for HP 42S
NTC-10K - Murata's NTC thermistor Resistance V.S. Termperature functions

Usage
Resistance → Temperature conversion : [SOLVER] [XV10K|XH10K] Resistance [R] [Temp]
Temperature → Resistance conversion : [SOLVER] [XV10K|XH10K] Temperature [Temp] [R]
Variables
MEM "R"    : resistance [&Omega];
MEM "T_c" : temperature [°C]
Approximate equation:
R_T = R_{25} \exp\big\{ B \big( \displaystyle\frac{1}{ 298.15 + (T - T_{25}) + C (T - T_{25})^2 + D (T - T_{25})^3} -  \frac{1}{273.15 + T_{25}}\big)\big\}
RT  : Resistance [Ω] at temperature T [°C]
R25 : Resistance [Ω] at 25 °C
T25 : Temperature 25 °C
T   : Temperature in °C

Part number B C D
NTSA0XV103 3878.1 2.797 ×10-4 2.80 ×10-7
NCP21XV103 3866.5 3.732 ×10-4 -6.50 ×10-7
NCP15XH103 3327.4 5.963 ×10-4 6.59 ×10-7
Approximation errors
fig.1 Approximation error V.S. Temperature, Resistance V.S. Temperature (NTSA0XV103)
NTSA0XV103 Resistance V.S. Temperature

fig.2 Approximation error V.S. Temperature, Resistance V.S. Temperature (NCP15XH103, NCP21XV103)
NCP15XH103/NCP21XV103 Resistance V.S. Temperature
Program list (Rev.1.10 Mar. 3, 2010)
NTC thermistor approximate function for NTSA0XV103, NCP21XV103 and NCP15XH103
NTSA0XV103 NCP21XV103 NCP15XH103
01 LBL "A0XV"
02 MVAR "T_c" 
03 MVAR "R"
04 RCL "T_c"
05 25
06 -
07 ENTER
08 ENTER
09 ENTER
10 2.8E-7
11 ×
12 2.797E-4
13 +
14 × 
15 1 
16 +
17 ×
18 298.15
19 +
20 1/χ
21 298.15
22 1/χ
23 -
24 3878.1
25 ×
26 E↑χ
27 1E4
28 ×
29 RCL- "R"
30 .END.
01 LBL "P1XV"
02 MVAR "T_c" 
03 MVAR "R"
04 RCL "T_c"
05 25
06 -
07 ENTER
08 ENTER
09 ENTER
10 -6.50E-7
11 ×
12 3.7322E-4
13 +
14 × 
15 1 
16 +
17 ×
18 298.15
19 +
20 1/χ
21 298.15
22 1/χ
23 -
24 3866.5
25 ×
26 E↑χ
27 1E4
28 ×
29 RCL- "R"
30 .END.
01 LBL "P5XH"
02 MVAR "T_c" 
03 MVAR "R"
04 RCL "T_c"
05 25
06 -
07 ENTER
08 ENTER
09 ENTER
10 6.59E-7
11 ×
12 5.963E-4
13 +
14 × 
15 1 
16 +
17 ×
18 298.15
19 +
20 1/χ
21 298.15
22 1/χ
23 -
24 3327.4
25 ×
26 E↑χ
27 1E4
28 ×
29 RCL- "R"
30 .END.
Download 'A0XV' / 'P1XV' / 'P5XH' - raw program files for the Free42

SEE ALSO


APPENDIX

Program library for the HP 42S

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