Fluke 9103-A-156 Product Manual - Page 48

9103 Dry-Well User's Guide 10.2.2 B = T3 − T2 C = ⎡ T4 ⎣⎢100 1 − T4 100 ⎤ ⎦⎥ − ⎡ T3 ⎣⎢100 1 − T3 100 ⎤ ⎦⎥ D = ⎡ T3 ⎣⎢100 1 − T3 100 ⎤ ⎦⎥ − ⎡ T2 ⎣⎢100 1 − T2 100 ⎤ ⎦⎥ E = R4 − R3 F = R3 − R2 delta = AF − BE DE − CF T1-4 - Measured temperature using thermometer. R1-4 - Value of R from display of 9103 (Press SET and DOWN at the same time.) where T1 and R1 are the measured temperature and resistance at -25°C T2 and R2 are the measured temperature and resistance at 0°C T3 and R3 are the measured temperature and resistance at 60°C T4 and R4 are the measured temperature and resistance at 125°C Compute R0 and ALPHA a1 = T2 + delta ⎡ T2 ⎣⎢100 1 − T2 100 ⎤ ⎦⎥ a3 = T4 + delta ⎡ T4 ⎣⎢100 1 − T4 100 ⎤ ⎦⎥ rzero = R4 a1 − R2a3 a1 − a3 alpha = R2 − R4 R4 a1 − R2a3 delta is the new value of DELTA computed above. 40 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664