K-type thermocouple

I just received my extruder and the info said it has a K-type thermocouple (PT100 reference temperature of 0 degrees), 500MM link line in the hot end. I am using Marlin and these are the choices I have. Which one is the right one?


//===========================================================================
//=============================Thermal Settings ============================
//===========================================================================
//
//--NORMAL IS 4.7kohm PULLUP!-- 1kohm pullup can be used on hotend sensor, using correct resistor and table
//
//// Temperature sensor settings:
// -2 is thermocouple with MAX6675 (only for sensor 0)
// -1 is thermocouple with AD595
// 0 is not used
// 1 is 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
// 2 is 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
// 3 is mendel-parts thermistor (4.7k pullup)
// 4 is 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
// 5 is 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan) (4.7k pullup)
// 6 is 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)
// 7 is 100k Honeywell thermistor 135-104LAG-J01 (4.7k pullup)
// 8 is 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup)
// 9 is 100k GE Sensing AL03006-58.2K-97-G1 (4.7k pullup)
// 10 is 100k RS thermistor 198-961 (4.7k pullup)
// 60 is 100k Maker's Tool Works Kapton Bed Thermister
//
// 1k ohm pullup tables - This is not normal, you would have to have changed out your 4.7k for 1k
// (but gives greater accuracy and more stable PID)
// 51 is 100k thermistor - EPCOS (1k pullup)
// 52 is 200k thermistor - ATC Semitec 204GT-2 (1k pullup)
// 55 is 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan) (1k pullup)


Thanks Mark

Edited 1 time(s). Last edit at 05/06/2014 10:08AM by fbnr.

if it is a thermocouple you will need to wire it into a chip or a circuit to read it, arduinos are not able to read them directly. like a thermistor.

though i got to admit that the PT100 throws me off a bit, that is another type of sensor, that i am still looking for a chip to read, seeing how i have 20 of them to find a use for...lol but hey the ones i have are a nice stainless enclosed sensor.

this might help too http://reprap.org/wiki/Thermocouple_Sensor_1.0

Edited 1 time(s). Last edit at 05/05/2014 10:42PM by dissidence.

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