Re: Project PID Silvia -Melbourne
Thanks Mal. I cant recall why, but I changed that setting.
I write down each P-I-D setting Ive been experminting with to no avail, and so far have 3 pages of A4 sheets full fo them!
Ive autotuned a few times, and each time it has set different parameters.
P around 120 to 400, I 390-1000, and D always around the 60 mark.
The other problem is discrepancy or accuracy. The instructions say the controller is calibrated and should not need re-calibrating, but it is telling me the boiling point of water is 103 C at sea-level.
Ive changed the t/c offset so it reads 100, the same as my DMM. But when I reattach the thermocouples (from electric jug water to Silvia boiler) the controller reads about 3 degrees hotter than the DMM.
I dont know if I trust either, now. Water seems very hot, and Silvia also seems very hot.
--Robusto
Thanks Mal. I cant recall why, but I changed that setting.
I write down each P-I-D setting Ive been experminting with to no avail, and so far have 3 pages of A4 sheets full fo them!
Ive autotuned a few times, and each time it has set different parameters.
P around 120 to 400, I 390-1000, and D always around the 60 mark.
The other problem is discrepancy or accuracy. The instructions say the controller is calibrated and should not need re-calibrating, but it is telling me the boiling point of water is 103 C at sea-level.
Ive changed the t/c offset so it reads 100, the same as my DMM. But when I reattach the thermocouples (from electric jug water to Silvia boiler) the controller reads about 3 degrees hotter than the DMM.
I dont know if I trust either, now. Water seems very hot, and Silvia also seems very hot.
--Robusto

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