Explain The Working Of An Electronic Level Troll?

1 Answer

Answer :

The variation in level of buoyancy resulting from a change in liquid level varies the net weight of the displacer increasing or decreasing the load on the torque arm. This change is directly proportional to change in level and specific gravity of the liquid. The resulting torque tube movement varies the angular motion of the rotor in RVDT providing a rotor change proportional to the rotor displacement, which is converted and amplified to a D.C. current.

Related questions

Description : Explain The Working Of An Enraf Level Gauge?

Last Answer : Enraf level gauge is based on the ser powered null balance technique. A displacer serves as continuous level sensing element. A two phase ser motor controlled by a capacitive balance system winds unwinds ... by the moving central sensing rod provided by the two capacitor plates and the si plates.

Description : Explain The Working Of Rotameter?

Last Answer : Variable area meters are special form of head meters. Where in the area of flow restrictor is varied. So as to hold the differential pressure constant. The rota meter consists of a vertical tapered tube ... is maintained constant. The position of the float' is the measure of the rate of flow.

Description : What Is The Working Principle Of The Magnetic Meter?

Last Answer : An electric potential is developed when a conductor is moved across the magnetic field. In most electrical machinery the conductor is a wire. The principle is equally applicable to a moving ... conducting liquids. The magnetic meter is particularly suited to measurement of slurries and dirty fluids.

Description : Explain Ratio Control System?

Last Answer : A ratio control system is characterized by the fact that variations in the secondary variable don't reflect back on the primary variable. A ratio control system is the system where secondary flow is hold in some proportion ... : KA-B=0 or B/A = K where K' is the ratio setting off the relay.

Description : Explain The Mechanism Behind The Turbine Meter?

Last Answer : Turbine meters consist of straight flow tube within which a turbine or fan is free to rotate about it s axis which is fixed along g the centre line of the tube. Mostly, a magnetic pick up ... in the form of electric pulses from the magnetic pick up with a frequency proportional to the flow rate.

Description : Explain The Burnout Feature?

Last Answer : Burnout provides the warnsug feature of driving indicator at the end of scale, if the input circuit is open. A burnout resistor is provided which develops a voltage drop between the measuring circuit and ... circuit in the input. Upscale burnout: R value 10 M Downscale burnout: R value 22 M

Description : Name Different Parts Of A Pressure Gauge. Explain The Use Of Hair Spring In The Pressure Gauge?

Last Answer : Pressure gauge includes following components: 1. ‘C’ type bourdon tube. 2. Connecting link 3. Sector gear 4. Pinion Gear 5. Hair spring 6. Pointer 7. Dial Use of hair spring: Hair spring is responsible for controlling torque. It is also used to eliminate any play into linkages..

Description : Explain Bernoulli’s Theorem. State Its Application?

Last Answer : Bernoulli's theorem states that the total energy of a liquid flowing from one point to another remains constant'. It is applicable for non-compressible liquids. For different types of liquid flow ... indicator. It can also be used to low pressure in the venturi tubes present in carburetor.

Description : Do You Know The Working Of An Electronic Level Troll?

Last Answer : The variation in level of buoyancy resulting from a change in liquid level varies the net weight of the displacer increasing or decreasing the load on the torque arm. This change is directly ... change proportional to the rotor displacement, which is converted and amplified to a D.C. current.

Description : What Is Solenoid Valve? Where It Is Used?

Last Answer : A solenoid is electrically operated valve. It consists of solenoid coil in which magnetic plunger moves. This plunger is connected to the plug and tends to open or close the valve. There are two ... . Normally Open 2. Normally closed Use: It is used for safety purpose in different electric work.

Description : How Will You Test A Transistor With A Multimeter?

Last Answer : 1. Emitter +ve of meter and base -ve output =Low resistance 2. Emitter -ve of meter and base +ve output =High resistance 3. Collector +ve and base -ve output =Low 4. Collector -ve and base +ve output =Low Emitter: Collector = High resistance PNP: Opposite Results

Description : What Is Motion Balance Principle?

Last Answer : A controller which generates an output signal by motion of its parts. The increase in the baffle is to move towards the nozzle. The nozzle back pressure will increase. This increase in the back ... moved upward due to this. The nozzle will move until motion almost equals the input baffle motion.

Description : What Is Force Balance Principle? State Some Of Its’ Advantages?

Last Answer : Force balance principle: A controller which generates an output signal by opposing torque. The input force is applied on the input bellows which moves the beam. This crackles nozzle back pressure. The ... 1. Moving parts are fewer. 2. Baffle movement is negligible 3. Frictional losses are less

Description : What Is Zener Diode? What Is Voltage Regulator?

Last Answer : The breakdown region of a p-n diode can be made very sharp and almost vertical diodes with almost vertical breakdown region are known a s zener diodes. A zener diode operating in the ... . Voltage regulator: The output remains constant despite changes in the input voltage due to zener effect.

Description : Hat Is Zener Diode? What Is Voltage Regulator?

Last Answer : The breakdown region of a p-n diode can be made very sharp and almost vertical diodes with almost vertical breakdown region are known a s zener diodes. A zener diode operating in the breakdown ... . It is this constant voltage that has made the zener diode an important device in voltage regulation.

Description : What Is Intrinsically Safe System?

Last Answer : Intrinsic safety is a technique for designing electrical equipment for safe use in locations made hazardous by the presence of flammable gas or vapours in the air. Intrinsically safe circuit is one ... causing ignition of a specified gas or vapour in air mixture at the most ignited concentration.

Description : What Is Furnace Draft Control?

Last Answer : Balanced draft boilers are generally used negative furnace pressure. When both forced draft and induced draft are used together, at some point in the system the pressure will be same as that of ... desirable condition is that the one have a very slight negative pressure of the top of furnace.

Description : What Are Different Types Of Control Valves?

Last Answer : The commonly used control valves can be defined as follows: a. Depending on Action: Depending on action there are two types of control valves 1. Air to open 2. Air to close b. Depending on body ... valves 1. Globe valves single or double seated 2. Angle valves 3. Butterfly valves 4. Three way valves

Description : Name Different Types Of Bourdon Tubes?

Last Answer : Types of bourdon tubes: 1. C type 2. Spiral 3. Helix

Description : What Are Primary Elements Of Measuring Pressure? Which Type Of Pressure Can Be Measured By These Elements?

Last Answer : Primary elements of measuring pressure are: 1. Bourdon Tube 2. Diaphragm 3. Capsule 4. Bellows 5. Pressure springs These elements are known as elastic deformation pressure elements.

Description : What Is The Use Of Valve Positioner?

Last Answer : Valve positioner can be used for following reasons: 1. Quick action 2. Valve hysteresis 3. Viscous liquids 4. Split range. 5. Line pressure changes on valve 6. Bench set not standard 7. Reverse valve operations

Description : What Is The Use Of Double Seated Valve?

Last Answer : In double seated valves the upward and downward forces on the plug due to reduction of fluid pressure are nearly equalized. It is generally used on bigger size valves and high pressure systems. Actuator forces required are less.

Description : What Is The Use Of Single Seated Valve?

Last Answer : The single seated valve is used on smaller sizes where an absolute shut off is required. The use of single seated valve is limited by pressure drop across the valve in the closed or almost closed position.

Description : How Would You Choose Differential Range?

Last Answer : The most common range for differential range for liquid measurement is 0-100. This range is high enough to minimize the errors caused by unequal heads in the seal chambers. It is also dependent on the ... to 400. While decrease down up to 20 by merely changing the range tubes or range adjustments.

Description : What Are De-saturators?

Last Answer : When, in some processes, e.g. batch processes, long transient responses are expected during which a sustained deviation is present the controller integral action continuously drives the output to a minimum or ... of the control unit'. When this condition is met, then this unit is de-saturated.

Description : How Is Automatic Reference Junction Compensation Carried Out In Temperature Recorders?

Last Answer : In automatic reference junction compensation, variable nickel resistor is used. As the temperature changes, so does its resistance. This reference junction compensator is located, so that it will be ... the thermocouple is rejoined. This joint is invariably at the terminal strip of the instrument.

Description : Why Thermowells Are Used? What Materials Are Used In Thermo Wells?

Last Answer : In numerous applications, it is neither desirable nor practical to expose a temperature sensor directly to a material. Wells are therefore used to protect against damage corrosion, arosion, ... operations. Materials used in thermowells: Stainless steel, Inconel, Monel, Alloy Steel, Hastelloy

Description : What Is The Constant Voltage Unit?

Last Answer : The constant voltage circuit consists of a rectifier, CR and a filter capacitor. It is followed by two stages of zener regulation. Abridge configuration is provided to lamp line voltage ... provides relatively provide constant current. Resistors form a bridge that may remoment line voltage effects.

Description : How D.p. Transmitter Can Be Applied To Open Tank?

Last Answer : In open tank the lower pressure side is vented to the atmosphere. All pressure is applied to the high pressure side. This vessel pressure is measured through high pressure side.

Description : How D.p. Transmitter Can Be Applied To Close Tank?

Last Answer : In closed tank, bottom of the tank is connected to the high pressure side of the transmitter. Top of tank is connected to the lower pressure side of the transmitter. In this way vessel pressure can be measured.

Description : How Is Flow Measured In Square Root?

Last Answer : Flow varies directly as the square root of pressure. Thus, F=K of square root of applied pressure. Since this flow varies as the square root of differential pressure. The pressure pen does not directly ... reads 50% of the chart. So, flow can be calculated using the pen measure in the chart.

Description : How Can A D.p. Transmitter Be Calibrated?

Last Answer : D.P. transmitter can be calibrated using following steps: 1. Adjust zero of Transmitter. 2. Perform static pressure test: Give equal pressure on both sides of transmitter. Zero should not ... Apply required pressure to the high pressure side and adjust the span. Adjust zero gain if necessary.

Description : Why Is The Orifice Tab Provided?

Last Answer : Following reasons justify for providing orifice tab: 1. Indication of orifice plate in a line 2. The orifice diameter is marked on it. 3. The material of the orifice plate. 4. The tag number of the orifice plate. 5. To mark the inlet of an orifice.

Description : How Do You Identify An Orifice In The Pipeline?

Last Answer : An orifice tab is welded on the orifice plate which extends out of the line giving an indication of the orifice plate.

Description : What Are Different Types Of Orifice Plates? State Their Uses?

Last Answer : Different orifice plates are: 1. Concentric 2. Segmental 3. Eccentric Concentric: These plates are used for ideal liquid as well as gases and steam service. Concentric holes are present in these ... This plate has the eccentric holes. This plate is used in viscous and sherry flow measurement.

Description : When was the first time you encountered, or discovered an internet troll?

Last Answer : On AnswerBag, in 2009, most likely. Only the nice people can answer. Might have been my first experience with a troll.

Description : Would you like to troll your girlfriend/boyfriend to see if they'd like cheating on you?

Last Answer : Maybe, if not, you could tell me your (not necessarily actual) reaction of finding out.

Description : When an OP is found out to be a troll, does an otherwise good question just disappear?

Last Answer : Edited to add: I need an example of a troll or “troll” question that also happens to be a good one. I find it’s subjective sometimes.

Description : How do you personally deal with troll attacks on ask-public?

Last Answer : answer:I have not seen any actual trolling on ask-public in a very long time. Well, arguably, I can be a bit of a troll from time to time, but I'm also a legit user of the site, so I'm ... I would reverse-troll the troll, and annoy them until they left on their own accord. It's more fun that way.

Description : What is the difference between a "troll" and a "contrarian"?

Last Answer : One disagrees with you the troll deliberately pisses you off.

Description : (Stupid question) If we can flag spam threads, can we flag troll threads?

Last Answer : answer:Flag as “something else” or “isn’t really a question.” Explain in comment box. See PM.

Description : If we have the quote: "Don't feed the troll" then do we have the quote: "Don't feed the spam"?

Last Answer : I’d say “don’t taste the spam.” Spammers want you to bite!

Description : Does this mean Arizona will be a "No Troll Zone"?

Last Answer : answer:You’ve got to hand it to them for working so hard on their reputation of abandoning liberty at every given opportunity. Unless you’re a gun owner – and then they can’t expand your liberties fast enough.

Description : Why do people troll?

Last Answer : They need the attention to validate themselves.

Description : What would your troll name be?

Last Answer : Ramalama Ding-Dong – - just sayin’

Description : I'm in a chatroom and some troll is screaming about how he can send a virus to peoples computers from the chatroom itself. Is that even possible?

Last Answer : No. It’s not possible. He has no direct access to your computer. Just don’t click on any links he posts.

Description : I'm looking for a poem by Jack Prelutsky from the book Monday's Troll. Does anyone know it?

Last Answer : “every inch of his was covered with a greasy mat of hair”

Description : Why do folks play into the whole "troll" game?

Last Answer : didn’t we just have a troll thread?

Description : Do you find that there has been more 'troll-like' questions on here, lately?

Last Answer : I have an idea of what “troll-like” means, but before I answer, please clarify.

Description : Reddit users: do you know of a way to block a troll on there?

Last Answer : Have you tried asking their support team? Or e-mailing them?