Answer / munty

we use negative supply bcz the vibration sensor based on PNP
TRAANSISTOR philosophy, PNP the base voltage suppose to be
nagative.

Answer / venkatesh

In -ve voltage the rate of distabance is lesser than +ve
voltege.So we using -10vdc(some time-9.7 to -9.8vdc is
acceptable ).

Answer / manish k soni

we r not using negative supply but the 0utput
is set negative and this is ony the company
monopoly

Answer / smart dude

in vibration senseor we give -24 v in proximitor becoz it
have vaild reason
and reason is that becoz we have to take o/p of proximitor
is -10 to 0
and why we have to take the voltage o/p -10 to 0 is that
becoz and the distance b/w shaft and and sensor get less rf
signal is absobed by the meatal and voltage gets
down ,,,but acc to human mind setup as gap decrease singla
amount shoukld increase (as in case of 4 to 20 ma ),so we -
ve volatage o/p becoz as -ve voltage decrease it means vale
is increasing (acc. to math -4<-3)

a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

2 Answers  

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what is difference between E/P positioner and I/P positioner. Why E/P fixed in below actuator and why I/P fixed in other place

1 Answers  

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What is the full form of PMMC ?

7 Answers   DVC,

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i have one temperature TX in my loop check time once i was remove elament temp gose maximum then i am conect corectly but still now temp showing maximum what can i do this problem?

2 Answers  

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How find CGPA? when marks are 515/850 & 2559/3350. Plz any one tell me.

1 Answers  

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Q1]IF THE RANGE FOR FLOW IS -35 TO 125 WHAT WILL BE THE SPAN FOR ABSOLUTE AND FOR NORMAL? Q2]HOW TO CALIBRATE CAPILLARY TYPE LT? Q3]HOW MANY ERROR CALCULATIONS ARE THERE USED IN PROCESS INDUSTRIES? Q4]HOW TO CALIBRATE TEMPERATURE TRANSMITTER? Q5] HOW TO CALIBRATE LEVEL TROLL AND HOW TO CONNECT? Q6]PLEASE TELL ME THE BASIC FOR INSTRUMENTATION WHICH IS APPLIED FOR CALIBRATION AND FOR ALL? PLEASE MAIL THE ANSWER TO honest_yes@yahoo.in

0 Answers   Cegelec, Honeywell,

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control modes

1 Answers   Vedanta,

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How to calibrate displacer type level transmitter (chemtrol make )for level measurement in hotwell , LP & HP heater ?

0 Answers   Matrix,

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While giving Power Supply of 24 VDC to a Transmitter,why Shield Terminal is connected either at Transmitter or at ISB.Why not Shield Terminal connected at both ends.If the Reason is to avoid Noise interference,which type of noice that is interfering.Is the Noice from the 24 VDC supply terminals or from any external source.

1 Answers  

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if I did short to both AO connections, channel will burn or what? m sure in AI it will damage to channel. But what will happens in AO?

1 Answers  

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What are securities of turbine?

1 Answers  

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While preparing the graphic diagrams trend display, 3 types of trends are prepared by Yokogawa system vender. These are for process variable, manipulated variable & set point variable. Why these 3 trends are required? Explain the purpose of these 3 trends.

1 Answers  

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