We are using 4 -20 ma because we will get linear current with respect to

Why do we go for 4-20mA? why not other standara?

Question Posted / charankumar

6 Answers
9997 Views
I also Faced
E-Mail Answers

Answer Posted / charankumar

We are using 4 -20 ma because we will get linear current
with respect to 24 V,so i most of cases 4-20ma is used.
If u want to try plese plot a graph and check.

Is This Answer Correct ?

1 Yes

1 No

Post New Answer View All Answers

Please Help Members By Posting Answers For Below Questions

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2070

how u choose thermowell lenght n pnumatic C/v size?

2093

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.

2180

what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .

4830

i have done DAE in Instrumentation and Process Control. i have applied for an apprentice training in chemical company after three day my interview will be conduct but i need more information about industrial process control and controller. my e mail is imran_dilsetu@yahoo.com please tell me interview question relative to instrumentation ?

2305

why use 50% lel methane gas concentration for gas detector calibration instead of 60% lel gas concentration whereas the hi alarm set at 60% lel.

2712

what is the difference between Cv and air consumption? why the customer needs Air consumption details?

1964

What is furnace draft control?

1064

Calibration procedure for Electro magnetic Flow meter

4468

Explain plc level and its type?

1324

What is standard procedure of manual mapping in Radar type level transmitter?

1926

Give Detail information about plc,dcs,and scada system?

1710

What materials are used in thermo wells?

1147

How to control flow variations in magnetic flow maters..... When i will provide proper earthing?

2302

what is the process to make control schematic ?

2232