5
Fig 3
Remote indication from flowmeter
3.3 Reseting total display
The BA554D total display may be reset to zero
by connecting a switch between reset terminals
RS1 and RS2 as shown in Fig 3. There is no
practical limit on the distance that the reset
switch may be from the rate totaliser.
Alternatively, the BA554D may be programmed
so that the total display is reset to zero when the
Up
and
Down
push-buttons are operated
simultaneously – see 5.15
4. INSTALLATION
4.1 Location
The BA554D rate totaliser is housed in a robust
IP66 glass reinforced polyester (GRP) enclosure
incorporating an armoured glass window and
stainless steel fittings. It is suitable for exterior
mounting in most industrial environments,
including off-shore and waste water treatment.
Please consult BEKA associates if high vibration
is anticipated.
The BA554D enclosure is surface mounting.
Accessory kits described in sections 8.5 & 8.6 of
this manual enable the instrument to be
mounted onto a vertical or horizontal pipe, or
directly onto a flowmeter conduit entry.
The field terminals and the two mounting holes
are located in a separate compartment with a
sealed cover allowing the instrument to be
installed without exposing the display assembly.
Terminals 2 and 4 are internally joined and may
be used for linking the return 4/20mA wire - see
Fig 2. Similarly terminals 5 and 6 are internally
joined and may be used for linking the cable
screens. The BA554D earth terminal is
connected to the internal EMC filters. For
maximum radio frequency interference rejection
this terminal should be connected to an earthed
cable screen.
To prevent circulating currents,
cable screens should only be earthed at one
point.
The BA554D enclosure is supplied with a
bonding plate to ensure electrical continuity
between the three conduit / cable entries.
4.2 Installation Procedure
Fig 4 illustrates the instrument installation
procedure.
a. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
b. Mount the instrument on a flat surface and
secure with two M6 screws through the 'B'
holes. Alternatively use one of the
mounting kits described in sections 8.5 &
8.6
c. Remove the temporary dust seals from the
three cable entries and install the required
glands, conduit fittings or blanking plugs.
Note:
The temporary dust seals do not
provide IP66 protection.
