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Section 2: Performance verification
DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
2-22
DMM6500-905-01 Rev. E June 2021
Equation for 0 °C to 850 °C temperature range
R
RTD
= R
0
(1 + AT + BT
2
)
where:
•
R
RTD
is the calculated resistance of the RTD
•
R
0
is the known RTD resistance at 0 °C
•
T is the temperature in °C
•
A = alpha [1 + (delta/100)]
•
B = –1 (alpha)(delta)(1E-4)
The alpha and delta values are listed in the following table.
RTD parameters for equations
The RTD parameters for the Callendar-Van Dusen equations are listed in the following table.
DMM6500 resistance to temperature device (RTD)
Type
Standard
Alpha
Beta
Delta
R
0
at 0
°C (Ω)
PT100
ITS-90
0.00385055
0.10863
1.49990
100.0000
D100
0.003920
0.10630
1.49710
F100
0.003900
0.11000
1.49589
PT385
IPTS-68
0.003850
0.11100
1.50700
PT3916
0.003916
0.11600
1.50594
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