Kobold Heinrichs V31, Дополнительные инструкции по эксплуатации

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Heinrichs Messtechnik GmbH
Page 8 of 12 Ex-Supplement operating manual V31
4.3.2 Process related charges
The transporting of non conductive liquids or gases in Variable Area Flow Meters can operationally lead to a charge
separation inside the measuring tube. To ensure such electrostatic build-up are discharged, Variable Area Flow
Meters must therefore be permanently grounded by the operator. If grounding is not viable via the process
connections (e.g. plastic process pipes) the flow meter must be connected to the grounding screw [1], which is
located at the rear instrument panel, via a cable to the local equipotential bonding.
(1) connection screw for grounding
4.4 Mechanical shock resistance
The instruments have been type tested for impact strength in accordance with DIN EN ISO 80079-36. The devices
were equipped with a polycarbonate protective cover for the glass measuring cone. The requirements with impact
energy of 7 Joule to metal parts and at 4 joules translucent parts were met.
Nevertheless, we recommend that you install the Variable Area Flow Meter with its glass measuring tube so that it
is protected from mechanical damage.
4.5 Operation in hazardous areas caused by dust
With regard to surface temperatures and dust deposits, the requirements for establishment according to
DIN EN 60079-14 " Electrical installations design, selection and erection
“ must be met.
When used in potentially explosive dust environments, regular cleaning is required to avoid dust deposits from
exceeding a thickness of 5mm.
1