Converting value decimal to celcius

[farhannmhd]

Hi Everyone, 
Hi everyone, I have a simulation to read the temperature of an object, I use a 3-wire RTD PT100 connected to an ADAM 6150. Actually I can read the decimal value, but I have difficulty converting the value into temperature.

[GerdW]

Hi farhan,

I guess there is a manual for your ADAM device. All you need to do is to apply the formula given in that manual to the decimal values you are reading...

[RTSLVU]

The RTD data sheet should give you the proper series resistor and scaling formula to convert the voltage drop across the RTD to temperature. 

Without that you are kinda stuck. I guess you could use the formula for a similar RTD type and "calibrate" it by comparing the reading to a known temperature.

[altenbach]

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@farhannmhd wrote:

Actually I can read the decimal value, but I have difficulty converting the value into temperature.

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This statement is very ambiguous and can mean many things. The term "decimal" is a formatting convention to display numbers in decimal format (as opposed to e.g. hexadecimal, octal, or binary), while temperature is a physical property where the value is typically displayed in decimal, often with a fractional part and a unit. Can you see the confusion?

1. A string (pink wire!) exclusively containing characters "0" ... "9" (and maybe "-", ".", or other allowed delimiters (or even  some leading and trailing other words and symbols).
2. A numeric value (orange or blue wire!) where the indicator is formatted in decimal.
3. Something else?

If it is a string, you need to scan it and convert to a numeric datatype before applying your scaling math.

Once you show us your code, we can probably identify the problem. What does the "decimal value" (sic) actually represent?

[JÞB]

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@farhannmhd wrote:

Hi Everyone, 
Hi everyone, I have a simulation to read the temperature of an object, I use a 3-wire RTD PT100 connected to an ADAM 6150. Actually I can read the decimal value, but I have difficulty converting the value into temperature.

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What do you mean by "simulation?"  What EXACTLY are your goals?    

[Yamaeda]

If by value you mean a 4-20mA reading, then you just need to scale it with your measurement range. If it's -10 - 400°C it'll be ((Reading-4)/16 * 410)