A community for students.
Here's the question you clicked on:
 0 viewing
Koikkara
 one year ago
Why 4ma20ma ?
Koikkara
 one year ago
Why 4ma20ma ?

This Question is Closed

KenLJW
 one year ago
Best ResponseYou've already chosen the best response.0I suspect the question is in relation to measuring devices and transmission within and control system. Basically you can't use zero because you can't detect a malfunction transmission. The standard industry is 4  20mA and 14 V. A system using these ranges in transmission of temperature, pressure and other system measurements which are relied to control panels and controllers.

KenLJW
 one year ago
Best ResponseYou've already chosen the best response.0Ideally a output of an electric/electronic circuit can be simulated with a series Thevenin voltage/impedance or it's corollary a parallel Norton/impeadance. The impedances are the same and IN = VTH/impedance. Personally if one is valid so should the other, though I remember some saying the contrary.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.