what is the way of measuring air flow in air duct?explaim
instruments used and DP creation in line?
- 3 Answers
- 5324 Views
- I also Faced
- E-Mail Answers
Answer Posted / sahebrao
For the flow measurement in duct we use the hot wire anemometer.we use constant temperature or constant current flow type of anemometer.
Dp creation is simply down by placing restriction in flow path.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw
What is hp & mp seperator .& what is its working principle ?
what is the advantage of submersible level transmitter compare to ultrasonic level transmitter?
WHAT IS TMXT IN TEMPERATURE FOUNDATION FIELDBUS.
How to convert mmWc(mili meter water colam) to tph(ton per hour)?
Explain operation of Haskel pump.
Explain working principle of lvdt?
What are the error values can accepted in flow transmitter calibration?could u give any formula for this?
Introduce yourself which is not present in your biodata?
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.
hii my name is sujith...i am preparing for HPVL GET 2010... so ,,,pls help me by send any previous questions or material to my site.....(Msujith_12@in.com) thank q
Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =
what is interface level measurement.who can calibrate interface level measurement transmitter online
What is furnace draft control?
how can use ram
