Hi Folks,
I bought 3 MAX31865 temperature sensor amplifiers for the RTD - PT100 temperature sensor.
Just because I was feeling paranoid, I checked the resistor on the board, and it reads 4301, which should be used for the PT1000 sensor, not the PT100 sensor.
Am I reading this correctly?
Picture of the resistor attached.
Thanks in advance, Peter
MAX31865 - is this PT100 or PT1000?
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Please be positive and constructive with your questions and comments.
- adafruit_support_bill
- Posts: 88149
- Joined: Sat Feb 07, 2009 10:11 am
Re: MAX31865 - is this PT100 or PT1000?
There are 2 different marking systems for SMT resistors - 3 digits and 4 digits. They are similar enough to be confusing.
The resistor on your board uses a 3-digit code. The first two digits are the significant digits, the third is the multiplier (i.e. how many zeros to add)
So "431" is 430 Ω which is correct for a PT100.
https://learn.adafruit.com/adafruit-max ... aq-3012913
The resistor on your board uses a 3-digit code. The first two digits are the significant digits, the third is the multiplier (i.e. how many zeros to add)
So "431" is 430 Ω which is correct for a PT100.
https://learn.adafruit.com/adafruit-max ... aq-3012913
If marking is 4300 or 431 its PT100
If marking is 4301 or 432 its PT1000
- pthompson509
- Posts: 9
- Joined: Mon Jun 10, 2013 8:49 pm
Re: MAX31865 - is this PT100 or PT1000?
Thank you. As always, it helps to read ALL of the descriptive text, doesn't it?
Cheers!
Cheers!
Please be positive and constructive with your questions and comments.