BEKA BA537E, Руководство пользователя

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7. CONFIGRATION EXAMPLE
In this example a BA537E Rate Totaliser is connected
to a turbine flowmeter having a K-factor of 105 pulses
per litre with a magnetic pick-off.
The BA537E is required to display rate of flow in
imperial gallons per hour with a resolution of one
gallon and total flow in cubic metres with a maximum
total of 100000 and a resolution of 0.01 cubic metres.
Linearisation is not required. Totalisation is to stop
when the flow rate falls below 10 gallons per hour.
The display is to be updated twice per second.
For this application the operator needs to reset the
total display to zero from the totalisation mode, but
should not be able to reset the grand total.
To
prevent tampering the instrument configuration menu
is to be protected by security code of 1209
8.1 Configuration procedure
The BA537E Rate Totaliser may be configured on-site
without disconnection from the power supply or from
the flowmeter.
Step 1 Enter the configuration menu
Enter the configuration menu by
simultaneously pressing
(
and
)
.
Assuming a security code has not already
been entered the instrument will respond
by displaying
FunCtion
which is the first
function in the configuration menu. See
Fig 7.
Step 2 Select a linear function
With
FunCtion
displayed press
(
to
reveal the function of the Rate Totaliser.
Using the
&
or
*
button select
5td
to
switch off the lineariser and provide a
linear function.
Press
)
to enter the
selection. See 5.4
Step 3 Select the type of input & debounce
Using the
&
or
*
button select
inPut
in
the configuration menu and press
(
which will reveal the sub-menu. Again
using the
&
or
*
button select
inP . tYPE
and press
(
to reveal the existing input.
The Rate Totaliser is required to work with
a magnetic pick-off so using the
&
or
*
button select
CoiL
followed by
)
to return
to the
inP . type
prompt in the sub-menu.
Using the
&
or
*
button select
dEbouncE
from the sub-menu and press
(
. Using the
&
or
*
button select
dEFAuLt
which will provide moderate pulse
edge noise protection. If the Rate
Totaliser is subsequently found to
miscount the noise rejection can be
increased. Enter the selection and return
to the
inPut
prompt in the configuration
menu by pressing the
)
button twice.
See 5.6 and 5.7
Step 4 Select the interval between display
updates
Using the
&
or
*
button select
uPdAtE
in the configuration menu and press
(
to reveal how frequently the Rate
Totaliser display is updated. Using the
&
or
*
push button select
0 . 5
(0.5
seconds i.e. 2 display updates per
second). Enter the selection and return
to the
uPdAtE
prompt in the configuration
menu by pressing the
)
button.
See 5.8
Step 5 Upper display
Using the
&
or
*
button select
di5P-1
in the configuration menu and press
(
to select whether flow rate or total flow is
shown on the upper 8 digit display. The
required maximum total of 100000 with
0.01
resolution can only be
accommodated on the top display.
Therefore using the
&
or
*
button
select
totAL
and press
)
to enter the
selection and return to the
di5P-1
prompt in the configuration menu.
See 5.9
Step 6 Lower display
Using the
&
or
*
button select
di5P-2
in the configuration menu and press
(
which will show if the lower display is
on
or
oFF
. The Rate Totaliser is required to
display both total flow and the rate of
flow so the lower display is required.
Using the
&
or
*
button select
on
and
press
)
to enter the selection and
return to the
di5P-2
prompt in the
configuration menu.
See 5.10
Step 7 Position rate & total decimal points
Select
dP
from the configuration menu
and press
(
. The upper display already
defined as the total display by function
di5P-1
will be activated and identified by
the Total annunciator. Using the
&
or
*
push button position the decimal
point in front of the second least
significant digit to give a total display
resolution of
0 . 00
.
Pressing the
(
button will show the rate
display, but in the upper display position
with the Rate annunciator activated.
Using the
&
or
*
push button position
the decimal point to the right of the least
significant digit so that it is not visible to
give a total display resolution of
1
.
Finally press the
)
button to enter the
selections and return to the
dP
prompt in
the configuration menu.
See 5.11
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