- Joined
- Dec 3, 2013
- Messages
- 1,844
Thanks for all the suggestions so far.
I gave up last night at about filter level 15 with the TC readings still drifting. I powered up the PID this morning, still at filter setting 15, here are the TC readings over 45 minutes. The readings are of the ambient temp of the oven with no heating by the elements. I have not yet run a program to turn on the heating elements since I do not yet trust the TC readings at ambient.
Ambient temp in the oven is 73.
7:30 power ON. Initial TC reading 238
7:36 TC reading drops to 85.
7:46 TC reading drifts back and forth between 85 and 80
8:00 TC reading drifts upward to 92
8:10 TC reading is 103 and slowly climbing.
8:15 TC reading is 109 and still climbing.
The unit is in "Hold" mode with no program running. Auto tune is something that has to be initiated in the setup menu so the PID should not be trying to calibrate.
I'm going to take Linghunt's advice and pull the PID out of the enclosure and just run the TC attached to the PID and see what happens.
I gave up last night at about filter level 15 with the TC readings still drifting. I powered up the PID this morning, still at filter setting 15, here are the TC readings over 45 minutes. The readings are of the ambient temp of the oven with no heating by the elements. I have not yet run a program to turn on the heating elements since I do not yet trust the TC readings at ambient.
Ambient temp in the oven is 73.
7:30 power ON. Initial TC reading 238
7:36 TC reading drops to 85.
7:46 TC reading drifts back and forth between 85 and 80
8:00 TC reading drifts upward to 92
8:10 TC reading is 103 and slowly climbing.
8:15 TC reading is 109 and still climbing.
The unit is in "Hold" mode with no program running. Auto tune is something that has to be initiated in the setup menu so the PID should not be trying to calibrate.
I'm going to take Linghunt's advice and pull the PID out of the enclosure and just run the TC attached to the PID and see what happens.