if we are using a transmitter there is defenite distance is specified for

Why the industry's standard current standards are from 4mA to
20mA,not from 0mA or any other range?

Question Posted / pramod

3 Answers
7665 Views
I also Faced
E-Mail Answers

Answer Posted / pramod

if we are using a transmitter there is defenite distance is
specified for it. if we dont have at least 4mA the signals
will be loss for the max. defined distance.
The mA is chosen because it will not make more electrical
hazardness in the field instead of that if micro A is used
loss of signal may occure.
By taking base as 4mA by persentage means 20 mA set as max
value

Is This Answer Correct ?

5 Yes

12 No

Post New Answer View All Answers

Please Help Members By Posting Answers For Below Questions

Hi Friends i need Electronics&Instrumentation Engg question papers for BARC written test by coming 20th May 2008 pls post ur use full info to kkumarei@gmail.com. Or for suggestions pls give one missed call to 9962122264

1939

my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card

2247

Name different types of bourdon tubes.

1120

May I have a brief note above the voltage barriers? Whats is the purpose? Please mail me if you've operational details, mail id: rajkumar.diice@gmail.com

2114

What is sensitivity in vibration probes..?

1617

it is possible to check the fail safe condition in pressure transmitter. if possible how?

1395

the whole paper was based on Transducers..questions like define repeatability, error,accuracy,precision..den there were many q. on the conversion of Pa to mmHg and other units.. also..der wer few Q. on some level sensors(with diagram)

2050

What is the main difference between Cavitation and Flashing?

14302

SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

2344

Yokogawa CENTUMVP R6.09 unable to download to Engineering Station with ExaOPC R3.75 The issue is when I try to download the common project section to the Engineering Station (STN) from the HIS in System View, it is unable to connect. The error displayed is: WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. STN0149 ---- ERROR = 2 WARNING = 1 ---- Background: >Updated the ExaOPC software on the STN from 3.60 to 3.75 >STN operating system is Windows Server 2008 R2 >HIS operating system is Windows Server 2016 Stanard Solutions attempted include: >Ensuring all IP addresses are correct and all networked devices can be pinged. >The ability to ping a device using its host name from another device ( from HIS) >Ensure both devices firewalls are disabled. >The antivirus installed on the STN is disabled. >Ensuring both devices are within the same workgroup. >Added both devices to each other's Host and LMHost files. >Running IT Security tool after changing any administrative settings.

2182

KAlman filter code for two dimension?

2052

What is voltage regulator?

1089

What is difference between Ionization heat and bimetallic heat

1628

What is difference between ESD and PLC please Explain me clearly.

4870

What is the meaning of wet leg

1225