Interested to Buy Any Domain ? << Click Here >> for more details...
WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL?
INSTEAD OF 4-20mA.
- 6 Answers
- 13856 Views
- Hindustan Unilever Limited, Yashmun Engineers, I also Faced
- E-Mail Answers
Answer Posted / ali abideen ,,
Generally in a transistor some amount of voltage is
required for turning it on. This voltage is the cut in
voltage. Up to this voltage the exists a nonlinearity in
its characteristics. Beyond this cut in voltage the char.
of transistor is linear. This nonlinear region lays between
0-4ma, beyond 4ma it linear. This is why 4-20 ma range is
used.
| Is This Answer Correct ? | 29 Yes | 13 No |
Post New Answer View All Answers
What is the principle of capacitance type level transmitter?
you are on site,the plant trips,you are approached by operations,what do you do?
In turbine what does term CDP, NI, NH, HSSOC means.
which type of filter gives the constant phase characteristics?
Why rdt and thermocouple both give different output .and one things more, how to generate ohm or mili volt plz mail me merajalam143545@yahoo.com
I will attend an interview with GasGas company for a position of Instrument Technician ( Offshore )in next month can anyone tell me what questions they will ask. Thanks in advance.
1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?
Why upper weighing limit of electronics balance is 90% of the total weighing capacity?
HOW CREATED LP & HP PRESURES IN DRUM FOR DRUM LEVEL MEASUREMENT!
how to calibrate mass flow meter (Coriolis)? Example calibration range: 0 to 2500 kg/hr line size 3" fluid: Etheline glycol (MEG)
(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.
while am calibrating Drager polytron 2IR flame gas detector occured non zero status.how can i get zero status?
can you provide me full detail about instrumentation in ONGC??
Why are the uses 24vdc in industries
Specify for Cables - Flame Retardant and Fire Resistant?
