Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Testing for Intrinsic safety

Testing for Intrinsic safety

Testing for Intrinsic safety

When designing inductive circuits (solenoids) for use in intrinsically safe equipment, there are curves that specify maximum inductance as a function of applied voltage.  Does anyone have these in electronic format to eliminate the "guess work" involved when trying to interpolate voltage and current values?

RE: Testing for Intrinsic safety

FM 3610 standard is free for download and contains the graphs you are looking for. Figures B-5 and B-6.


right click and save as on 3610.

The graphs were originally printed in ‘‘Some Aspects of the Design of Intrinsically Safe Circuits,’’ Research Report 256, 1968, by D. W. Widginton, Safety in Mines Research Establishment, Sheffield, England.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close