Model 2701 User’s Manual
Temperature Equations
F-9
RTD parameters for equations
The RTD parameters for the Callendar-Van Dusen equations are listed in Table F-10.
Example 1
Calculate the resistance of a PT100 RTD at 100°C (T). The following R
0
(
Ω
at 0°C), alpha,
and delta values are used for the PT100 RTD (Table F-10):
T = 100°C
R
0
(
Ω
at 0°C) = 100
Ω
alpha = 0.003850
delta = 1.49990
Using the above alpha and delta values, A and B are calculated as follows:
A
= 0.00385 [1 + (1.4999/100)]
= 0.00385 (1.014999)
= 0.003907746
B
= -1 (0.00385)(1.4999)(1e-4)
= -1 (0.005774615)(1e-4)
= -5.774615e-7
The resistance of the RTD at 100°C (R
100
) is then calculated as follows:
R
100
= R
0
[1 + AT + BT
2
]
= 100 {1 + [(0.003907746)(100)] + [(-5.774615e-7)(100
2
)]}
= 100 [1 + 0.3 (-0.005774615)]
= 100 (1.385)
= 138.5
Ω
Table F-10
RTD parameters
Type
Standard
Alpha
Beta
Delta
¾ a
t 0°C
PT100
ITS-90
0.00385055
0.10863
1.49990
100¾
D100
ITS-90
0.003920
0.10630
1.49710
100¾
F100
ITS-90
0.003900
0.11000
1.49589
100¾
PT385
IPTS-68
0.003850
0.11100
1.50700
100¾
PT3916
IPTS-68
0.003916
0.11600
1.50594
100¾
2701-900-01.book Page 9 Wednesday, August 3, 2011 9:43 AM
Summary of Contents for 2701
Page 344: ...12 CommonCommands 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 366: ...15 SCPIReferenceTables 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 393: ...A Specifications 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 399: ...B Model7700ConnectionGuide 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 410: ...C StatusandErrorMessages 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 417: ...D SignalProcessing SequenceandDataFlow 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 430: ...E MeasurementConsiderations 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
Page 450: ...G KE2700InstrumentDriver Examples 2701 900 01 book Page 1 Wednesday August 3 2011 9 43 AM...
