User Guide

2. Selecting a model
When selecting a model the following requirements should
be considered:
Mounting Field or panel
Location Safe area
    GasHazardousarea
Zone 0, 1 or 2
Type of protection
     Certicationauthority
    Dusthazardousarea
Zone 20, 21 or 22
Type of protection
     Certicationauthority
Number of inputs 1or2owmeterinputs
Options Display backlight
Dual alarm outputs
Pulse output
4/20mA output
TosimplifyselectionTable1summarisesthespecications
of all the eld mounting Rate Totalisers and Table 2
contains similar information for the panel mounting
models.  Detailed specications, datasheets, instruction
manuals and third party safety and ingress certicates
for each model are available from the BEKA website
www.beka.co.uk.
2.1 Mounting
The BEKA range of pulse input Rate Totalisers includes
modelsforeldandpanelmounting.
2.1.1 Field mounting
Field mounting Rate Totalisers with a ‘G’ model number
sufx have a robust glass reinforced polyester (GRP)
enclosure with an 8mm thick toughened glass window.
The enclosure has IP66 ingress protection which will not
be degraded by 7J impacts to the GRP case or 4J impacts
to the window at temperatures between -40°C and +70°C.
The enclosure’s ingress and impact protection has been
independently assessed by a third party UKAS accredited
testhouse.Theresultingtestcerticateisshownonthe
BEKA website.
The enclosure material is carbon loaded to prevent the
accumulation of static charges. The thermoset GRP is
very strong and will not corrode or degrade when used
for Rate Totaliser installations in marine and waste water
environments.Forinstallationsinhazardousareas,GRP
overcomes the restrictions limiting the use of aluminium in
potentially explosive atmospheres.
Fieldmountinginstrumentswitha‘G’modelnumbersufx
have two M20 x 1.5 tapped cable entries. To maintain
the integrity of the Rate Totaliser enclosure both cable
entries should be tted with impact resistant M20 x 1.5
IP66 glands, conduit entries or blanking plugs.
The instrument’s units of measurement and tag information
can be marked onto a slide-in scale card clearly visible
aboveandbelowthedisplay.Althougheasytocongure
on-site, Rate Totalisers can be supplied congured and
calibrated with this scale card printed with customer
speciedunitsofmeasurementfornoadditionalcharge.
A 316 stainless steel legend plate which can be supplied
laser engraved with customer specied information is
available as an option.
Field mounting Rate Totalisers are surface mounting, but
can be be pipe or panel mounted using one of the BEKA
accessory kits.
BA393G 316 stainless steel kit, attaches instrument
toanyverticalorhorizontalpipewithoutside
diameter between 40 and 73mm.
Fig 1 BA393G Pipe mounting kit
BA394G 316 stainless steel panel mounting kit
secures eld mounting instrument into a
panel aperture, but does not seal panel
aperture.
EP
TAG NUMBER SCALE
Joint between instrument
and panel is not sealed
Mounting
brackets
Fig 2 BA394G Panel mounting kit
6