Table 10 Rtd Constants; Rtd Sensors - Newport 6100 User Manual

Principles of Operation
5. Determine the new value of C1 and C2 from the following
6. Enter the new C1 and C2 values.
6.3.3

RTD Sensors

The following equation is used in temperature to resistance conversions:
R = R
T
R = R
T
where:
6.3.3.1 RTD Constants
The constants entered for an RTD depend on the type of curve it has. Table
10 shows three standard types.
Curve
Laboratory
US
European
The Ro constant also applies for RTD sensors. It is the RTD value at 0
and is nominally 100.00 , but can be varied from 95.00  to 105.00 .
For best results, make the range between T
possible.
calculations.
C2 = (T
[1 + (C1 x T) + (C2 x T
0
[1 + (C1 x T) + (C2 x T
0
is the resistance in  at temperature T.
R
T
T is the temperature in C.
TCR
(//C)
.003926 3.9848x10
.003910 3.9692x10
.003850 3.9080x10

Table 10 RTD Constants

a1
- T ) / (T - T ), and
a1 a2 d1 d2
C1 = T - (T * C2)
a1 d1
2
) + (C3 x (T-100) x T
2
)] for T >= 0C
C1 C2
-3
-0.58700x10
-3
-0.58495x10
-3
-0.58019x10
and T as narrow as
a2
3
)] for T < 0C
C3
-6 -12
-4.0000x10 100.00
-6 -12
-4.2325x10 100.00
-6 -12
-4.2735x10 100.00
o
C
127
R
0