How to create custom thermistor inc file?

[hobieboy]

Hi,
Sorry about newbie question as I upgrade from MS1-extra to MS3 and from Megatune to Tunerstudio.
As title says - how do I do that if I don't want to create a linear table using TS's built-in 3 point them generator?
TS allows me to import a custom inc file but what format? How to create that?

I had an old file created by Easytherm then I hand modified some values but that doesn't work.

thanks.

[jsmcortina]

Hi,
Sorry about newbie question as I upgrade from MS1-extra to MS3 and from Megatune to Tunerstudio.
As title says - how do I do that if I don't want to create a linear table using TS's built-in 3 point them generator?

TS does not create a linear table, as far as I'm aware it uses the same algorithm as not-so-Easytherm did.

James

[LT401Vette]

Yes, same algorithm.
You can see the resultant table data in the log file created in you project folder when you write the table.

[hobieboy]

Is there a way to download the .inc file currently used by MS3 then hand craft the changes then re-download it back?
Or do you mind pointing me to what field structure I need to use to create the customer .inc file so TS can import then download to MS3?

thanks!

[LT401Vette]

You could write the table with the 3 points, then use the data in std_ms2gentherm.log to make an inc file.

The inc file should have 1024 rows, one for each ADC.

Code: Select all

	DB	210T	;   0 - sensor failure.
	DB	475T	;   1 -  435.4
	DB	409T	;   2 -  369.4
	DB	375T	;   3 -  334.8
	DB	351T	;   4 -  311.7
...
...

Then tweak your values in that, load it as a custom.inc
You can look at the thermfactor.inc file in the TS install for an example, but that is only 255 ADC's

[hobieboy]

Hi Phil,
Thanks for the pointers. I tried what you suggested, but want to confirm that I did it right.
I unlocked the calibrate tap and select Coolant Temperature Sensor using the 3-point Therm Generator method.
I didn't select any sensor type (left it as blank). Then entered the 3 custom temp/resistance values I have.
After written to controller I looked at the std_ms2gentherm.log file. The comment section of the file still shows 3 different resistance/temperature pair than what I entered.

Is this correct behaviour? I did check the file modified date and it is correct.

thanks.

[Alfagta]

Yes, same algorithm.
You can see the resultant table data in the log file created in you project folder when you write the table.

Hello,
would it possible to add the A,B,C Constants to the log File which are used for the Calculation?

Best regards

[LT401Vette]

Yes, same algorithm.
You can see the resultant table data in the log file created in you project folder when you write the table.

Hello,
would it possible to add the A,B,C Constants to the log File which are used for the Calculation?

Best regards

It is.

Code: Select all

//------------------------------------------------------------------------------
//--  Generated by TunerStudio 
//--  Date: 4-14-2014
//--  Time: 7:59
//--  This file merely records what was sent to your Controller,        
//--  and may be deleted at any time.                                                    
//--  Selected type: Coolant Temperature Sensor 
//------------------------------------------------------------------------------

//-- generated using refTable Generator:thermGenerator
//-- Table Identifier:000//--    Generated by ThermTableGenerator using user input values. 
//--    Bias Resistor value: 2490.0 Ohms
//--    Temperature1: -40.0(C), 	Resistance 1: 100700.0 Ohms 
//--    Temperature2: 30.0(C), 	Resistance 2: 2238.0 Ohms 
//--    Temperature3: 99.0(C), 	Resistance 3: 177.0 Ohms 
//-- 

//----------------------------------------------------------//
ADC 	Value 	MSVal 	volts
0	180.00	1800 	0.000
1	180.00	1800 	0.005
2	180.00	1800 	0.010
...
...

[Alfagta]

What i mean with A,B,C are the used Steinhart Hart Coefficients.
Easytherm did Saved the Coefficients to the file.

[LT401Vette]

Ah, ok..