KROHNE OPTIBAR PM 5060 C Ex ia EN - Manual (Page 17)

FURTHER NOTES
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OPTIBAR 5060
www.krohne.com 04/2014 - 4003591801 - AD OPTIBAR 5060 Ex ia R01 en
Further notes
4.1 Protection against static electricity
The OPTIBAR * 5060 VGK5/6/D*A/W C/U/0/H/T 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 C/U/0/H/T. When used as category 1G or 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
To avoid the danger of electrostatic charging of the metallic parts, the OPTIBAR * 5060
VGK5/6/D*A/W C/U/0/H/T, used as category 1G or 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 1G or 1/2G equipment, the OPTIBAR * 5060 VGK5/6/D*A/W C/U/0/H/T in
aluminium/titanium versions must be mounted in such a way that sparks from impact and
friction between aluminium/titanium and steel (except stainless steel, if the presence of rust
particles can be excluded) cannot occur.
4.5 Material resistance
For applications requiring 1G or 1/2G category equipment the OPTIBAR * 5060 VGK5/6/D*A/W
C/U/0/H/T must only be used in products against which the wetted materials are sufficiently
resistant.
.book Page 17 Thursday, June 5, 2014 3:05 PM