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5 Lines
5 Lines
All lines used must be in perfect electrical order and must not exhibit any damage. Corrosion, humidity,
or pollutants on the lines must be prevented and removed if required.
Lines with glass fiber insulation or wire mesh may only be used in dry areas. In this case, the presence
of moisture can cause shunts or the formation of additional galvanic elements.
The lines may have been shielded. Shielding is used to keep away external magnetic or electrical fields.
Additionally, the area around the fields may also be protected, starting from the thermometer and its line.
The electromagnetic compatibility improves and signal transmission is ensured.
To provide the greatest possible protection against electromagnetic radiation, the lines of the sensing
elements must be routed separately from the lines of the power electronics.
5.1 Lines of RTD temperature probes
Connection lines of RTD temperature probes are available with a range of sheath and stranded wire in-
sulation materials. The diameter and the number of stranded wires also vary.
When mounting and routing the lines, pay attention to the operating temperatures as they depend on the
materials used. The typical maximum application temperatures are shown below. Follow the particular
specifications for the temperature probe in individual cases.
Shielding may be installed as an optional extra.
Data sheet 909735 (compensating cables and connection lines)
5.1.1 Correcting line resistances
Please note the following for RTD temperature probes with a two-wire circuit:
(1) Stranded wire
(2) Stranded wire insulation
(3) Shielding
(4) Sheath
Material Typical maximum application temperatures
Glass fiber 400 to 600 °C
Wire mesh 400 °C
PTFE/Kapton/PFA 260 °C
FEP 200 °C
Silicone 180 °C
TPE/PE/rubber 90 °C
PVC 80 °C
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