KROHNE VA FLOWMETERS EN - Manual (Page 15)

SERVICE
6
15
VA FLOWMETERS
www.krohne.com 11/2012 - 4000419904 MA VA Mech Ex AD R04 en
Service
6.1 Maintenance
Indicator
The measuring and indicating sections are maintenance-free under normal operating conditions
and when used for the designated purpose.
Measuring section
The measuring section is maintenance-free under normal operating conditions and when used
for the designated purpose.
Depending on application, however, the measurement function may in unfavourable cases
become impaired through soiling of the measuring cone or the float.
The measuring section should be cleaned as described in the Installation and Operating
Instruction for the non-hazardous-duty versions.
The measuring section must be dismantled before it can be cleaned. In this connection, note the
information given under “Replacement of the complete flowmeter“.
Within the scope of checks required to be carried out in hazardous areas to maintain systems in
proper working order, the following visual inspections should be carried out at regular intervals:
• Check of the measuring section for leakages.
• Inclusion of the flowmeter in the periodic pressure tests of the process pipeline.
Maintenance
Maintenance work of a safety-relevant nature within the meaning of explosion protection may
only be carried out by the manufacturer, his authorized representative or under the supervision
of authorized inspectors.
AD_VA_Mech_II2GD_R04_en_419904_PRT.book Page 15 Wednesday, November 7, 2012 8:43 AM