Heinrichs Messtechnik GmbH
Page 18 of 28
Operating Manual K09
If grounding cannot be guaranteed via the process connections (e.g. plastic process connections),
the flow meter must be connected to the local ground potential via the flanges. This connection
only ensures electrostatic grounding of the device and does not meet the requirements for
equipotential bonding.
Grounding with an
add-on terminal case.
Grounding without an
add-on terminal case.
11.3
Mechanical strength
The device with its glass measuring tube is to be mounted in such a way that it is protected from
mechanical damages.
11.4
Without electrical equipment
The basic version of the flow meter is a non-electrical device without its own ignition source and meets
DIN EN ISO 80079-36 requirements. It can be used in hazardous areas that require Category 2 equipment.
Markings
II 2G Ex h IIC TX Gb
II 2D Ex h IIIC TX°C Db
Reg. No.: BVS 10 ATEX H-B 034
Tech. File Reg. No. HM-K09-32-ATEX-10-02-X
Since the device does not possess its own power sources that could lead to a temperature increase, the fluid
temperature is decisive for the maximum surface temperature.
11.5
With limit switch
With the installation of a limit switch, the device becomes an electrical assembly and receives an additional
marking in accordance with DIN EN 60079-0.
The electrical and thermal data and the special conditions of the relevant EU Type Examination Certificate must
be observed.
Marking of the limit transducer:
Manufacturer Pepperl & Fuchs
Type: RC 10/15-14 NO/N3
PTB 99 ATEX 2128 X
II 2G Ex ia IIC T6 Gb
Manufacturer ifm electronic
Type: N7R**A
BVS 08 ATEX E026 / IECEx BVS 09.0016,
II 1G Ex ia IIC T6 Ga
II 1D Ex ia IIIC T85°C Da
The influence of the fluid temperature on the built-in limit transducer must be observed.
