NTC Thermistor Calculators ( XIXITRONICS )
E helu i ka waiwai B a i ʻole ka Mahana me ka hoʻohana ʻana iā Steinhart-Hart Equation
Heluhelu B-Waiwai
E hōʻike ʻia ka waiwai B ma aneʻi
Heluhelu Steinhart-Hart
E ʻike ʻia ka mahana ma ʻaneʻi
No NTC Thermistors
ʻO nā thermistors NTC (Negative Temperature Coefficient) he mau mea ʻike wela ka emi ʻana o ke kū'ē ʻana i ka piʻi ʻana o ka mahana.
Huahelu B-Waiwai
Hōʻike ka waiwai B i ka pilina ma waena o ke kū'ē a me ka mahana:
B = [ln(R₁/R₂)] / [(1/T₁) - (1/T₂)]
Ma kahi o Kelvin (K = °C + 273.15)
Hoʻohālikelike Steinhart-Hart
ʻO kahi kumu hoʻohālike pololei no ka hoʻololi ʻana i ke kū'ē i ka mahana:
1/T = A + B·ln(R) + C·[ln(R)]³
Aia ʻo T ma Kelvin, ʻo R ke kūʻē i nā ohms, a ʻo A, B, C nā helu helu kikoʻī i ka thermistor.
Hoʻohana ke ʻano B-waiwai i kahi kumu hoʻohālike maʻalahi e manaʻo ana i ka waiwai B mau ma waena o ka pae wela. Hāʻawi ka hoʻohālikelike Steinhart-Hart i ka pololei kiʻekiʻe ma o ka hoʻohana ʻana i ʻekolu coefficient e hōʻike ana i ka hana laina ʻole.
