KROHNE VA 40 ATEX II2G Ex i EN - Manual (Page 13)

SERVICE
6
13
VA40
www.krohne.com 06/2013 - 4002262402 - MA VA40-Ex-II2G-AD R02 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.
• Checking the measuring unit and the indicator for dust deposits.
• Including the flowmeter in the regular pressure test of the process line.
6.2 Dismantling
Exchanging the limit switches
The limit switch is to replace with an identical spare part in accordance with safety guidelines.
Exchanging the entire device
Removal and installation are the responsibility of the operator.
If at all possible, the meter should be electrically isolated before removing and replacing the
indicator. 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!
Avoid electrostatic charges when cleaning the sight window!
CAUTION!
•
Pressurized pipes have to be depressurized before removing the measuring unit.
• 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 gaskets have to be used when re-installing the device in the piping.
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