17
Alternatively if the total display is required in
thousand of UK gallons
= 1 litre = 1 litre
1 gallon 1/(4546.1) litres
SCALE-t = 4546.1
The total scale factor SCALE-t is not
dependent on the rate display units of time.
i.e. flow units per second, minute or per
hour. The timebase t-bASE accounts for
these differences.
To check or change the total scale factor
select 'SCALE-t' from the main menu and
press P to reveal the existing setting, one
digit will be flashing. The value of the
flashing digit can be changed by pressing
the Up or Down buttons. When this digit is
correct pressing P will transfer control to the
next digit.
To position the decimal point, move the
flashing digit to the left hand side of the
required decimal point position and
simultaneously press the Up and Down
buttons.
When the required total scale factor has
been entered, press E to store the number
and return to the main menu.
*Note:
The maximum numerical value of
SCALE-t is 65535 irrespective of the decimal
point position. i.e. 6.5535; 65.535; 655.35;
6553.5 and 65535.
6.14 Percentage Clip-off: CLIP-OFF
To prevent errors resulting from the
totalisation of very low flow rates over long
periods, the BA358C rate display can be
forced to zero when the flow rate falls below
a specified value. This threshold may be
adjusted between 0 and 10% of flow for
linear inputs, and between 5 and 10% of
flow for square law inputs linearised by the
root extractor.
To check or change the cut-off point select
'CLIP-OFF' from the main menu and press P
to reveal the current setting. This clip-off
threshold is shown as a percentage of total
flow and may be adjusted in one percent
increments using the Up or Down buttons.
When set as required, press the E button to
enter the revised figure and return to the
main programme menu.
6.15 Local reset of total display:
LOC. rSET
When turned on this function enables the
operator to reset the BA358C total display to
zero by operating the Up and Down push-
buttons simultaneously. To check the
status of the function select 'LOC. rSET''
from the menu and press P. If required
press the Up or Down button to change the
setting, followed by the E button to return to
the main menu.
6.16 Security code: COdE
The calibration and conditioning of the
instrument may be protected by a four digit
security code which must be entered before
access to the programme menu is granted.
New instruments are programmed with the
default security code 0000 which allows
unrestricted access to all programming
functions.
To enter a new security code select 'COdE'
from the menu and press P. The current
security code will be displayed which may be
changed using the Up and Down push-
buttons, and the P button to move to the
next digit. When the required code has
been entered press E to return to the main
menu. The revised security code will be
activated when the indicator is returned to
the display mode.
If the security code is lost, access to the
programmable functions can be obtained by
moving the internal security link to the
override position. The original security code
can then be viewed by selecting 'CodE' from
the main menu and pressing P.
