Answer / ayaz

250 ohm  use in loop only for hart protocol and use only smart devices 

Answer / ashraf

According to the HART Foundation spec, the 1200-2400 Hz HART signal needs a minimum (230 ohm) resistance in the loop to create a HART signal with enough amplitude to meet the sensitivity requirements of a HART modem receiver.

Answer / hitesh

convert analog signal 4-20mA to digital signal 1-5V

Answer / nitesh kumar

For converting 4-20 mA 

Answer / nilesh66in

The power supply is a low impedance to the hart signal
shorting it out. Adding the resistor raises the impedance
so that the signal can be detected by the calibrator. The
HART protocol uses 1200 baud Frequency Shift Keying (FSK)
based on the Bell 202 standard to superimpose digital
information on the conventional 4 to 2OmA analog signal.


Nilesh Bhagwat ( Sr. Inst Tech)

Answer / ritesh patel

convert output of digital to analog

what is maximum vaccume?

4 Answers  

what is isolation Transformer???...

3 Answers   Emerson,

What is the difference between floating and fixed voltage?

1 Answers  

given a processor batch of 1000 resistors moving on the conveyor belting in a large factory. the resistors is value at 10k ohms each but when the resistors reach the quality control, some of the resistor has been rejected caused by failure in manufacturing.the high quality measurement is used to determine the failure. describe the instrumentation terminology in measurement of a system above with explaining the important in:- -reliability -sensitivity -repeatability -precision -range -resolution -linearity -hysteresis -error -accuracy (answer must related to the scenario above)

0 Answers  

What is deffrence between Battery and capacitor

3 Answers   Siemens,

What should be the ideal tapping location for pressure differential transmitter for liquid service. If the tapping taken from the top of the pipe then PDIT will work properly or not. If PDIT do not work properly then what minimum corrective action should be taken in order to solve wrong tapping locations.

1 Answers  

what is the diffirence between Earth and Neutral

4 Answers  

can i get model question papers of mahagenco exam?

11 Answers   MahaGenco, MSGEN,

What is Process portal A(PPA)?

1 Answers   ABB,

we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

0 Answers  

is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?

0 Answers  

If the vibration probe near to the shaft,then output voltage will be decreased r increased?How?

1 Answers   Amtek, Hamsco, IJT,