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AD597 install and problem with Ultimaker 2+ thermocouple temperature
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· AD597 install and problem with Ultimaker 2+ thermocouple temperature
Am not familiar with Marlin code, but as far as I can see, the AD597A uses a K-type thermocouple, and gives a reading of 1V at 100C, 2V at 200C etc up to 4V at 400C should be no problem, even up to 1200C providing the input supply voltage is at least 12V plus a bit. Farnell.com has a datasheet on the chip. This extract says
Since the output can only swing to within 2 V of the positive supply, the usable measurement temperature range will be restricted when positive supplies less than 15 V for the AD597...
. So if you give the chip a 5V supply, ti can only output at most a 3V signal corresponding to 300C. Suggest you check what voltage it's getting, and maybe give it 7V or even a bit more. Also make sure you're using a K-type thermocouple, not some thermistor or other J-ytpe or whatever TC.
I replaced a defective AD597A on my UMO, and in the process found that mine gets a 5V supply voltage. Enough for my ABS at 260C.
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andywalter 7
Am not familiar with Marlin code, but as far as I can see, the AD597A uses a K-type thermocouple, and gives a reading of 1V at 100C, 2V at 200C etc up to 4V at 400C should be no problem, even up to 1200C providing the input supply voltage is at least 12V plus a bit. Farnell.com has a datasheet on the chip. This extract says
. So if you give the chip a 5V supply, ti can only output at most a 3V signal corresponding to 300C. Suggest you check what voltage it's getting, and maybe give it 7V or even a bit more. Also make sure you're using a K-type thermocouple, not some thermistor or other J-ytpe or whatever TC.
I replaced a defective AD597A on my UMO, and in the process found that mine gets a 5V supply voltage. Enough for my ABS at 260C.
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