KROHNE OPTIFLUX 2000-4000-5000-6000 -IFC 100 Ex EN - Manual (Page 21)

MAINTENANCE AND SERVICE
5
21
OPTIFLUX
www.krohne.com 04/2009 - 7.30685.22.00 - EX IFC 100 en
5.1 Maintenance
The flowmeters are maintenance free with respect to the flowmetering properties. Within the
scope of periodic inspections required for electrical equipment installed in hazardous areas it is
recommended to check the housing for signs of damage or corrosion. This is especially
important for the flameproof Ex d flowmeter or coil housing of sizes DN25...150.
Specific notes for Ex d flowmeters OPTIFLUX 2100 C / 4100 C, sizes DN25...150:
• In case of replacement of one or more of the four hexagon socket head cap screws which
connect the converter housing with the sensor housing, equivalent types must be used:
M6x16 hexagon socket head cap screws to EN ISO 4762, steel quality A2-70 or A4-70.
• If needed, contact the manufacturer for information on the dimensions of the flameproof
joints.
Specific note for Ex q flowmeters OPTIFLUX 2100 C / 4100 C, sizes DN25...150 and DN200...300: Specific note for Ex q flowmeters OPTIFLUX 2100 C / 4100 C, sizes DN25...150 and DN200...300: Specific note for Ex q flowmeters OPTIFLUX 2100 C / 4100 C, sizes DN25...150 and DN200...300: Specific note for Ex q flowmeters OPTIFLUX 2100 C / 4100 C, sizes DN25...150 and DN200...300:
The coil housing is factory sealed. After opening of the seal the flowmeter must be returned to
the manufacturer to re-fill the flowmeter with the Ex q approved powder filling material.