6.4 Position of the decimal point: ‘dP’
A dummy decimal point can be positioned between
any of the digits or it may be absent. To position the
decimal point select 'dP' from the menu and press
P
.
The decimal point can be moved by pressing the
▲
or
▼
push button. If a decimal point is not required it
should be positioned beyond the most or least
significant digit. When positioned as required press
the
E
button to enter the selection and return to the
configuration menu.
6.5 Calibration using an external
current source: ‘CAL’
This function enables the zero and span of the
indicator to be adjusted using an external calibrated
current source. When used with an accurate
traceable current source this is the preferred method
of calibration.
Zero is the indicator display with 4mA input
Span is the indicator display with 20mA input
To calibrate the indicator select 'CAL' from the
configuration menu and press
P
.
The indicator will
display 'ZEro' which is a request for a 4mA input
current. Adjust the external current calibrator to
4.000mA and again press
P
which will reveal the
current zero display. The flashing digit of the
indicator display can be changed by pressing the
▲
or
▼
buttons, when set as required pressing
P
will
transfer control to the next digit. When all the digits
have been adjusted, press
E
to enter the new zero
and return to the 'ZEro' prompt.
Pressing the
▲
button will cause the indicator to
display 'SPAn' which is a request for a 20mA input
current. Adjust the external current calibrator to
20.000mA and again press
P
which will reveal the
existing span display. The flashing digit of the
indicator display can be changed by pressing the
▲
or
▼
buttons, when set s required pressing
P
will
transfer control to the next digit. When all the digits
have been adjusted press
E
t
o enter the new span
and return to the 'SPAn' prompt. Finally press
E
again
to return to the configuration menu.
Notes:
a. The indicator input current must be adjusted to the
required value before the zero and span functions
are entered by pressing the
P
button.
b. Indicators may be calibrated at currents other than
4 and 20mA, withiin the range 3.8 to 21.0mA
providing the difference between the two currents
is greater than 4mA. If these conditions are not
complied with, the indicator displays ‘FaiL’ and
aborts the calibration.
c. If the zero current is greater than the span current
the instrument will be reverse acting i.e. an
increasing input current will cause the display to
decrease.
6.6 Calibration using internal reference: ‘SEt’
Using the ‘SEt’ function the indicator can be
calibrated without the need for an accurate
external current source and without the need to
disconnect the indicator from the 4/20mA
measuring loop.
The indicator’s internal reference is used to
simulate a 4mA and 20mA input current, so the
actual indicator input input current does not have
to be known during calibration.
Zero is the display with a simulated 4mA input
Span is the idisplay with a simulated 20mA input
To calibrate the indicator display select 'SEt' from
the configuration menu and press
P
.
The indicator
will display 'ZEro', pressing
P
again will reveal the
current display at 4mA. The flashing digit can be
adjusted by pressing the
▲
or
▼
buttons, when
the flashing digit is correct pressing
P
will transfer
control to the next digit. When all the digits have
been adjusted, press
E
to return to the 'ZEro'
prompt.
To adjust the display at 20mA, press the
▲
button
which will cause the indicator to display 'SPAn',
pressing
P
will then reveal the indicator’s exisitng
display at 20mA. The flashing digit can be
adjusted by pressing the
▲
or
▼
buttons, when
the flashing digit is correct pressing
P
will transfer
control to the next digit. When all the digits have
been adjusted press
E
t
o return to the 'SPAn'
prompt followed by
E
to return to the ‘SEt’ prompt
in the configuration menu.
6.7 Bargraph format and calibration: ‘bAr’
Only the BA327E-SS has a bargraph
In addition to a five digit numerical display the
BA327E-SS has a 31 segment analogue bargraph
which may be configured to start and finish
anywhere within the indicators numerical display
range.
To configure the bargraph select 'bAr' from the
configuration menu and press
P
.
The indicator will
display 'tYPE', pressing
P
again will reveal the
existing bargraph justification which can be
changed to one of the following four or five options
using the
▲
or
▼
button:
Bargraph starts from
‘LEFt’
Left end of display
‘CEntr’
Centre of display
‘riGHT’
Right end of display
‘AlrSP’
Only with alarms – see section 9.3.14
‘oFF’
Bargraph disabled
When set as required press
E
to return to the
‘tYPE’ sub-function prompt.
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