BEKA BA364E, Руководство пользователя

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When this digit has been adjusted as required,
pressing
(
will transfer control to the next digit.
When all the digits have been adjusted pressing
(
will transfer control to the decimal point that may
be positioned between any of the digits, or may be
omitted by moving it to the right of the least
significant digit. When the required rate scale factor
has been entered, press
)
to return to the
5CALE . r
prompt in the configuration menu.
Note:
Adjustment of
5cale . r
will disable the
following ouputs which must be re-enabled
after the adjustment is complete:
Pulse output
Optional Alarm outputs
Optional 4/20mA output
6.19 Timebase:
t-bA5E
The timebase multiplies the rate display by 1, 60 or
3,600 depending upon whether the BA364G Counter
is required to display rate per second, per minute or
per hour. See Fig 9.
To check or change the timebase, select
t-bA5E
from the configuration menu and press
(
which will
reveal the current setting. Pressing the
&
or
*
button will scroll through the three options:
tb-1
for pulses / second
tb-60
for pulses / minute
tb-3600
for pulses / hour
When the required multiplier is displayed press
)
to
return to the
t-bA5E
prompt in the configuration
menu.
6.20 Display filter:
FiLtEr
The digital display filter has two independent
adjustable parameters enabling the rate display
response to be tailored for optimum performance.
The filter parameters are controlled by a two digit
number. The first digit defines the amount of filtering
applied to the display as shown below.
First digit Filter time constant
Seconds
0X 0
1X 1.3
2X 4.3
3X 6.5
4X 8.7
5X 11.3
6X 15.7
7X 20.9
8X 25.2
9X 31.5
The second digit defines the deviation from the
displayed rate at which the filter will be overridden
and the rate display will move rapidly to the new
value.
Second
digit
Magnitude of step
change which will
produce a rapid
response
X0 Off
X1 1%
X2 2%
X3 4%
X4 8%
X5 12%
X6 16%
X7 24%
X8 32%
X9 64%
By careful adjustment of the two parameters a stable
display with an acceptable input step response can
be obtained for most applications.
During commissioning it is recommend that initially
the second digit is set to
0
(off) and the first digit is
adjusted to provide acceptable rate display stability.
The second digit should then be increased until the
selected step size is greater than the noise on the
display signal, at which setting the rate display will
become stable.
These will be the optimum filter
parameters for acceptable rate display stability and a
fast response to a large rate signal change.
To check or change the filter select
FiLtEr
in the
configuration menu and press
(
which will reveal
the current settings with the first digit flashing.
Pressing the
&
or
*
button will adjust the flashing
digit and
(
will transfer control to the second digit.
While making adjustments the filtered rate display is
shown on the lower display so that stability can be
assessed while adjustments are being made. When
set as required, press the
)
button to enter the
revised parameters and return to the
FiLtEr
prompt
in the configuration menu.
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