VEGA VEGASWING 83A - Manual (Page 5)

VEGASWING 81A and 83A 5
Product description
Recurring test acc. to WHG
According to the type approval WHG
(Z-65.11-154) the recurring test acc. to WHG
can be carried out by pressing a key on the
VEGATOR 536 EX, 537 EX, 636 EX signal
conditioning instrument. The sensor must not
be removed, nor made to respond by filling
the vessel. This is valid for VEGASWING
81 A EX and 83 A EX with two-wire
SWING E82 Z EX oscillator .
VEGASWING 81 A EX and 83 A EX meet the
fail-safe requirements to class 3 (AK 1 … 3)
acc. of DIN 19 251 in mode A (overfill protec-
tion).
Configuration
A measuring system consists of:
- a VEGASWING with SWING E82 C,
SWING E82 R or SWING E82 T oscillator
- external instruments, switched by VEGA-
SWING
or
- a VEGASWING with SWING E82 Z or
SWING E82 Z EX oscillator
- VEGATOR 536 EX, 537 EX or 636 EX signal
conditioning instrument or an already
mounted instrument, e.g. VEGA TOR
425 EX, 534 EX, 825 EX
- external instruments switched by VEGA-
TOR.
1.2 Approvals
Explosion protection
Only certified VEGASWING 81A EX0, 83A
EX0 vibrating level switches should be used
in hazardous areas caused by combustible
gases, vapours or fog, . VEGASWING
81A EX0, 83A EX0 are suitable for use in
hazardous areas zone 1 and zone 0.
The EU-type approval issued by the ap-
proval authority is attached to the instruments
as proof of explosion protection. Ex-mounting
regulations should be noted when VEGAS-
WING 81A EX0, 83A EX0 vibrating level
switches are mounted and operated in haz-
ardous areas. The information and conditions
of the supplied certificates (EU-type ap-
proval, conformity certificate) for VEGAS-
WING 81A EX0, 83A EX0 as well as the
appropriate electrical equipment (VEGA TOR
signal conditioning instrument, separator ,
safety barrier) must be taken into account.
• The mounting of Ex-systems must always
be carried out by skilled staff.
• VEGASWING 81A EX0, 83A EX0 must be
powered by an intrinsically safe circuit; the
permissible electrical values are stated in
the appropriate Ex-type approval certifi-
cate.
• VEGASWING 81A EX0, 83A EX0 with
enamelled tuning fork or plastic parts ac-
quiring static electricity have a warning
label stating the measures to be taken to
avoid dangers due to electrostatic dis-
charges. The contents of the warning label
should be noted.
• The explosion protection of the electrical
equipment used is only ensured when the
limit temperatures stated in the certificate
are not exceeded.
• In the case of dangers due to oscillation
and vibrations, the appropriate parts of
VEGASWING 83A EX0 should be secured
effectively against these dangers.