WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL?
INSTEAD OF 4-20mA.
- 6 Answers
- 12067 Views
- Hindustan Unilever Limited, Yashmun Engineers, I also Faced
- E-Mail Answers
Answer Posted / lalatendu keshari prusty
4-20ma signals will travel along distance without dropping signal value and the internal circuit distinguish between connection break & minimum value.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling
why would you like to join our company
What are different types of valves?
Name different parts of a pressure gauge. Explain the use of hair spring in the pressure gauge.
all types of liquid analyzer principle with drawing?
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 =
how to tune siemens sipart electro pneumatic positioner..plz tel me..
Any body have know try work calculation ???
Exothermic reaction./ endothermic reaction
basic connection and principle of axial shift sensor n differential sensors in tubine describes n draw......
How d.p. Transmitter can be applied to close tank?
we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.
what is the advantage of submersible level transmitter compare to ultrasonic level transmitter?
need instrumentation job completed 1 year trainee ship in mnc pesticide company. now in search of job
field bus transmitter calibration procedure tell me
