2x PT100 gives alternating values in the web interface
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Hi,
When I connect my brand new PT100 daughterboard to my Duet 2 Ethernet and configure 1 PT100 sensor then the web interface is showing an ambient temperature in line with my other sensors (or -4.7C, see question below). But when I add the second channel, the values in the web interface alternate from probable values to 2000C about every half a second.
I've configured them as (as test, I've not assigned them to heaters yet):
M308 S4 P"spi.cs1" Y"rtd-max31865" A"PT100-1" M308 S5 P"spi.cs2" Y"rtd-max31865" A"PT100-2"Tried it with firmware 3.3 and 3.4.0b7 (with correspionding web interfaces). Happens with both.
On a side note, if I use the provided 100 Ohm resistor, I get a temperature of about -4.7C. Is this normal?
Am I missing something here?
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undefined lix marked this topic as a question
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-4.7c is not normal. It should be within ~1c of 0c. Coupled with the other odd behaviour it likely indicates a problem with the daughterboard.
When and where did you purchase it?
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@phaedrux Thank you for your reply. I did have the same suspicions. It was delivered this week and bought it from reprapworld.nl so it is brand new...
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Please send an email to warranty@duet3d.com and CC your reseller. Include a link to this forum thread and the details of your original purchase. You'll receive a reply with a form to fill out.
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Will do. Thank you again!
