Answer / praveen

0 milliamp is dead zero and 4 milliamp is live zero

Answer / shibli nomani

Live0-At 0 input ,output has some value e.g at 0 tx has 4mA.
Dead0-At 0 input, output has Also zero.

What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.

0 Answers  

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A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers  

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How to connect another 24 volt dc power supply in circuit when previous power supply has become weak.what is the connection?

2 Answers   Bhole Baba Dairy Industries,

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How to measure the vibration..?

1 Answers   Madhucon,

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WHAT REASEAN USE TRANSMETER TWO WIRE & FOUR WIRE

5 Answers   Kentz,

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what is Automation?

3 Answers  

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how to calibrate an error for pressure transmitter, make it easy to understand

2 Answers   Descon,

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Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?

0 Answers  

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In a ball valve which require 24v dc supply to operate, whose solenoid valve doesn't have any + or - indication, how can we make wiring connectionto solenoid valve?

1 Answers   Process Control Technologies,

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how control valve works?

7 Answers   Qatar Airlines,

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plz give me the logic for how a pushbuttoon can be worked as atoggle switch i m working with allenbradely/micrologix1200/rslogix500

3 Answers  

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if drum level is low what is interlock? i mean we put interlock to fd fan or id fan ?

4 Answers  

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