Extending leads of probes and senders
Thermocouple leads as used with the EGT and CHT probes can be extended either with ordinary
copper cable or with special K-Type extension cable. The choice of either depends on your
desired accuracy.
If it is possible in your installation to ensure that both ends of a copper extension cable will be at
the same temperature (or very close), then it is quite possible to use the copper cable. In most
open-air installations this will be the case.
Should this not be possible or you require best possible accuracy at all times, you can obtain a
special K-type extension cable. This cable is made from the same metals as your probes cable
but uses ordinary plastic sleeving to save costs.
In either case, ensure that the cable is not routed close to sources of electromagnetic interference
of any kind. The voltages present in this cable are very small and are subject to changes applied
by external fields. This can lead to false temperature indications.
You can check your installation by using a hand-held transmitter, such as an airband radio. If you
transmit a signal, no change in temperature reading should occur.
