JWOO
02-15-2011, 05:36 PM
I was on a PM today and noticed that my pd transmitter was out of calibration, this is for a secondary loop for chill water. Pump always runs 100%. While running 100% pd is 11, setpoint is 25. when i trun off my primary and secondary loop my pd drops to -9. there is no paper work on how to calibrat this tranismitter. I see span and zero adjustments on the transmitter but i dont want to just truning things and dont no what i am doing. does any no have any ideas