why we use negative 24vdc to a proximeter

Question Posted / princecharlesv

4 Answers
12282 Views
KNPC, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

why we use negative 24vdc to a proximeter..

Answer / munty

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

Is This Answer Correct ?

10 Yes

1 No

why we use negative 24vdc to a proximeter..

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 ).

Is This Answer Correct ?

11 Yes

4 No

why we use negative 24vdc to a proximeter..

Answer / manish k soni

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

Is This Answer Correct ?

2 Yes

7 No

why we use negative 24vdc to a proximeter..

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)

Is This Answer Correct ?

5 Yes

14 No

Post New Answer

More Instrumentation Interview Questions

What are the types of valves?

0 Answers

EXPLAIN NETWORK COMMUNICATION ON DCS?

0 Answers

units of pressure,flow, level,temperature? principle of pressure gauge? calibration of pressure tx., level tx., temperature tx.flow tx.? description of two wire ,three wire and four wire R.T.D.? WHAT IS INPUT AND OUTPUT OF TX.? WHAT IS INPUT AND OUTPUT OF R.T.D. AND THERMOCOUPLE? WHAT IS HOT LOOP AND COLD LOOP? WHAT IS INPUT AND OUT PUT AND OUTPUT OF D.C.S. AND P.L.C.? PRINCIPLE AND WORKING OF HART? WHAT IS PNP AND NPN PROXY? CALIBRATION OF PRESSURE ,LEVEL ,FLOW SWITCH? DESCRIPTION OF FIELDBUS FOUNDATION? WORKING OF SOV.?

2 Answers

how magentic flow tx. vortex flow tx & ultrasonic flow tx works and its prinicle?its callibtration prosedure?

1 Answers

What is Cryogenic?

2 Answers

For what reason would you possibly be compelled to make use of a Smith Predictor. Explain the idea behind the operation of this device.

0 Answers

how can be connected thermocouple in series?what is the need?

2 Answers Hindalco,

Explain Gas Turbine startup and shutdown sequences

0 Answers

what is seebeck effect?

7 Answers

what is the procedure for auto tune in masoneialn 12300 series displacer type transmitter?

0 Answers

warning lamp does not light, but it does light when the wire from the lamp going to the sending unit is grounded (the part that plugs into the sending unit) what does this indicate)?

1 Answers

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

1 Answers

For more Instrumentation Interview Questions Click Here