SPECIAL CONDITIONS 2
11
OPTIMASS / 400
www.krohne.com10/2022 - 4003491806- AD OPTIMASS 400 Atex R06 en
2.1 Separation Elements
The body of the meter can form a partition wall between EPL Ga and EPL Gb / Db zones. The
partition wall is made from Stainless Steel ≥ 1mm.
2.2 Equipotential bonding
The MFC 400F (field)(remote) converter and the OPTIMASS X400C (compact) must be included in
the equipotential bonding of the installation. Use the bonding terminal on the converter housing,
wall bracket or mass flow meter housing mounting stem.
In separated systems, a screened cable is used and is earthed at the meter and converter ends.
Fit an equalisation cable with a minimum cross section area of 4mm
2
to the equipotential
bonding terminals on the mass flow converter housing bracket and the mass flow sensor
electronics stem.
2.3 Electrostatic charge
To reduce the ignition hazard caused by an electrostatic charge collecting on the instrument, you
must obey the following instructions:
• DO NOT clean the meter and / or converter with a dry cloth.
• DO NOT install the meter and / or converter near to any process that uses an electrostatic
charge, for example a dry powder coating system.
• DO NOT use the meter for applications where the process can generate a strong electrostatic
charge.
• DO NOT install the meter in an area where it will be in contact with airborne particles that can
cause an electrostatic charge.
1 Zone EPL Ga
2 Zone EPL Gb / Db
DANGER!
Electrostatic charging of the meter and / or converter housing MUST be avoided.
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