Temperature Measuring (Motors With Temperature Sensor); Type K Thermal Element - phytron LSS 26 Manual

7 Temperature Measuring (Motors with Temperature Sensor)

In vacuum environments, there is the danger of overheating the stepper motor because of
the lack of heat dissipation by ambient air. To avoid damages, use a motor with built-in
temperature sensor.
Phytron VSS stepper motors are available with type K thermal elements or type Pt100 re-
sistor sensors.
The insulated temperature sensor is integrated in the motor windings. The response time
is very short, compared to temperature sensors mounted outside the motor housing. The
temperature is measured all the time, even if only one motor phase is powered at any one
time.

7.1 Type K Thermal Element

With VSS in-vacuum and Cryo stepper motors, Type K (NiCr-Ni) thermal elements in the
temperature range from –270 to +1370 °C, accuracy class 1, are used.
Type K is a metal thermal element with nickel-based alloy conductors. Temperature rang-
es, accuracy and characteristics of thermal elements for industrial use are defined in the
IEC 584 standard (temperature measuring with thermal elements).
The accuracy of the applied thermal elements class 1 is:
–40 to +300 °C +/– 0.004 x t
t = actual temperature, the higher value is valid.
CAUTION – Possible damage!
i
Type K Thermal Element:
- The thermal element's leads are the same colour and insulated
with Kapton™ foil.
- Check for correct polarity! The minus pole is magnetic.
- Only connectors specified for K elements should be wired.
MA 1203-A010 EN
or +/– 1.5 °C
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