Answer Posted / aftab ahmed mazari
Differential pressure switch has two sensing ports. Hi and
Lo, Suppose set point of differential pressure switch is
30 PSI. Connect the pressure source at hi side of switch.
Leave Lo side (No any connection or any supply to low side)
Connect multimeter at switch terminals. Apply pressure at
high side. When pressure will reach 30 PSI, Switch will
operate and will change its contacts and also will be
indication at meter.
Suppose switch Low side is faulty, then apply 30 PSI at
High side and also apply low side pressure (5 to 10 PSI),
switch contacts should change, which indicate switch is
working.
aftabmazari@yahoo.com
| Is This Answer Correct ? | 21 Yes | 2 No |
Post New Answer View All Answers
How to calibrate H2s Dectector
what is sil (safety integrity level
Linear amplifier.
What are the type of bonnets in the control valves?
How to work temperature gauge?
Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...
i want to find out iffco get test paper
Which is your favourite subject & explain any one topic of it.
can anyone tell me about the basic concepts to consider before to start a PLC panel wiring
What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?
Why not come out analog output in ABB EL3020 when display show correct value
what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?
How signals can be taken through modbus?
Explain Gas Turbine startup and shutdown sequences
describe flow nozzel principle?
