I recently ordered and received a Max31865 from your company. The breakout board is packaged as Adafruit PT 1000 Temp Sensor max31865 which matches the unit I ordered.
However, the reference resistor provided with the unit I received is 432 ohms. Previous Max 31865s for a PT1000 have a 4300 ohm resistor.
Please confirm the unit I received with work, without physical modification, with a PT1000 RTD.
The reference resistors for my PT100 breakout boards have 430 ohm resistors. Why does the unit in question differ from my existing PT1000 units?
Max32865 for PT1000 - Ref Resistor
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- adafruit_support_carter
- Posts: 29159
- Joined: Tue Nov 29, 2016 2:45 pm
Re: Max32865 for PT1000 - Ref Resistor
Are you sure about the value? Check here for how to determine:
https://learn.adafruit.com/adafruit-max ... fier/f-a-q
If the resistor has "432" on it, then it is a 4.3kohm resistor for use with 1kohm RTDs (PT1000).
https://learn.adafruit.com/adafruit-max ... fier/f-a-q
If the resistor has "432" on it, then it is a 4.3kohm resistor for use with 1kohm RTDs (PT1000).
- Uncle_Shorty
- Posts: 3
- Joined: Tue Nov 15, 2022 12:39 pm
Re: Max32865 for PT1000 - Ref Resistor
I understand now. Pt1000 = 432 & PT100 = 431 on Adafruit boards. Thank you.
I think the two units I have that are marked 4300 are not authentic adafruit boards. I will go back into my records to see where they came from.
I think the two units I have that are marked 4300 are not authentic adafruit boards. I will go back into my records to see where they came from.
Please be positive and constructive with your questions and comments.