5
OPERATION
18
DK37/M8 - H250/M8
www.krohne.com
05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en
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.
•
has been properly sealed in the electronic compartment or there is no explosive atmosphere
present.
The user of the system must have it checked before start-up in compliance with the national
regulations for checks before startup.
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 adjustment of the limit
switches or the operation of the display.
For more information refer to chapter "Dismantling".
5.3 Electrostatic charge
In order to avoid ignition hazards due to electrostatic charge, painted versions of the
variable area flowmeter DK37 M8. R.... and H250.. M8.. R..Ex may not be used in areas
where the following appear:
•
processes that generate strong charges,
•
mechanical friction and cutting processes,
•
spraying of electrons (e.g. in the vicinity of electrostatic painting systems) or
•
pneumatically conveyed dust is exposed.
WARNING!
Ignition risks caused by pressure surges, impact or friction must particularly be avoided when
titanium measuring units are used.
INFORMATION!
Versions with plastic housing are equipped with an electrostatically conductive plastic.
CAUTION!
Electrostatic charging of the housing surface by friction must be avoided. The devices must not
be dry cleaned.
