KROHNE DK 32-DK 34-DK 37 EN - Manual (Page 21)

ELECTRICAL CONNECTIONS
4
21
DK32 - DK34 - DK37
www.krohne.com 06/2014 - 4000287103 MA DK32-34-37-R05-en
4.7 Protection category
The variable area flowmeters DK32 / DK34 / DK37 have been tested for ingress protection
according to EN 60529. The following grades of protection are confirmed:
Therefore it is essential to observe the following points:
• Use only original gaskets. They must be clean and free of any damage. Defective gaskets have
to be replaced.
• The electrical cables used must be undamaged and must comply with regulations.
• The cable has to be laid with a loop 3 upstream of the flowmeter to prevent water from
getting into the housing.
• The cable glands 2 have to be firmly tightened.
• Close the unused cable glands using blanking plugs 1.
• Do not remove the specified outer sheath from the cable gland.
Ingress Protection
EN 60529 Mechanical version
without cable glands Electrical version
with cable glands
DK32 / DK34 IP66 / IP68 IP65
DK37 IP66 IP66
DANGER!
After all servicing and maintenance work on the flowmeter, the specified protection category has
to be ensured again.
Figure 4-8: Cable gland
1 Close the unused cable glands using blanking plugs.
2 The cable glands have to be firmly tightened.
3 The cable has to be laid with a loop.
MA_DK32_34_37_R05_en_287103_PRT.book Page 21 Friday, June 6, 2014 11:42 AM