Approvals; Explosion Protection; Overfill Protection Acc. To Whg; Ship Approvals - Vega EL 11 Operating Instructions Manual

Product description

1.4 Approvals

Explosion protection

Only certified capacitive electrodes EL** Ex 0
must be used in hazardous areas with
combustible gases, vapours or fog.
Capacitive electrodes EL** Ex 0 are suitable for
the use in hazardous areas of zone 1 and zone
0.
Proof for the explosion protection of these
instruments is the EC-type approval and the
conformity certificate possibly with national
zone 0 - annex issued by the approval
authority. These documents are generally
attached to the instruments.
When the capacitive electrodes are mounted
and operated in hazardous areas, the Ex-
installation regulations must be noted.
The information and regulations of the supplied
certificates (EC-type approval, conformity
certificate) of the capacitive electrodes as well
as of the appropriate instrument (signal
conditioning instrument, separator, safety
barrier) must be noted.
• The mounting of Ex-systems must be
generally carried out by skilled staff.
• The capacitive electrodes must be powered
from an intrinsically safe circuit; the
permissible electrical values are stated in the
appropriate certificate.
• Capacitive electrodes with electrostatically
chargeable plastic parts are provided with a
warning label informing about measures
which must be taken to avoid dangers
caused by electrostatic discharges. Note the
contents of the warning label.
• The explosion protection of the instrument
used is only ensured when the limit
temperatures stated in the certificate are not
exceeded.
• In case of danger due to oscillation or
vibration, the appropriate parts of the
capacitive electrodes must be protected.
• After shortening of the electrode cable it
must be noted that the weight is sufficiently
secured by means of pins.
Capacitive electrodes EL 4 ... 20 mA - compact

Overfill protection acc. to WHG

The information and regulations of the supplied
type approvals must be noted when a
capacitive electrode is used as overfill
protection for vessels storing water
endangering liquids. The general type approval
must be available on site.
Electrodes must be only used in such liquids
against which the materials of the wetted parts
of the capacitive electrodes are sufficiently
chemically resistant.

Ship approvals

For the use on ships, type approval certificates
are available of several ship classification
authorities (GL, LRS, ABS, BV, RINA).
CE-approval
The capacitive electrodes type EL meet the
protective regulations of EMVG (89/336/EWG)
and NSR (72/23/EWG). The conformity has
been judged acc. to the following standards:
EMVG Emission
Susceptibility
NSR
Zone 2
According to DIN VDE 0165, instruments can
be used in hazardous areas of zone 2 without
approval; they must meet the requirements in
section 6.3 of this VDE. The compliance of the
instruments with these requirements is
confirmed by Messrs. VEGA in a manufacturer
declaration.
EN 50 081 - 1
EN 50 082 - 2
EN 61 010 - 1
13