Re: MAX31855 problems, unstable readings,
by ColinKing999 on Fri Feb 15, 2019 4:05 am
Hi everyone,
I acquired some braided thermocouple extension cable which I installed. The results are much the same as before.
[code
09:41:44.835 -> ***** Error code: 0
09:41:44.929 -> Temp: 925
09:41:55.007 -> ***** Error code: 0
09:41:55.053 -> Temp: 925
09:42:05.162 -> Temp: 929
09:42:15.240 -> ***** Error code: 0
09:42:15.302 -> Temp: 929
09:42:25.380 -> Temp: 929
09:42:35.442 -> ***** Error code: 0
09:42:35.536 -> Temp: 929
09:42:45.613 -> Temp: 931
09:42:55.691 -> ***** Error code: 0
09:42:55.784 -> Temp: 931
09:43:05.847 -> Temp: 932
09:43:15.924 -> Temp: 933
09:43:25.986 -> Temp: 936
09:43:36.064 -> Temp: 934
09:43:46.188 -> ***** Error code: 2
09:43:46.235 -> Temp: 934
09:43:56.313 -> ***** Error code: 2
09:43:56.407 -> Temp: 934
09:44:06.484 -> ***** Error code: 0
09:44:06.531 -> Temp: 934
09:44:16.609 -> ***** Error code: 2
09:44:16.702 -> Temp: 934
09:44:26.764 -> ***** Error code: 2
09:44:26.811 -> Temp: 934
09:44:36.920 -> ***** Error code: 2
09:44:36.967 -> Temp: 934
09:44:47.044 -> Temp: 940
09:44:57.153 -> ***** Error code: 4
09:44:57.200 -> Temp: 940
09:45:07.278 -> ***** Error code: 0
09:45:07.371 -> Temp: 940
09:45:17.433 -> ***** Error code: 2
09:45:17.527 -> Temp: 940
09:45:27.589 -> ***** Error code: 2
09:45:27.636 -> Temp: 940
09:45:37.729 -> ***** Error code: 2
09:45:37.823 -> Temp: 940
09:45:47.901 -> ***** Error code: 2
09:45:47.947 -> Temp: 940
09:45:58.025 -> Temp: 943
09:46:08.130 -> Temp: 943
code]
I hope the {code] thing works (it doesn't do what I expected it to do.)
I see that the onset temperature is about 900 degrees again.
I am baffled by the Error code 0 that seems to come up around 900. (the run lasted about 90 minutes. ) It seems to me (in ignorance) that the electronics are doing something odd here - The error code 0 is all systems OK, as I understand it, and so shouldn't raise a flag.
Why would the connections seem to change at this temperature, giving the 2 and 4 codes. I touched the thermocouple termination board (where it enters the kiln) and it was barely above room temperature.)
I am baffled!
Colin