156 HEIDENHAIN Technical Manual MANUALplus 620
Humidity during
operation
Condensation can form, for example, if warm, moist air flows along cool sur-
faces of the electronics. Therefore, cooling units with discontinuous (e.g.two-
position) temperature control must not be used. The resulting cyclic changes
in temperature and humidity can cause condensation on the cool surfaces of
the electronics. Furthermore, you must prevent condensate from reaching the
electronics and ensure that it can drain away without causing damage.
In tropical areas it is recommended that the control not be switched off, so
that condensation is avoided on the circuit boards.
Storage
temperatures
For all control components: –20 °C to +60 °C.
Condensation on the electronics is not permitted!
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