MAX31855 error

[danjun]

Hi,
I have the Thermocouple board MAX 31855 and the Thermocouple K- type up to 1350C.
The problem is that the TC is NOT on this board working.
Still this output: Something wrong with thermocouple!
Internal Temp = -127.94

The TC is normally working with any other PID (up to 1300C) or on analog chip (but there is only up to 500C).

I got the MAX card today and can not find the problem.
The pins etc, lib, is all correctly connected and installed as you describe in the tutorial.
Thanks for fast reply.

Daniel

[adafruit_support_bill]

If you post photos of the front & back of the board we'll check the soldering. Make sure both leads are firmly clamped in the terminal blocks.

Are you using a capacitor in parallel with the TC? If so, soldering the capacitor to the back of the board usually works better than clamping both sets of leads.

[danjun]

The soldering isOK.

How voltage must be measured on outputs and inputs?
The data are same if TC is or isn't connected.
how is possible test the board? Chip?

Thanks
daniel

[adafruit_support_bill]

The soldering isOK.

No offense, but there are several photos here from people that said the same thing. Please post photos.

How voltage must be measured on outputs and inputs?
The data are same if TC is or isn't connected.
how is possible test the board? Chip?

The TC voltages are in the microvolt range. This is below the range of most multimeters. The outputs are digital signals. If you are getting an internal temp reading, your connections to the Arduino are correct. The thermocouple error is usually due to a broken thermocouple or a bad connection.