Time based TC

I know that this is a little off topic, but I need some help finding a replacement for some old ATC mechanical time proportional temperature controlers...these units have a rotary dial that sets 0 to 99% "ON" time over a set, in my case 15 second, time period. Say you put the dial at 50%...then the output is on for 7.5 sec, and off for 7.5 sec, and so on...
What I want to do is replace the old mechanical, and hard to come by, controller, with a solid state unit...Eurotherm used to make one, but I couldn't find a listing online...Husky used the Eurotherm units to control the Sprue heaters on PET molds a few years back,I'm not sure if they still do.
I know, its old tech, but it's what TPTB want, anyway I have to continue using them until I get all my mold head heaters updated to include a t/c, which may take a year or so.
Any ideas are welcomed...BTW, these are used on machines that do not, for the most part, have PLC's in them...remember RELAY LADDER LOGIC?...and Cam switches?
David

David,

I've never used this product, but did a 5 minute search,how about this?
http://www.process-controls.com/HCS/hcs_multifunction_multirange_timer.html.

ATC also still sells the mechanical percentage timer as well a solid state percentage timer. http://www.automatictiming.com/pages_atc/percent_timers.html#304G

Hope this helps.

Andrew Evenson

Try this link, also see catalog 396 page 478 for additional makes and models. If the link does not work, try going directly to www.grainger.com, then search keyword(s) "percentage timer".

http://www.grainger.com/Grainger/searchresults.jsp

Thanks group...I think that I'll get the ATC units...they look just like the mechanical ones, so the operators won't get scared with a "new" control....
David:beerchug: :site: