Mass flow rate of liquid is an important parameter to be measured and controlled in a process industry. In the present paper, the design of a PC based mass flow indicator has been studied using a well known temperature sensing IC AD590. The temperature sensing IC AD590 has been used as a flow sensing element and the effect of fluid temperature has been eliminated by using four identical IC units. Four IC units are connected in the differential mode. The output of the differential circuit is send to optoisolator circuit through a signal conditioner circuit. The output of the optoisolator circuit has been displayed in a PC monitor using Labtech Note Book Pro software. A theoretical equation relating the output of this circuit with flow rate …show more content…
In this technique the anemometer effect i.e. cooling effect of flowing fluid on the heat sink metallic surface of a temperature sensing IC unit like AD590 is utilized to measure the mass flow rate of the fluid. In order to compensate the temperature effect of the fluid, four identical IC units are used and mounted in the same diametrical plane along two perpendicular diametrical directions. The flow tube is mounted in the horizontal position in such a way that it is always filled up with flowing fluid. Four identical temperature sensing units (AD590) are mounted at equidistance apart in the same diametrical plane of the flow tube, of which two sensing IC's are mounted along a horizontal diameter and the other two IC's are mounted along the vertical diameter in the same plane. As a result the cooling effect of the fluid on the IC's along horizontal diametrical positions may be assumed to be different from that on the IC's along vertical diametrical position. All the IC units are supplied from the same stabilized 5 Volts dc source so that their heat supply rate is identical. The output of each IC is a current signal passing through a load resistance and is not dependent on the value of load resistance up to a certain limiting value. The dc voltage developed across each load resistance has been found to be related with fluid flow rate. Sum of the voltage signals developed for two horizontal IC's has been subtracted from that of the voltage signals for two vertical IC's. As a result the effect of temperature of the fluid is nullified and the resultant after this subtraction may be assumed to be a function of fluid flow rate only. The dc voltage developed in the differential op amp is of the order of mV signal. This signal is converted into 1-5 volt signal using instrumentation amplifier and signal conditioning circuit. This 1-5 volts signal is send
The output frequency of divider gets divided by 4 ie 1.05 GHz. Since for practical realization, one cannot directly give RF signal directly to frequency divider input pin to avoid huge impedance mismatch. Use of microstrip line[4] in the ter- mination allows for smooth transition of signal from SMA probe to Microstrip and further 27 Figure 4.10: Divided output of divide-by-4 ip op to frequency divider pin. The schematic of divide-by-4 with microstrip is shown below in Figure 4.11.
Equipment list: 1. Agilent 54621A oscilloscope 2. Agilent 33120 Function Generator 3. Capacitors 4.
Experiment 7 In this experiment we configured several DC circuits consisting of an emf and a network of resistors. The circuits were composed of a power supply, two DMMs, a circuit board, an SPST switch, and an assortment of known resistors along with one unknown resistor. We measured the current and voltage of the entire circuit as well as the potential drops across each resistor to determine the parameters of the circuit including the resistance, voltage, and current for each component.
Explain why the circuits works? It converts AC voltage to DC voltage. Current flows through the diode in one direction, showing only the positive half-wave on the oscilloscope. The negative half-wave is suppressed, while the positive half-wave appears across the load.
5. How will you operationalize your DV? What will you use to measure whether the outcome was different for your IV groups? I will operationalize the Dependent variable by observing their actions during the experiment. 6.
“I hated Martin more than others,because of his belly” Nick Vaca says in his story, Martin, which is about how the author reenacts the memory with visual language and specific word choices to give a picture on what he has a lasting impression on, which is an encounter with a boy named Martin. It became evident that the narrator, seemed to remember the scene perfectly, which shows how he still remembers it, which might indicate some sort of mark or impression left after experiencing the encounter. Near the end of the book, Nick might of seen that he had the wrong idea about Martin, which could of let his past experience affect his eyes metaphorically on Martin. Nick starts off the story with the first details, but more importantly, shows his point of view. Before he has his first interaction with the name Martin, he might of already have a point of view on where he lives, as it was not very wealthy.
Many religions use water to purify and cleanse. In the Catholic religion, priests use water to baptize. In the Hindu religion, people use it to cleanse themselves before prayer. Water is often viewed as holy and sacred by these and many other religions, and is commonly associated with life and purity. However, Rudolfo Anaya in his book, Bless Me, Ultima, takes a completely different turn on this commonly used symbol.
Infer why the current that was created during this lab is called a convection current. Convection is the movement caused within a fluid when hotter, less dense water, moves upward, and colder, denser water, moves downward. I infer that the current that was created during this lab is called a convection current because the colder, denser water, moved beneath the hot water, causing the hot water to move upward. 4. How does this experiment demonstrate water density?
Colin Turner Professor Kuykendall CHE 102 10 February 2017 Title: Experiment 2: Determining The Molar Mass of a Volatile Liquid Introduction: In this lab experiment, the ideal gas law will be used to find the average molecular mass of the unknown liquid as a gas. This will be done by heating the liquid until it is in its gaseous state and then once it is there it will be determined what the average molecular mass is.
Focus the eyepieces to adjust your view. 3. Adjust the illumination to an appropriate level by adjusting the iris diaphragm and the condenser. The light should appear on the side directly below the objective lens, and give an even amount of illumination. 4.
IMPLEMENTATION ISSUES In this section, the following issues that were found, when integrating the components that were used complete the experiments. These were discussed in chapter 5. The three circuits were built from existing configurations. The circuits that were built upon the chosen configuration were the following: an analog laser driver circuit,
The documentary "Trouble the Water" is filled with stories and different accounts of the aftermath of hurricane Katrina. The film begins by introducing Kimberly Roberts and her husband. They are the main characters of this film. The first part of the film shows the day leading up to the hurricane as shot by Mrs. Roberts home video. It focuses on the evacuation order and the people who are not able to leave for lack of transportation.
Question Do sports drinks have more electrolytes than orange juice? Variables Independent Variable: Type of Liquid Dependent Variable: The conductance of the liquid Controlled Variables: the amount of liquid, multimeter and supplies, temperature of the liquid, room, and supplies Hypothesis If I measure the conductance of each liquid, then the sports drink will have the greatest current, and the greatest amount of electrolytes. Materials Digital Multimeter
I. Introduction This experiment uses calorimetry to measure the specific heat of a metal. Calorimetry is used to observe and measure heat flow between two substances. The heat flow is measured as it travels from a higher temperature to a lower one. Specific heat is an amount of heat required to raise the temperature of one gram of anything one degree Celsius. Specific heat is calculated using several equations using the base equation: q=mc∆T II.
Background Information: In this experiment I will be investigating the impact of light intensity on the rate of water uptake, due to transpiration, by attaching a shoot from a leafy plant in the capillary tube of a potometer, and then measuring how long it takes for a bubble to move a set distance. The faster the bubble moves, the greater the rate of transpiration. I will be placing one plant in an environment where it is exposed to high-light intensities, and another plant in an environment where it is exposed to low-light intensities. Transpiration is the process of the transport of water and nutrients up the the plant from the roots to the leaves.