Keithley DMM6500 Manual page 32

Section 2: Performance verification
Equation for 0 °C to 850 °C temperature range
R = R (1 + AT + BT
RTD 0
where:
•
R is the calculated resistance of the RTD
RTD
•
R is the known RTD resistance at 0 °C
0
•
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
PT100 ITS-90
D100
F100
PT385 IPTS-68
PT3916
2-22
DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
2 )
Alpha Beta
0.00385055 0.10863
0.003920 0.10630
0.003900 0.11000
0.003850 0.11100
0.003916 0.11600
at 0 °C (Ω)
Delta R
0
1.49990 100.0000
1.49710
1.49589
1.50700
1.50594
DMM6500-905-01 Rev. E June 2021