Good day to all,
Please i need your support on how i can scale an analog current Signal with a range of 4mA to 20mA into temperature range of 50°C to 400°C. The 4mA corresponds to 50°C while 20mA correspond to 400°C. I tried to do the scaling with the formular below, while the 4mA result(50°C ) was okay,the subsequent values of the analog current were not correct.
I am working with this formular:
Temp in °C = [(Vout in mV) - 500] / 10 ( the voltage out is calculated from V=IR where R=250 Ohms).
So for example, if the current out is 4mA that means that the temperature is ((4mA x 250 Ohms) - 500) / 10) = 50 °C.
So if the current is 20mA, using the above formular, the result will be 450°C. I am looking for a way of adjusting the formular so that i can get exactly 400°C instead of 450°C . I would be glad if somebody could help me out. Once again thank you for the sdupport.
Best regards.
Please i need your support on how i can scale an analog current Signal with a range of 4mA to 20mA into temperature range of 50°C to 400°C. The 4mA corresponds to 50°C while 20mA correspond to 400°C. I tried to do the scaling with the formular below, while the 4mA result(50°C ) was okay,the subsequent values of the analog current were not correct.
I am working with this formular:
Temp in °C = [(Vout in mV) - 500] / 10 ( the voltage out is calculated from V=IR where R=250 Ohms).
So for example, if the current out is 4mA that means that the temperature is ((4mA x 250 Ohms) - 500) / 10) = 50 °C.
So if the current is 20mA, using the above formular, the result will be 450°C. I am looking for a way of adjusting the formular so that i can get exactly 400°C instead of 450°C . I would be glad if somebody could help me out. Once again thank you for the sdupport.
Best regards.
