For example, if a BA554E is displaying rate in litres
per minute, setting '5CALE-t' to 4.5461 produces a
total display in UK gallons. Alternatively, setting
'5CALE-t' to 4546.1 will produce a total display in
thousands of UK gallons.
The total is calculated and the display updated
once per second, which defines the resolution of
the total flow display. When total alarms are used
for batching applications, this resolution may define
the accuracy of the system.
5.2 Accessing the configuration and
calibrations functions.
Throughout this manual push buttons are shown
as
P
,
E
,
▼
or
▲
, and legends displayed by the
Rate Totaliser 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 Rate Totaliser’s 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 Rate Totaliser 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 Rate Totaliser 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 7. When returning to the display mode
following recalibration or a change to any function,
the Rate Totaliser will display ‘dAtA’ followed by
‘SAVE’ while the new information is stored in non-
volatile memory.
All new Rate Totalisers are supplied calibrated as
requested at the time of ordering. If calibration is
not requested, Rate Totalisers will be supplied with
the following default configuration:
Default Configuration
Access code ‘CodE’
0000
Function ‘FunC’
‘5td’ Linear
Rate display at 4mA ‘Zero’
0.00
Rate display at 20mA ‘5PAn’
100.00
Resolution ‘rE5n’
1 digit
P
button in display mode ‘C—P’
%
Local reset of total ‘t-rE5Et’
off
Local reset of grand total ‘Gt-rE5Et’ off
Clip off ‘CLIP oFF’
000.00
Timebase ‘t-bA5E’
1
Total scale factor ‘5CALE-t’
1.00
Upper display ‘di5P-1’
Total
Update time ‘uPdAtE’
1
9
