KROHNE H250 M40 EN - Manual (Page 34)

4
ELECTRICAL CONNECTIONS
34
H250 M40
www.krohne.com 11/2012 - 4000640702 MA H250 M40 R02 en
4.3 Grounding connections
4.4 Protection category
The measuring device meets all requirements of protection category IP66/68.
Therefore it is essential to observe the following points:
• Use only original gaskets. They must be clean and free of any damage. Defective gaskets must
be replaced.
• The electrical cables used must be undamaged and must comply with regulations.
• The cables must be laid with a loop 3 upstream of the measuring device to prevent water
from getting into the housing.
• The cable feedthroughs 2 must be tightened.
• Close the unused cable feedthroughs using blanking plugs 1.
1 Grounding connection in the indicator
2 External grounding connection
DANGER!
The grounding wire may not transfer any interference voltage. Do not use this grounding cable to
ground any other electrical devices.
DANGER!
After all servicing and maintenance work on the measuring device, the specified protection class
must be ensured again.
1 Use blanking plugs if no cable is routed through
2 Tighten cable feedthrough firmly
3 Lay the cable in a loop
MA_H250_M40_R02_en_640702_PRT.book Page 34 Wednesday, November 28, 2012 12:23 PM