How to Handle In-Vacuum and Cryo Stepper Motors
22
MA 1203-A010 EN
Fig. 8 : Type K thermal element characteristic curve
7.2 Pt100 Resistor Sensor
Pt100 resistor sensors are used with VSS in-vacuum and Cryo stepper motors in the tem-
perature range
–200 to +300 °C.
These precise sensors are used in extreme industrial and laboratory conditions. They con-
sist of a wound resistance wire that is mounted and supported inside a cylindrical ceramic
case.
Rated resistance at 0 °C:
R
0
= 100 +/
– 0.04
Resistance at 100 °C:
R
100
= 138.5 +/
– 0.1
The resistance values for other temperatures can be found in the fundamental value tables
for Pt100 resistance sensors.
Accuracy class:
T = 1/3 of class B acc. to DIN EN 60751
In accuracy class T the valid scope is reduced to
–70 to +250 °C.
For temperatures below
–70 °C class B is valid.
Tolerance
class
Scope
Tolerance in K
Tolerance
t = 0 °C
t = 100 °C
Class T
(1/3 Class B)
–70 ... +250 °C
+/
– (0.10 K + 0.0017 x |t| ) +/– 0.10 K +/– 0.27 K
Class B
–200 ... +850 °C +/– (0.30 K + 0.0050 x |t| )
+/
– 0.3 K +/– 0.80 K
