Step 8
Calibrate the rate display
Select calibration of the rate display
using an external current source 'CAL'
from the configuration menu and press
P
The BA354NE will request a 4mA
input by displaying 'ZEro'. Set the input
current to 4.0000mA and press
P
which
will reveal the existing rate display with
one digit flashing. Using the
▼
and
▲
buttons to adjust each digit and the
P
push button to move control
between digits, enter the required zero
display of 0000. Press
E
to enter this
calibration figure and return the
instrument to the 'ZEro' prompt.
Press the
▲
push button
and the
instrument will request a 20mA input by
displaying 'SPAn'. Set the input current
to 20.0000mA and press
P
which will
reveal the existing rate display at 20mA.
Using the
▼
,
▲
and
P
push buttons
enter the required display of 1100.0
Press
E
to enter this calibration figure
and return the instrument to the 'SPAn'
'prompt' and again to return to the 'CAL'
prompt in the configuration menu.
Step 9
Define the timebase
In this example the rate display
represents flow per minute so it is
necessary to set the instrument timebase
to 60. This will divide the rate display by
60 to provide the correct total display.
Select 't-bA5E' from the main menu and
press
P
to reveal the current setting.
Using the
▼
and
▲
push buttons select
'tb - 60' and then return to the
configuration menu by pressing
E
.
Step 10 Define the totaliser scaling factor
In this example the rate display is in litres
per minute but the total display is
required in cubic metres:
5CALE-t
= Units of rate display
Units of total display
There are 1,000 litres in a cubic metre
thus:
= litres
cubic metres
= 1 litre
1/(1000) litres
5CALE-t = 1000
From the configuration menu select
'5CALE-t' and press
P
to reveal the
current five digit dividing factor. Using
the
▼
and
▲
buttons to adjust the
flashing digit, and the
P
button to transfer
control between digits.
The position of the decimal point is
adjusted by repeatedly pressing the
P
button until the decimal point flashes.
The decimal point can then be moved to
the required position by operating the
▼
or
▲
button. When set to 1000.0 press
E
to return to the ‘5CALE-t’ prompt in the
configuration menu.
Step 11 Define totalisation clip-off
In this example totalisation is to be
inhibited below 1% (11 litres / minute) of
maximum flow. To define this cut-off
point select 'CLiP-oFF' from the
configuration menu and press
P
which
will reveal the existing setting. Using the
▼
,
▲
and
P
push buttons enter the
required clip-off of 11.0 and then return
to the 'CLiP-oFF' prompt in the
configuration menu by pressing
E
.
Step 12 Local reset of total display
This example requires that the total
display resets to zero when the
▼
and
▲
buttons are operated simultaneously. To
enable this function select ‘LoC.r5Et’
from the configuration menu and press
P
which will reveal if the function is on or
off. Usint the
▼
or
▲
button toggle the
display to ‘on’ and return to the
configuration menu by pressing
E
.
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