5. CONFIGURATION AND CALIBRATION
Indicators are configured and calibrated via the four
front panel push-buttons. All the configuration
functions are contained in an easy to use intuitive
menu that is shown diagrammatically in Fig 8.
Each menu function is summarised in section 5.1 and
includes a reference to more detailed information.
When the indicator is fitted with alarms additional
functions are added to the menu which are described
in section 8.3
Throughout this manual push buttons are shown as
P
,
E
,
▼
or
▲
, and legends displayed by the indicator
are shown within inverted commas e.g. 'CAL' and '
ALr2'.
Access to the configuration menu is obtained by
operating the
P
and
E
push buttons simultaneously. If
the indicator security code is set to the default 0000
the first parameter 'FunC' will be displayed. If a
security code other than the default code 0000 has
already been entered, the indicator will display 'CodE'.
Pressing the
P
button will clear this prompt allowing
each digit of the code to be entered using the
▲
and
▼
push buttons and the
P
button to move control to
the next digit. When the correct four digit code has
been entered pressing
E
will cause the first parameter
'FunC' to be displayed. If the code is incorrect, or a
button is not pressed within twenty seconds, the
indicator will automatically return to the display mode.
Once within the configuration menu the required
parameter can be reached by scrolling through the
menu using the
▲
and
▼
push buttons as shown in
Fig 8. When returning to the display mode following
recalibration or a change to any function, the indicator
will display ‘dAtA’ followed by ‘SAVE’ while the new
information is stored in non-volatile memory.
All new indicators are supplied calibrated as
requested at the time of ordering. If calibration is not
requested, indicators will be configured as follows:
BA507E-SS BA527E-SS
Access code ‘CodE’
0000
0000
Function ‘FunC’
Std
Std
Display at 4mA ‘Zero’
0.0
0.00
Display at 20mA ‘SPAn’
100.0
100.00
Resolution ‘rESn’
1 digit
1 digit
Bargraph start ‘BarLo’
-----
0.00
Bargraph finish ‘BarHi’
-----
100.00
P
button in display mode ‘C—P’
%
%
Tare ‘tArE’
Off
Off
Default configuration can easily be changed on-site.
5.1 Summary of configuration functions
This section summarises each of the main
configuration functions and includes a cross
reference to a more detailed description. Fig 8
illustrates the location of each function within the
configuration menu. The lineariser and the
optional factory fitted alarms are described
separately in sections 6 and 8.3 of this manual.
Display
Summary of function
'FunC'
Indicator function
Defines the relationship between the
4/20mA input current and the indicator
display. May be set to:
‘Std’
Standard linear relationship
‘root’
Square root extraction
‘Lin’
16 segment adjustable
lineariser – see section 5.
See section 5.2
'rESn'
Display resolution
Defines the resolution of the least
significant display digit. May be set to
‘1’, ‘2’, ‘5’ or ‘10’ digits.
See section 5.3
'dP'
Decimal point
Positions a dummy decimal point
between any of the digits or turns it off.
See section 5.4
'CAL'
Calibration of the digital display
using an external current source.
Enables the zero and span of the
indicator to be adjusted using an
external current source such as a
calibrator. When used with an accurate
traceable current source this is the
preferred method of calibration.
See section 5.5
'SEt'
Calibration of display using internal
references.
Enables the zero and span of the
indicator to be adjusted without the
need for an accurate input current or
disconnection from the 4/20mA loop.
See section 5.6
'bAr'
Bargraph format and calibration
Only the BA327E -SS has a bargraph
The bargraph may be conditioned to
start from left, right or centre of the
display, or it may be disabled. When
optional alarms are fitted it can also
display both alarm setpoints and the
measured value.
The bargraph may be calibrated to start
and finish at any value within the
indicator’s calibrated digital display.
See section 5.7
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