RST Instruments VW2100-DP - Page 33

VW2100 Vibrating Wire Piezometer
Instruction Manual
ELM0005P
RST Instruments Ltd.
Page 33
: THERMISTOR TEMPERATURE DERIVATION
Thermistor Type: YSI 44005, Dale 41C3001 B3, Alpha #13A3001 B3
Resistance to Temperature Equation:
EQUATION E-1 CONVERT THERMISTOR RESISTANCE TO TEMPERATURE
where: T = Temperature in °C
Ln(R) = Natural Log of Thermistor Resistance
A = 1.4051 x 10
-3
(coefficient calculated over the -50 to +150°C span)
B = 2.369 x 10
-4
C = 1.019 X 10
-7
FIGURE E-1 THERMISTOR RESISTANCE VERSUS TEMPERATURE
T = 1 - 273.2
A + B(LnR) + C(LnR)
3