4-20Ma To 0-10V Converter Circuit

Top Instrumentation Interview Questions and Answers. Explain what is instrumentation What is instrumentation The technology which is used to measured and control the process system of plant is called instrumentation. It is branch of engineering. What is renylods numberWe know with help of renylods number what type of flow in fluid. Why do we use 4 2. To elevate zero so that we can come to know whether it is dead zero or from signal. Instrument theory ques answers. ALL INSTRUMENTATION6. What is the difference between dry leg and wet leg Dry leg means in lab. And wet leg means in feild. How can we clibrate a positioner A positioner is a device put into a valve to ensure that it is at a correct position of opening as per the control signal. Ma To 0-10V Converter Circuit' title='4-20Ma To 0-10V Converter Circuit' />China Converter manufacturers Select 2017 high quality Converter products in best price from certified Chinese Frequency Inverter manufacturers, Network Product. Ma To 0-10V Converter Circuit' title='4-20Ma To 0-10V Converter Circuit' />An IP converter only sends the openingclosing request to valve but can not confirm its position. Positioner senses the valve opening through a position feedback link connected to valve stem which is its input signal. IP converter output is its setpoint input. KKRne.png' alt='4-20Ma To 0-10V Converter Circuit' title='4-20Ma To 0-10V Converter Circuit' />UK based distributors and stockists of Tyco automotive and electromechanical relays Saia Burgess microswitches and pushbuttons and Crouzet switches. Explain what is instrumentation is a collective term for measuring instruments used for indicating, measuring and recording physical quantities. Technical Data PowerFlex 520Series AC Drive Specifications Original Instructions Drive Features AppView, CustomView, QuickView, and MainsFree. The difference between these two is the error signal based on which the positioner positions the valve to correct position to reduce error to zero. Hence positioner is nothing but a pneumatic feedback controller. Controlled external supply air to positioner provides power to positioner to position a valve. INPUT OUTPUT MODULES RaiseLower Conversion Modules Pulse Width to Analogue Converter Module AXPTAMPTA. Features Converts andor isolates a PWM or pulse signal. Also positioner is used in a valve when valve operating signal range is different from IP converter output range. Explain What is the working principle of the magnetic meter 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, electrically conductive liquid. The primary device of commercial magnetic meters consist of straight cylindrical electrically insulated tube with a pair of electrodes nearly flush with the tube walls and located at opposite end of a tube diameter. This device is limited to electrically conducting liquids. The magnetic meter is particularly suited to measurement of slurries and dirty fluids. Tell me the mechanism behind the turbine meter 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 system senses the rotation of the rotor through the tube walls. The turbine meter is a flow rate device, since the rotor speed is directly proportional to the flow rate. The output is usually in the form of electric pulses from the magnetic pick up with a frequency proportional to the flow rate. How to choose differential range The most common range for differential range for liquid measurement is 0 1. This range is high enough to minimize the errors caused by unequal heads in the seal chambers. It is also dependent on the differences in the temperature of the load lines. The 1. 00 range permits an increased in capacity up to 4. While decrease down up to 2. Download Interview PDF 1. What is the working of Rota meter 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 through which the metered fluid flows in upward direction. As the flow varies the float rises or falls to vary the area of the passages that the differential across it balances the gravitational force on the float. The differential pressure is maintained constant. The position of the float is the measure of the rate of flow. Explain What are de saturators When, in some processes, e. This phenomenon is called integral saturation of the control unit. When this condition is met, then this unit is de saturated. Do you know How is automatic reference junction compensation carried out in temperature recorders 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 at the temperature of the reference junction. The reference junction is at the poset where the dissimilar wire of the thermocouple is rejoined. This joint is invariably at the terminal strip of the instrument. What is solenoid valve Where it is used 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 types of solenoid valves 1. Normally Open. 2. Normally closed. Use It is used for safety purpose in different electric work. What is ratio control system A ratio control system is characterized by the fact that variations in the secondary variable dont reflect back on the primary variable. A ratio control system is the system where secondary flow is hold in some proportion to a primary uncontrollable flow. If we assume that the output of a primary transmitter is A. B, and that the multiplication factor of the ratio relay is K, then for equilibrium conditions which means set valve is equal to measured valve, we find the following relation KA B0 or BA K where K is the ratio setting off the relay. How to test a transistor with a multimeter Emitter ve of meter and base ve output Low resistance. Emitter ve of meter and base ve output High resistance. Collector ve and base ve output Low. Collector ve and base ve output Low. Emitter Collector High resistance. PNP Opposite Results. What is motion balance principleA 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 pressure acting on the balancing bellows, will expand the bellows. The nozzle is moved upward due to this. The nozzle will move until motion almost equals the input baffle motion. What is force balance principle State some of its advantages 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 nozzle back pressure is sensed by the balancing bellows which brings the beam to balance. The baffle movement is very less about 0. Advantages a. Moving parts are fewer. Baffle movement is negligiblec. Frictional losses are less. What is zener diode What is voltage regulatorThe 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. Teamviewer 9 Full Version here. A zener diode operating in the breakdown region is equivalent to a battery. Because of this current through zener diode can change but the voltage remains constant. It is this constant voltage that has made the zener diode an important device in voltage regulation. Voltage regulator The output remains constant despite changes in the input voltage due to zener effect. What is intrinsically safe system 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 in which any spark or thermal effect produce either normally or under specified fault conditions is incapable of causing ignition of a specified gas or vapour in air mixture at the most ignited concentration. What is furnace draft control Balanced draft boilers are generally used negative furnace pressure.