KROHNE VA FLOWMETERS EN - Manual (Page 14)

5
OPERATION
14
VA FLOWMETERS
www.krohne.com 11/2012 - 4000419904 MA VA Mech Ex AD R04 en
Operation
5.1 Initial start-up
Before initial start-up, test the materials used for the measuring section and for the gaskets for
adequate resistance to corrosion from the process product.
5.2 Operation
Variable area flowmeters must be operated in such a way that they remain within the maximum
and minimum permissible temperatures and pressures and the electrical limit values.
Variable area flowmeters may only be operated if the equipment parts necessary for safety are
effective in the long run, and are not rendered inoperable during operation.
When it comes to flammable products, the measuring sections must be included in the periodic
pressure tests of the system.
Opening the housing of the electronics compartment (equipment protection by flameproof
enclosure or dustproof housing) in hazardous areas is only permitted in a de-energised state.
WARNING!
Ignition risks caused by pressure surges, impact or friction must particularly be avoided when
titanium measuring units are used.
AD_VA_Mech_II2GD_R04_en_419904_PRT.book Page 14 Wednesday, November 7, 2012 8:43 AM