Interested to Buy Any Domain ? << Click Here >> for more details...
What is the meaning of Dry contact and Wet Contact related
to to sensors?
- 5 Answers
- 39111 Views
- Emerson, Google, I also Faced
- E-Mail Answers
Answer Posted / greg gertsch
It has been my understanding; Dry contacts when open do not
transfer any voltage or currant to the load side.
wet contacts have voltage on the load side but no currant
flow. Such as when a varistor is used as a bridge allowing
line voltage to cross over to the load side which minimizes
the arcing on contact points
| Is This Answer Correct ? | 0 Yes | 7 No |
Post New Answer View All Answers
I have got a call of IOCL interview for projects having 2yrs experience. What sort of questions should I expect in the interview?
what is the input to be given in digital flow meter during the the calibration time?
Explain the working principle of lvdt?
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
please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826
how can use ram
why direct mounted pressure transmitters is always installed with DBB ( double bleed block) valve in process line or top of the tanks ?
For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?
, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.
Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?
Is there any relation between Artificial Intelligence and Instrumentation?
why I need valve guard and whats different between guard and positioner ??
In Safe Guarding test what means by "Failed to Danger" ?
hye SAM acn u send your e mail id, so that i can solve my query through e mail?
What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?
