Is there’s power on the bus (if so, state whether on the
signal bus, or on a separate in the following:
a) HART
b) Profibus DP
c) Profibus PA
d) DeviceNet
e) Foundation Fieldbus
Why trim span ? How?
what is pyrometer? which purpose it has to be used?
How to calculate mmwc values into tonnes?
what is difference between profibus and field bus?
How servomotor controls throttle valve of TURBINE?
What s PDS & PDMS tools ?its role in instrumentation?
In instrumentation standard we use 4 to 20ma for transmission , why cant we use 3 to 19ma ?
when we are using HART COMMUNICATOR why we are using 250 ohm resistance while using HART COMMUNICATOR.
If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?
2 Answers Gujarat Fluorochemicals Limited (GFL), Shell,
what deference between panel earth and systemearth
Describe how to use megger to measure the earth resistance and insulation resistance
What is Process portal A(PPA)?
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