8
1.9 ACCESSORIES
1.9.1 Units of measurement & instrument
identification
All instruments are fitted with a display label
behind the armoured glass window. This label
can be supplied printed with any units of
measurement and tag information specified when
the instrument is ordered. Alternatively the
information may be added on-site via an
embossed strip, dry transfer or a permanent
marker.
To gain access to the display label remove the
terminal cover by unscrewing the two 'A' screws
which will reveal two concealed 'D' screws.
Remove all four 'D' screws and carefully lift off
the front of the instrument - see Fig 1.2. Add
the required legend to the display label, or
replace with a new pre-printed label which can be
supplied by BEKA associates.
The BA364D can also be supplied with a blank or
custom engraved stainless steel plate secured by
two screws to the side of the instrument
enclosure. This plate can accommodate:
1 row of 9 alphanumeric characters 10mm
high.
or 1 row of 11 alphanumeric characters 7mm
high
or
2 rows of 18 alphanumeric characters 5mm
high.
1.9.2 Pipe mounting kits
Two pipe mounting kits are available for securing
the BA364D to a horizontal or vertical pipe.
BA392D Stainless steel bracket secured by
two worm drive hose clips for 60 to
80mm outside diameter pipes.
BA393
Heavy duty stainless steel bracket
secured by a single 'V' bolt. Will
clamp to any pipe with an outside
diameter between 40 and 80mm.
1.9.3 Stem mounting kit
The BA395 stem mounting kit comprises a short
length of stainless steel conduit with a male M20
x 1.5 thread at both ends. This enables the
BA364D to be connected to and supported by
any equipment having an M20 conduit port.
1.9.4 Optional external push-buttons
For applications requiring frequent access to the
programme menus, the BA364D can be supplied
with an external membrane keypad. These push-
buttons which maintain the IP66 enclosure
integrity allow all functions to be controlled
without removing either of the enclosure covers.
1.9.5 Optional control outputs / alarm outputs
The BA364D can be supplied with two
programmable solid state single pole outputs.
The function of these outputs depends upon how
the BA364D has been programmed i.e. as a
counter, timer, tachometer or as a clock. Full
programming information is contained in each
section of this manual
WARNING
These control outputs should not be
used for critical safety applications
such as an emergency shut down
system.
When the BA364D power supply is
turned off or disconnected, both
control outputs will open irrespective
of how they have been programmed.
Annunciators on the instrument display indicate
the status of both control outputs.
1.9.5.1 Solid state output
Each output is a galvanically isolated single pole
solid state switch as shown in Fig 1.5. The
outputs are polarised and current will only flow in
one direction. Terminals A1 and A3 should be
connected to the positive side of the supply.
Ron
=
5
+ 0.6V
Roff
=
greater than 180k
Note:
Because of the series protection diode
some test meters may not detect a
closed alarm / control output.
Fig 1.5 Equivalent circuit of each control output
