BEKA BA334E, Руководство пользователя, Страница: 17 / 64

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6. CONFIGURATION AND CALIBRATION
The BA334G Rate Totaliser is configured and
calibrated via four front panel push buttons. All the
configuration functions are contained in an easy to
use intuitive menu that is shown diagrammatically in
Fig 10.
Each menu function is summarised in section 6.3 of
this manual and each summary includes a reference
to more detailed information. The sixteen segment
lineariser is described separately in section 7.
Configuration of the isolated pulse output, which is
fitted to all BA334G Rate Totalisers is described
separately in section 6.24. The optional outputs
which when fitted appear as additional functions in
the configuration menu are described in section 10.
All new Rate Totalisers are supplied calibrated as
requested at the time of ordering. If calibration is
not requested, Rate Totalisers will have default
configuration as shown in the following table, but
can easily be re-configured on-site.
Function Display Default
Access code
CodE 0000
Function
FunCtion 5td
Input
inP . tYPE oP . CoL
Debounce
dEbounCE dEFAuLt
Update
uPdAtE 0 . 5
Upper display
di5p-1 totAL
Lower display
di5P-2 on
Decimal point
dP
Rate
0.0
Total
0
K Factor
FACtor 1 . 0
Total scale factor
5CALE . t 1 . 0
Rate scale factor
5CALE . r 1 . 0
Timebase
t-bA5E 5EC
Filter
FiLter 24
Clip-off
CLP-oFF 0
Local total reset
t-rE5Et oFF
Local grand total reset
Gt-rE5Et oFF
Security code
CodE 0000
Note: While the instrument is being configured
totalisation continues so that any flow occurring
during this time is recorded.
6.1 Configuration structure
Fig 9 shows the BA334G calibration structure. The
rate and total display calibrations are independent
which allows the displays to have different
engineering units.
The rate totaliser pulse input is divided by
FACtor
which is usually set to the K-factor of the flowmeter,
thus converting the flowmeter output into
engineering units. When the 16 segment lineariser
Lin
is selected in the Function sub-menu, up to 16
values for
FACtor
may be entered each at a
specified input pulse frequency to compensate for
flowmeter nonlinearity. See section 7.
5CALE-r
is a dividing factor that converts the
output from
FACtor
into the required rate display in
engineering units. e.g. if the output from
FACtor
is
one pulse per litre and the rate display is required
in gallons,
5CALE-r
should be set to 4 . 5461 which
is the number of litres in an imperial gallon.
The timebase
t-bA5E
is a multiplying factor that
determines if the instrument displays flow per
second, per minute or per hour.
The total flow display is independent of the rate
display.
5CALE-t
is a dividing factor that converts
the output from
FACtor
into the required total
display engineering units. e.g. if the output from
FACtor
is one pulse per litre and the total display is
required in thousands of gallons,
5CALE-t
should
be set to 4546 . 1 which is the number of litres in
1,000 imperial gallons.
The BA334G uses ‘real’ decimal points. Moving the
position of a decimal point in a scale factor will
affect the instrument calibration.
Fig 9 Calibration structure