×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Converting Level-Trol controller to tranmitter

Converting Level-Trol controller to tranmitter

Converting Level-Trol controller to tranmitter

(OP)
Hi there,

I have a 2500 series level-trol controller from Fisher.

I want to convert this controller to just a transmitter.

Can anybody help me? any link,reference,.. would be highly appreciated.

Regards

RE: Converting Level-Trol controller to tranmitter

How about connecting a P to I on the pneumatic signal line of the 2500 controller, then wire back to your PLC, SCADA, etc?

Or, the more expensive way is to use a magnetic pick-up level float device, like those made by Magnetrol (no affiliation with the vendor)? All you need to do is to match the nozzle span of the fisher to the magnetic level transmitter.

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

RE: Converting Level-Trol controller to tranmitter

If it is a model with a flanged top you can use insert a guided wave radar level transmitter from the top.  Fisher used to sell an electronic transmitter that used the torque tube from the level trol.  Don't bother with that path.

RE: Converting Level-Trol controller to tranmitter

surineman,

The 2500 comes in a caged (sometimes called bridled) and uncaged (single flange connection, the probe goes in and turns down 90 degrees) versions.

If you are using the uncaged version, replacement with the Magnetrol magnetic level float (sometimes also called "flippers") would not work these need 2 connections.

I still think the best solution is the pneumatic to 4-20 mA converter on the pneumatic signal line (that used to go to the valve), and wire that back to your control system/SCADA.

JL,

The 2500 model, caged, does have a flanged top. Having said that, I still have not seen a guided wave radar xmtr using the bridle for level control. I think cost wise, a replacement using the "flipper" with a magnetic pick-up/transmitter would be cheaper. But, my suggestion is just a P/I on the existing 2500 (cheapest and simplest).

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

RE: Converting Level-Trol controller to tranmitter

surineman, any comments?

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

RE: Converting Level-Trol controller to tranmitter

(OP)
Thank you all for responses.

I have to clarify my question I believe:

I have a 2500 series Pneumatic level-trol controller from Fisher.

I want to convert this controller to just a Pneumatic transmitter with output signal usable for generating an alarm through a pressure switch and shutting down some pumps. So I do not need the deviation signal to go to control element, but I need the 3~15 psi signal correspondent to tank level.

Sorry for any inconvenience and thanks for all replies.

Regards,

RE: Converting Level-Trol controller to tranmitter

You should be able to do that already with the 2500. It has a gap control function (on/off control).

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

RE: Converting Level-Trol controller to tranmitter

For a 3-15 pneu output, it is simple.  Just disable the reset mechanism if it is fitted with one.  Then adjust the span to Zero the output (3 psi) at the minimum level, Full scale (15 psi)  at maximum level and carramba! it's a transmitter.  

The Masoneilan 12000 series liquid level controller has the exact same mechanism for proportional controller and transmitter, except the trans has a nice fine threaded vernier for span adjustment, where the Controller has a slide-rod with a clamp for the same function.  

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!


Resources