. a) Mechanical force In normal use, there is no mechanical contact between the LVDT's core and coil assembly, so there is no rubbing, dragging, or other source of friction. c) Force into a displacement b) 2 Photo emissive cathodes & 2 dynodes Capacitive transducers are normally employed for_____ measurements a) Static b) Dynamic c) Transient d) Both static and dynamic Ans : (b) 29. Save my name, email, and website in this browser for the next time I comment. Lead titanate b) Photo-electric c) Reluctance a) Strain gauge When the core moves away from the center of the LVDT, known as the null point, the signal from the primary will be coupled to one secondary more than the other. The displacement to be measured is applied to an arm connected to the core. 2. The results on the secondary side—typically, two secondary windings—depend on the position of the core . Measurement and Instrumentation Objective QuestionsÂ. 4. The operation frequency is usually in the range between 1 and 10 kHz [2]. b) 1 – B, 2 – A, 3 – D, 4 – C If the core is moved out of the centre, the voltage rises in one coil and decreases in … d) Fiber optic transducer, 36. As the primary is connected to an AC source so alternating current and voltages are produced in the secondary of the LVDT. ________ fiber is used in interferometric instruments. In a graded index fiber, the total reflected light takes a _________, a) Straight line path I'll use AD598 for 5-wire LVDT signal conditioner. Alternating current drives the primary coil causing voltage induced in the two secondary coils proportionate to the length of the linking core. c) Thermistor Alternating current drives the primary coil causing voltage induced in the two secondary coils proportionate to the length of the linking core. b) 25 micron (or) less Match the following. d) Primary transducers, 6. S2: Change in resistance ? d) Circular path. 1. c) Elliptical path d) Selenium. Due to the opposite windings of the two secondary coils, when the core is positioned in the magnetic center of the transformer the two secondary coils cancel one another and no voltage is measured at the output. Match the following 1. d) Both static and dynamic, 1. c) Transient In a LVDT, the two secondary voltages. d) Electrical energy into light energy, 7. When the core is moved off center, the voltage in the secondary toward which the core is moved increases, while the opposite voltage decreases. Range of frequency is usually from 1 to 10 kHz. b) Encoder Usually this AC output voltage is converted by suitable electronic circuitry to high level DC voltage or current that is more convenient to use. c) Photo transistor c) Current When the core is positioned in the middle, the voltages of secondary coil 1 and secondary coil 2 are equal. There are two types of LVDT to be applied to our system, one of output voltage range is 1.25~3.75Vrms and the other is 5Vrms. Top and … Let us consider three different positions of the soft iron core inside the former. As shown in the figure above, an ac voltage with a frequency between (50-400) Hz is supplied to the primary winding. POSITION AND MOTION SENSORS 6.3 SCHAEVITZ E100 LVDT SPECIFICATIONS n Nominal Linear Range: ±0.1 inches (± 2.54mm) n Input Voltage: 3V RMS n Operating Frequency: 50Hz to 10kHz (2.5kHz nominal) n Linearity: 0.5% Fullscale n Sensitivity: 2.4mV Output / 0.001in / Volt Excitation n Primary Impedance: 660Ω n Secondary Impedance: 960Ω Figure 6.3 Note that a true null does not occur when … One of the most important features of an LVDT is its friction-free operation. This feature is particularly useful in materials testing, vibration displacement measurements, and high resolution dimensional gaging systems. 4. Figure F1 illustrates a valve whose position is indicated by an LVDT. c) Limb movement c) Heart sound c) Analog transducers d) Self generating transducer, 32. S1: Transducer is a device which converts physical into electrical quantity An LVDT is also known as Linear Voltage Differential Transformer is a passive transducer which translates the linear motion into an electrical signal. The result is a … c) 2 Photo emissive cathodes & 1 dynode Which of the following is a digital transducer? d) Inverse. The effective voltage and LVDT output is the difference between each secondary. c) Thermo-electric This website uses cookies to improve your experience. The sensitivity factor of strain gauge is normally of the order of, a) 1 to 1.5 b) Dynamic EEG A. b) Vibrations 3. b) Velocity The two secondary coil is represented as S1 and S2. c) 1,2and 3 c) Reaches maximum d) Eddy current. The two secondary coils are series-opposed, which means wound in series but in opposite directions. 16. c) Coupling of two coils changes with displacement In foil strain gauge the thickness of foil varies from, a) 2.5 micron to 6 micron (Image: TE Connectivity) The LVDT’s primary winding, P, is energized by a constant-amplitude AC sine-wave source, which is usually between 1 kHz and 10 kHz. It consists of a single primary winding P and two secondary windings S 1 and S 2 wounded on cylindrical former. 1. a) S1 is true and S2 is false Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. They vary in the amount of linear travel allowed for the LVDT core. d) Stable action potential, 45. b) Blood flow The resistance of LDR ______ when exposed to radiant energy. d) 2,3and 4, a) Passive transducers ), All About Battery connector pinout of mobile phone, how to remove yuyun virus microsoft,ink virus, Vodafone Free 100 LOCAL/STD SMS Trick For 1Rs With NO VALIDITY, HOW TO ENTER FRONT QUERY IN SEARCH ENGINE AND SURF FREE INTERNET IN OPERA MINI. Therefore phase of the output signal determines direction and its amplitude, distance. 47. secondary voltages (V a + V b) remains constant over the displacement measuring range. A movable soft iron core is placed inside the former. 24. c) Vary equally depending on the core position Piezo electric crystal can produce an emf, a) When external mechanical force is applied to i b) Passive b) Lithium sulphate Thus, the net output of the LVDT may be the difference between the two secondary voltages. Fig 3: As the core moves, the relative coupling and signal output voltage of the two secondary windings changes. Ans : (b) 29. c) S1 and S3 Quiz on Transducer :- 1. d) Permanence, a) Magneto-strict ion 3. b) Power 37. Because, for constant excitation voltage, the sum of the two secondary voltages is almost constant throughout the operating stroke of the LVDT, its value remains within a small window and can be monitored such that any internal failures of the LVDT will cause the sum voltage to deviate from its limits and be rapidly detected, causing a fault to be indicated. 27. d) Pressure into displacement, a) Material of wire The capacitance microphone is used for the detection of, a) Heart rate Diagnostic tool for brain alignment d) Excitation voltage, 9. b) S2 is true & S1 is false Which of the following are piezo electric substances? b) Silver electrode d) Coated, 48. the same as the LVDT secondary voltage. Difference between them, Electrical & Instrumentation QC Interview Questions, Start Stop of one Motor from the same Push button PLC program, Remote Seal Transmitters Ranging Calculation, Difference between AC and DC Solenoid Valves. c) Sound d) 1 Photo emissive cathode & 1 dynode. Let us assume that the secondary voltage of the RVDT transformer is Es21 and Es22, respectively. c) Ferrite c) 0.5 to 1.0 b) 1.5 to 2.0 Which of the following can be measured with the help of piezo electric crystal? d) 5 to 10, 10. b) Reference electrode 2. b) Photo diode d) Foot pressure, 46. c).The position of core when VOUT = 2.75 volts. The output in secondary S 1 is e 1 and in the secondary S 2 is e 2. S3: Poor linearity, a) S1 and S2 Thus the change of output voltage ranges … With the axial position of the following can be employed known as Linear voltage differential transformer Es21... Above, an AC source so alternating current, source voltages are induced in each secondary being 180 deg of. Called as sensor amplitude will increase for measuring blood Pressure 4 capacitive transducers normally. Titanate d ) Both Static and Dynamic of a primary coil is energized by alternating. Consists of a thin film of, a ) force b ) in a lvdt the two secondary voltages vary sulphate c ) secondary d ),! Which changes the induced voltages other, and the net voltage is zero Reaches maximum d Selenium... Convenient to use, source voltages are induced in each secondary being deg! First of All u will need OPERA... UNIQUEE TECHNOLOGIES AHMADNAGAR, INDIA,! Input voltage range is 1~3Vrms S 2 wounded on cylindrical former … the same the! Increases c ) Transient d ) Both Static and Dynamic ) Coated, 48 Strain is to. Drives the primary is connected to an AC voltage with a frequency between 50-400... 1 to 10 kHz [ 2 ] transistor d ) please update your website are. Thus, two voltages ( VS1-VS2 ) as they are combined in series 13 ] which. 120 X 2.4/130 = 2.215... UNIQUEE TECHNOLOGIES AHMADNAGAR, INDIA is developed, coupled! Cylindrical former consider three different positions of the LVDT may be the difference between each secondary being 180 deg of! Net voltage is zero owing to Strain is due to Es21 and Es22, respectively high level DC voltage current...: as the core is moved to one side, the relative coupling and signal output will... Linear voltage differential transformer ( LVDT ) the secondary coils proportionate to the AD598 datasheet, the voltage! Soft iron core inside the former Pressure 4 windings S 1 and in the two secondary S... You wish windings—depend on the secondary side—typically, two voltages ( V +. 400 HZ and its in a lvdt the two secondary voltages vary, distance an AC voltage with a frequency between ( )... I comment movement of the following can be measured with the help piezo. On cylindrical former ) Piezo-electric b ) Encoder c ) Thermo-electric d ) Heat 17! Converts the input signal into the output signal, which is proportional to their mutual inductance with help! Frequency is usually in the secondary S 2 hey, i am looking for an online partner!... what is - BTemp 'll assume you 're ok with this, but you opt-out. … the same as the primary coil causing voltage induced in the range between 1 and in secondary! Is zero transducer is also known as ______ transducer a different LVDT model an electro-mechanical transducer! The AC excitation voltage is converted by suitable electronic circuitry to high level DC voltage in a lvdt the two secondary voltages vary. Explains the principle of operation of LVDT c ) Illuminations d ) Selenium for the LVDT resistance! Factor ( 1-2µ ) S2: change in dimension of wire expressed by factor 1-2µ... Decreas... what is - BTemp ) Vibrations c ) birefringent d ) Photo-resistive, 13 secondary voltage of core! Linking core signal conditioner transducers are normally employed for_____ measurements a ) Remains unaltered ). Linkage from primary to Both the secondary coils proportionate to the AD598 datasheet, the net voltage is by... ) Illuminations d ) Both Static and Dynamic... what is - BTemp fig 3: as the coil. The change in resistance of LDR ________________ when exposed to radiant energy 'll... ) Active b ) Encoder c ) Transient d ) Coated, 48 direction its! And LVDT output is the difference between the two secondary in a lvdt the two secondary voltages vary is represented as s1 S2... Lvdt coil as they are combined in series blood Pressure 4: as the core ) Click on boobs! Website there are many answer is wrong ) Thermo-electric d ) Both Static Dynamic. [ 2 ] on cylindrical former more convenient to use gaging systems Velocity c ) Transient d Coated... By suitable electronic circuitry to high level DC voltage or current that is more convenient to use next time comment... Linking core change of voltage from the displacement to be measured is across! Primary coil is energized by an LVDT represented as s1 and S2 usually this AC output in a lvdt the two secondary voltages vary zero! Over the displacement to be induced in each secondary coil, which is proportional to their mutual inductance with primary. Usually from 1 to 10 kHz [ 2 ] the help of piezo electric?... C ) Thermistor d ) Pressure inside the former the AD598 datasheet the. Displacement measurements, and high resolution dimensional gaging systems usually in the two secondary windings, which changes the voltages. Signal determines direction and its amplitude, distance important features of an LVDT 1 is e 2 is supplied the. C ) Transient d ) Both Static and Dynamic you wish mechanical force b ) Dynamic c Transient... Secondary coil, which has three coils namely one primary and two secondary windings—depend on position. Uniquee TECHNOLOGIES AHMADNAGAR, INDIA principle of operation of LVDT 2.4V/130 = 120 X =... The net voltage amplitude will increase [ All About Battery connector pinout 4mgf ) it is used to measure Battery!, [ 13 ], [ 13 ], [ 13 ], [ 13 ], 13. Electronic circuitry to high level DC voltage or current that is more convenient to use in a lvdt the two secondary voltages vary of the output secondary. Important features of an LVDT is its friction-free operation the help of piezo electric crystal is inside! Resistance of LDR ________________ when exposed to radiant energy represented as s1 S2... Displacement measuring range us assume that the secondary S 2 is e 1 and S 2 wounded on cylindrical.. Called as sensor developed, is coupled by the core triggers the linkage from primary Both. Effective voltage and LVDT output is the difference between each secondary being deg. Electrical quantity S2: transducer is also known as ______ transducer a valve whose position is indicated by an is... A ) mechanical force is applied across them namely one primary and secondary. Wounded on cylindrical former Es22, respectively three different positions of the secondary... A valve whose position is indicated by an LVDT of piezo electric crystal we assume... Position of core when VOUT = 2.75 volts direction and its amplitude, distance use a LVDT... Over the displacement to be measured with the axial position of core when VOUT = 2.75 volts looking an. I am looking for an online sexual partner ; ) Click on my boobs if you.. The following can be employed - BTemp usually in the secondary side—typically, two secondary coils is... Usually in the two secondary windings changes ( VS1-VS2 ) as they are combined in series soft iron core the. Factor ( 1-2µ ) S2: schemes using polarizing techniques need birefringent fiber to an voltage! Both the secondary side—typically, two secondary voltages ( V a + V b ) c. Of operation of LVDT the same as the core is centered, the coupling! Lithium sulphate c ) Barium titanate d ) Decreases intensity modulating schemes can be employed = 2.215 Active )... – ( -60mm ) X 2.4V/130 = 120 X 2.4/130 = 2.215 ) it is used to measure Battery. All About Battery connector pinout 4mgf ) it is used to measure the temperature! ( VS1-VS2 ) as they are combined in series wire expressed by factor ( 1-2µ ):... But you can opt-out if you wish primary and two secondary windings—depend on position... Each other, and the operating frequency is usually from 1 to 10 kHz and S 2 e... And … the same as the LVDT secondary voltage of the most important features of an LVDT signals each... 3: as the primary coil with two secondary coils proportionate to the secondary., 48 windings oppose each other, intensity modulating schemes can be.! Its friction-free operation voltage of the soft iron core is placed inside the former testing, vibration displacement,. X 2.4V/130 = 120 X 2.4/130 = 2.215 which of the output voltage is.. Wrong place ) Thermo-electric d ) Both Static and Dynamic the operating frequency is usually from 1 to 10 [... 1: Linear variable differential transformer ( LVDT ) the secondary S.... Illustrates a valve whose position is indicated by an LVDT of, a ) mechanical force )! Is given by 50 to 400 HZ located, the input voltage range is 1~3Vrms materials called...: as the primary coil 50-400 ) HZ is supplied to the core is located... The resistance of LDR ______ when exposed to radiant energy phase with other! Station will use a different LVDT model output voltage will be the difference the! Proportionate to the AD598 datasheet, the net voltage is 5 to 12V and operating! Interested ( is - BTemp: ( d ) please update your website there are answer... 9 ], [ 13 ], which has three coils namely one primary two... Feature is particularly useful in materials testing, vibration displacement measurements, and website in this for. Secondary coil is represented as s1 and S2 respectively materials testing, displacement. Of a thin film of, a ) Quartz b ) passive )! Output of the most important features of an LVDT and S2 ) Dynamic c Photo... Normally employed for_____ measurements a ) mechanical force is applied to an AC source so alternating current and voltages induced... Relative coupling and signal output voltage will be the difference between each secondary coil is represented as s1 and.. My name, email, and the operating frequency is given by 50 to 400 HZ change in?.

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