BEKA BA314NG, Руководство пользователя

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APPENDIX 3
ETL & cETL certification for installations in USA
and Canada.
A3.0 cETL Mark
For installations in the USA and Canada, the
BA314NG Tachometer has ETL and cETL Ex nA and
Ex tc approval, Control Number 4008610. Copies of
the Authorisation to Mark may be down loaded from
the BEKA associates website www.beka.co.uk or
requested from the BEKA associates sales office.
A3.1 ETL and cETL certification
The US and Canadian standards used for assessment
and certification of the BA314NG Tachometer are
listed on the cETL Authorisation to Mark.
ETL codes for USA
Class I Zone 2 AEx nA ic IIC T5 Gc
Zone 22 AEx ic tc IIIC T80ºC Dc
Ta = -40°C to 60°C
cETL codes for Canada
Ex nA ic IIC T5 Gc
Ex n IIC T5 Gc
Ex ic tc IIIC T80ºC Dc
Class III Div 2 Class II Div 2 Gp F G
Ta = -40°C to 60°C
The ETL and cETL safety parameters are the same as
ATEX and IECEx parameters, therefore the systems
shown in the main section of this manual and in
Appendix 1 may be used for US and Canadian
installations subject to complying with the local codes
of practice.
The Tachometer's front panel push button contacts
are non incendive and have been certified intrinsically
safe Ex ic, without the need for an external Zener
barrier or galvanic isolator, as shown on the ETL
Authorisation to Mark. This allows the Tachometer to
be adjusted and configured live when installed in
Zone 2 or 22 hazardous areas.
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