KROHNE DK 32-DK 34 ATEX II2G Ex i EN - Manual (Page 12)

6
SERVICE
12
DK32 DK34
www.krohne.com 11/2012 - 4000422303 AD DK32/34 II2G R03 en
Service
6.1 Maintenance
Maintenance work of a safety-relevant nature within the meaning of explosion protection may
only be carried out by the manufacturer, his authorised representative or under the supervision
of authorised inspectors.
For systems in hazardous areas, regular tests are required in order to maintain the proper
condition.
The following checks are recommended:
• Checking the housing, the cable entries and the feed lines for corrosion and/or damage.
• Checking the measuring unit and the piping connections for leakage.
The cover is to be closed following maintenance work on the display unit.
6.2 Dismantling
Replacing the display part
Due to the modular design of the variable area flowmeter, it is possible to replace a complete
display with an identical spare part in accordance with safety guidelines.
Exchanging the entire device
Removal and installation is the user's responsibility.
Any replacement and removal should take place in a de-energized state if possible. If that is not
possible, the basic conditions for intrinsic safety (e.g. no grounding or connection of different
intrinsically safe circuits to one another) must be observed during dismantling.
CAUTION!
There may be a loss of measuring accuracy!
CAUTION!
•
Pressurized pipes must be depressurized before removing the measuring section.
• In the case of environmentally critical or hazardous products, appropriate safety precautions
must be taken with regard to residual liquids in the measuring unit.
• New seals must be used when re-installing the device in the piping.
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