KROHNE OPTIBAR PM 5060 C Ex d ia EN - Manual (Page 13)

FURTHER NOTES
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OPTIBAR 5060
www.krohne.com 07/2014 - 4003592001 - AD OPTIBAR 5060 Exd ia R01en
Further notes
4.1 Protection against static electricity
The OPTIBAR * 5060 VGK5/6/D*A/W E/Z/6/7 in versions with electrostatically chargeable plastic
parts, such as e.g. plastic housing, metal housing with inspection window, with plastic-coated
sensors, suspension cable or suspension hose, distance tube or connection cable with the
remote version, a caution label points out the safety measures that must be taken with regard to
electrostatic charges during operation.
Caution: Plastic part! Risk of electrostatic charge!
• Avoid friction
• No dry cleaning
• Do not mount in areas with flowing, non-conductive products
4.2 Use of an overvoltage arrester
If necessary, a suitable overvoltage arrester can be connected in front of the OPTIBAR * 5060
VGK5/6/D*A/W E/Z/6/7. When used as category 1/2G equipment, as far as necessary analogue, a
suitable overvoltage arrester must be connected in front as protection against voltage surges
according to EN 60079-14 or IEC 60079-14 Chapter 12.3.
4.3 Grounding
In order to avoid the danger of electrostatic charging of the metallic parts, the OPTIBAR * 5060
VGK5/6/D*A/W E/Z/6/7, used as category 1/2G equipment, must be electrostatically connected to
the local equipotential bonding (transfer resistance ≤ 1 MΩ), e.g. via the ground terminal.
4.4 Impact and friction sparks
When used as category 1/2G equipment, the OPTIBAR * 5060 VGK5/6/D*A/W E/Z/6/7 in light alloy
(aluminium/titanium) versions must be mounted in such a way that sparks from impact and
friction between light alloy and steel (except stainless steel, if the presence of rust particles can
be excluded) cannot occur.
4.5 Material resistance
With applications requiring 1/2G equipment, the OPTIBAR * 5060 VGK5/6/D*A/W E/Z/6/7 should
only be used in media against which the wetted materials are sufficiently resistant.
4.6 Installation / mounting
The OPTIBAR * 5060 VGK5/6/D*A/W E/Z/6/7 have to be mounted such that the sensor is
effectively secured against touching the vessel wall, under consideration of other vessel
installations and flow conditions in the vessel. This applies especially to suspension pressure
transmitters and versions with distance tube lengths over 3 m.
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