Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / suresh m (fcri)
In most pressure switches, the set-point is adjustable.
During calibration, pressure is applied slowly near the set-
point, and usually a continuous reading Reference sensor
(or a calibrated dial-gauge)is used. During increasing
pressure, when set-point is reached (or crossed), if the
switch does not show contact change, then the knob (or
spring / bolt) is adjusted for correct action.
The test is repeated to confirm the switching of contacts
at desired pressure.
The pressure is raised slowly to a value above the set-
point during the test even as we observe switch-over
pressure. Later the switch change-over back to initial
state is also confirmed as we lower the pressure below the
set-point pressure.
| Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
What are different types of valves?
How to work temperature gauge?
dear friends, i have seen flow as the selection critriea in presure guage (bourdon tube) and i would like to know what is the relation between flow and performance of pressure guage other parameters i found in the data sheet are pressure max. 1ksc temperature max. - 50 deg c line size - 80NB operating range - 1ksc pr. guage range - 0-2 ksc thank u,
the 3 most common transmitter protocol being in refinery or qatar gas and aramco.
What inherent design and operating principles are included in a modern control system to use predictive maintenance practices to increase overall system reliability?
How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks
What is Erosion in a control valve?
Draw bode plot of any transfer function. Why is plotting bode necessary?
Which is the best field foundation bus. ( FF ) Yokogawa, Honeywell or others ?
Linear amplifier.
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 MUX JB's are using only Temperature Element in Fundation field bus?
what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.
Why trim span ? How?
If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?
