VEGA VEGASON 51V…53V - Manual (Page 20)

20 VEGASON 51 V … 53 V
3.2 Approvals
When using ultrasonic sensors in Ex-areas
the instruments must be suitable and ap-
proved for these explosion zones and appli-
cations. For the use on ships special type
approval certificates are available.
In hazardous areas (due to gases, vapours,
fog and dusts) only appropriately approved
instruments must be used.
The suitability is checked by the approval
authorities and is certified in approval docu-
ments.
VEGASON 51 V Ex and VEGASON 52 V Ex
sensors must be powered for the use in Ex-
zone from one intrinsically safe circuit. This is
ensured by the separator VEGATRENN
548 V Ex.
The separator provides intrinsically (ia) cir-
cuits. The resistance of the signal line must
not exceed 15
Ω
per wire.
VEGASON 51 V Ex and VEGASON 52 V Ex
sensors are approved for Ex-zone 1.
VEGASON 53 V ExS is approved for Ex-
zone 10 or zone 21.
As proof for the Ex-approval appropriate
confirmity certificates and type approval
certificates of the approval authorities are
attached to the sensors.
Please note the attached approval docu-
ments when you want to use a sensor in Ex-
areas.
Technical data - Approvals
Test and approval authorities
VEGASON ultrasonic sensors are tested and
approved by the following monitoring, test
and approval authorities:
- PTB
(Physikalisch Technische Bundesanstalt -
Physical Technical Approval Authority)
- FM
(Factory Mutual Research)
- ABS
(American Bureau of Shipping)
- LRS
(Lloyds Register of Shipping)
- G L
(German Lloyd)
- CSA
(Canadian Standards Association)