3
INSTALLATION
18
OPTISWIRL 4200
www.krohne.com
08/2016 - 4005002601- AD OPTISWIRL4200 Ex-II2GD R01
3.2 Special conditions
Equipotential bonding
Vortex signal converters and flow sensors must be included in the equipotential bonding of the
hazardous area.
Lock on electronics and terminal compartment
The electronics and terminal compartment of the vortex flowmeter must be locked during
operation. The covers for the electronics and terminal compartment are secured by a lock. First
manually tighten the covers until the stop. Then loosen the covers (
≤
90
°
) so that the lock (special
closure) can be secured in the next possible position in the cover. Use a WS3 Allen key to turn the
screw.
No waiting period is necessary prior to opening the housing.
Flameproof joints in the housing
The housing must be replaced if there is any damage to the joint area. The flameproof threads
and the cylindrical joint between the terminal and the electronics compartments must be
inspected visually after opening.
