Grand
Is a 16 digit (15 digit with negative sign)
Total
number which is not zeroed when the
total display is zeroed. The Grand Total
is viewed from the operating mode as
two eight digit numbers, it may be reset
to zero from within the configuration
menu or from the operating mode.
3. CERTIFICATION
The BA354NE Rate Totaliser has ATEX and IECEx
gas and dust certification. This section of the
instruction manual describes ATEX gas certification.
ATEX dust approval is described in Appendix 1 and
IECEx certification in Appendix 2.
3.1 ATEX Ex nA certification
Notified Body Intertek Testing and Certification Ltd
have issued a Type Examination Certificate number
ITS11ATEX47255 for the BA354NE. This has been
used to confirm compliance with the European
ATEX Directive for Group II, Category 3GD
equipment. The Rate Totaliser bears the community
mark and subject to local codes of practice may be
installed in any of the European Economic Area
(EEA) member countries. ATEX certificates are also
acceptable for installations in Switzerland.
This section of the instruction manual describes
ATEX installations in explosive gas atmospheres
conforming with EN60079-14 Electrical Installations
in Hazardous Areas. When designing systems for
installation outside the UK the local Code of Practice
should be consulted.
3.2 Zones, gas groups and T rating
The Rate Totaliser has been certified as Group II
Category 3G Ex nA ic IIC T5 Gc apparatus with a Ta
of –40ºC to +70ºC. This is non-sparking apparatus
complying with EN 60079-15 that minimises the risk
of arcs or sparks capable of creating an ignition
hazard occurring during conditions of normal
operation.
The IEC guidance on maintenance procedures IEC
60079-17 permits live maintenance in Zone 2 if a
risk analysis demonstrates that this does not
introduce an unacceptable risk. The removal of
covers is permitted if this can be done without
contaminating the interior of the instrument with dust
or moisture. Since the relevant circuits are ‘ic’ [as
indicated by the certificate] the adjustment and
calibration procedures listed in this document may
be carried out in Zone 2 or 22. Some end-users
may prefer not to permit live maintenance to
minimise risk.
When connected to a suitable system the BA354NE
may be:
Installed in:
Zone 2
explosive gas air mixture not
likely to occur, and if it does
will only exist for a short time.
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