KROHNE H250 M40 NEPSI Ex ia - Manual (Page 17)

OPERATION
5
17
H250 M40
www.krohne.com 03/2013 - 4002616701 AD H250 M40 NEPSI Ex ia R01 en
Operation
5.1 Start-up
Start-up is only permitted when the variable-area flowmeter:
• is correctly installed in the system and connected.
• has been checked for the proper state with regard to its installation and connection
requirements.
The user of the system must be have it checked before start-up in compliance with the national
regulations for checks before start-up.
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.
Adjusting the limit switch and operating the display during operation is permitted. To do so,
remove the housing cover. Close the housing cover immediately after the limit switches have
been set or the display operated.
For more information see chapter "Dismantling"
5.3 Electrostatic charge
In order to avoid ignition hazards due to electrostatic charge, variable area flowmeters
may not be used in areas where the following appear:
• processes that generate large charges,
• machines with friction and cutting processes,
• spraying of electrons (e.g. in the vicinity of electrostatic painting systems),
WARNING!
Ignition risks caused by pressure surges, impact or friction must particularly be avoided when
titanium measuring units are used.
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