18
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:
SCALE-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
SCALE-t = 1000
From the main menu select 'SCALE-
t' and press
P
to reveal the current
five digit dividing factor. Using the
Up
and
Down
buttons to adjust the
flashing digit, and the P button to
transfer control between digits, set
'SCALE-t' to 1000.0
The position of the decimal point is
defined by moving the flashing digit
to the second least significant
position and operating the
Up
and
Down
buttons simultaneously.
When 'SCALE-t' has been set to
1000.0 press
E
to return to the main
menu.
Step 11 Define percentage clip-off
Totalisation is to be inhibited at flow
rates below 1% of maximum flow.
To define the clip-off point select
'CLIP-OFF' from the main menu and
press
P
which will reveal the current
setting. The figure can be increased
or decreased using the
Up
and
Down
buttons. After adjustment
press
E
to return to the main menu.
Step 12 Reset the grand total to zero
To reset the grand total to zero
select 'CLr.Gtot' from the main menu
and press
P
which will cause the
instrument to display 'Clr. no'.
Toggle this to 'CLr. YES' using the
Up
or
Down
push-buttons and press
P
which will result in a '0000' prompt.
Using the
Up
, and
Down
buttons and
the
P
button to move to the next
digit, confirm the request by entering
the password 'SurE'. Note S is
entered as 5. Pressing
E
will then
reset the grand total counter to zero
and return the instrument to the 'CLr.
Gtot' prompt in the main menu.
Step 13 Set the security code
Entering a security code prevents
unauthorised access to the
programme functions. Select
'COdE' from the main menu and
press
P
which for a new instrument
will reveal the default code '0000'
with the most significant digit
flashing. Adjust this digit using the
Up
and
Down
buttons to display 1.
Pressing the
P
button will transfer
control to the next digit which should
be set to 2. Finally when the new
code 1209 has been entered, press
E
to return to the main programme
menu.
Step 14 Return to the display mode
Following completion of
programming and calibration, return
the instrument to the display mode
by pressing
E
. All the BA554D
programming functions will now be
stored in permanent memory and
protected from accidental adjustment
by the security code.
