6
SERVICE
22
OPTISWIRL 4200
www.krohne.com
01/2017 - 4004274302 - AD OPTISWIRL4200 Ex-II2G R02 en
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.
Treat cover threads as necessary with the lubricating paint UNIMOLY C220
®
.
For systems in hazardous areas, regular checks are required in order to maintain the proper
condition.
The following checks are recommended:
•
Check the housing, the cable entries and the feed lines for corrosion and/or damage.
•
Checking the measuring unit and the piping connections for leakage.
•
Check 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 built-in equipment
Due to the modular design of the vortex flowmeters, from a safety perspective, the electrical
equipment built into the indicator can be replaced with identical spare parts. To do so, remove
the housing cover. Close the housing cover immediately after the spare parts are exchanged.
Ensure that the cover seal is tight.
General notes
Exchanging and dismantling should take place in a de-energised state, if at all 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.
Display screen
The display can be rotated in 90
°
increments. It is connected to the connector pictured on the
next page.
Exchanging the converter insert
It is permitted to replace the entire VFC 200 converter insert with a brand new version identical
in construction.