10
7.3 Servicing
CAUTION!
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
Live maintenance should only be
performed when there is no risk of a
flammable atmosphere being present,
and dust or water can not enter the
enclosure. Before replacing enclosure
cover ensure that the sealing gasket is
undamaged and free from dirt and
foreign bodies.
To simplify servicing, all ATEX certified BA304NC
indicators use a common indicator assembly which
may be replaced on site. All ATEX certified
BA304NC indicator assemblies without
accessories are interchangeable.
To replace the indicator assembly remove the
three 'B' screws shown in Fig 4 which will allow the
assembly to be removed. If the instrument is fitted
with a backlight the fly-lead connecting it to the
terminals must be un-plugged. The replacement
indicator assembly may then be installed and the
enclosure reassembled.
Please note that an ATEX certified BA304NC
indicator assembly must not be replaced by a non
ATEX certified BA304NC assembly. The product
code label on all ATEX certified indicator
assemblies carry the legend ‘ATEX’.
If after replacement of the indicator assembly the
instrument still does not function, it is likely that the
fault is within the protection components on the
terminal assembly. Terminal assemblies may also
be replaced on site providing that an instrument
with a backlight is fitted with a replacement board
including terminals 12 and 13.
We recommend that faulty instruments
and instrument assemblies are returned
to BEKA associates or your local BEKA
agent for repair.
7.4 Routine maintenance
The mechanical condition of the instrument and
the electrical calibration should be regularly
checked. The interval between inspections
depends upon environmental conditions. We
recommend that initially instrument calibration
should be checked annually.
7.5 Guarantee
Indicators which fail within the guarantee period
should be returned to BEKA associates or your
local BEKA agent. It is helpful if a brief description
of the fault symptoms is provided.
7.6 Customer comments
BEKA associates is always pleased to receive
comments from customers about our products and
services. All communications are acknowledged
and whenever possible, suggestions are
implemented.
