Endress+Hauser alpha-log Betriebsanleitung Seite 41

3.2 Ambient conditions:
Distance the units from strong magnetic fields
(check technical data: interference protection).
Surrounding protection to classification IP 54.
Ambient temperature range: 0...50
max 75% relative humidity without condensation.
3.3 Serial operating cable for front mounted RS232
interface
3.4 Connection hint:
Should there be a possibility of high energy transients
on the mains cable then it is recommended that an
overvoltage protector be connected.
Screened signal cables are recommended on the
following:
-
RTDs, thermocouples, ranges < 1 V
-
Long cable runs in the vicinity of strong HF interfe-
rence sources < 20 MHz (eg. long/medium and FM
transmitters)
-
When using serial interfaces.
3 Installation/connection/setting up
o ,
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