BEKA BA574C, Manual, Page: 7 / 26

4.2 Installation Procedure
Fig 3 illustrates the instrument installation
procedure.
a. Remove the enclosure cover by unscrewing
the four captive 'A' screws.
b. Remove the transmitter assembly from the
enclosure by unscrewing the three captive 'B'
screws and unplugging the flexible cable(s).
c. Mount the enclosure on a flat surface and
secure with screws or bolts through the four
corner 'C' holes. Alternatively use one of the
pipe or panel mounting kits described in
sections 9.2 and 9.3.
d. Remove the temporary dust seals from the
cable entries and install the required glands,
conduit fittings or blanking plugs.
e. Connect the field wiring to the terminals as
shown in Fig 4.
f. Replace the transmitter assembly and evenly
tighten the three 'B' screws.
g. Replace the enclosure cover and evenly
tighten the four 'A' screws.
Fig 4 Dimensions and terminal connections
4.3 EMC
The BA574C complies with the requirements of the
European EMC Directive 2004/108/EEC. For
specified immunity all wiring should be in screened
twisted pairs.
5. PROGRAMMING AND CALIBRATION
The BA574C is programmed and calibrated via four
push-buttons which are located behind the enclo-
sure cover. All the functions are contained in two
easy to use menus, the Programme Menu and the
Trim Menu, which are shown diagramatically in Figs
5A, 5B and 7.
The Programme Menu contains all the transmitter
parameters and enables calibration to be
performed against the internal transmitter refer-
ences.
The Trim Menu enables the transmitter display and
the 4/20mA output current to be calibrated against
an external standard, such as a voltage source or
temperature calibrator. A complete loop may be
calibrated using this menu to compensate for errors
resulting from primary element and load
inaccuracies.
Each function in the programme menu is summa-
rised in section 5.1 which includes cross references
to more detailed information in following sections.
Although this simple menu driven system enables
most adjustments to be made without repeated
reference to this manual, we recommend that the
summary of the Programme Menu, calibration
procedure using the Trim Menu and the calibration
example in sections 5.1, 6.1 and 7 are read prior
to changing function or calibrating the transmitter.
Figs 5A, 5B and 7 show the structure of both
menus.
Details of the Trim Menu are contained in section 6
which also describes periodic calibration.
When the transmitter is fitted with alarms additional
functions are added to the programme menu.
These are described in section 10.
Throughout this manual push-buttons are shown in
italics e.g.
P or Up push-button, and legends
displayed by the indicator are shown within inverted
commas e.g. 'CAL' and ' ALr2'.
Access to the Programme Menu is obtained by
operating the
P and E push-buttons simultaneously.
If the transmitter is not protected by a security
code the first parameter 'InPut' will be displayed. If
the transmitter is protected by a security code,
'COdE' will be displayed first.
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