Foxboro model 13A transmitter re-alignment and repair

Brief description of repairing and re-aligning a Foxboro model 13A pneumatic differential pressure transmitter.

[@scrappydogfinance8434]

I love that the private schools share these lessons on public sites for everyone to get a free education... keep it up... thanks

[@sinaalimoradi4677]

merci

[@petercollin5670]

I used to work in the Foxboro factory, for 2 summers. I never completely understood what the parts I made did! I find it interesting how you said that your unit had the wrong diaphragm. I worked in the capsule room, assembling and welding the diaphragms and flexures onto the capsules, then filling them with oil. Were you actually swapping out the entire capsule?

[@sparkyfromel]

you swap the capsule if it get corroded and or leaking , loosen the stirrup and re-tighten the fixtures one at the time you should get ~ the 3 PSI zero , the next problem is static alignment , increasing the pressure equally on both sides and still stay at zero differential

[@geyang7126]

Thanks

[@theLichKing1]

wish you recorded yourself actually doing these steps thanks

[@travollan]

And also of the zeroing and span calibration.