BEKA BA317NE, Manual

Page: 19 / 40

6.7 Display update interval:
uPdAtE
If the Tachometer display is likely to change rapidly, a
longer interval between display updates may simplify
reading the display. This function allows one of six
different display intervals between 0.5 and 5 seconds
to be selected. The selected display update interval
does not affect the update time of any other
instrument function.
To adjust the update interval select
uPdAtE
from the
configuration menu and press
(
to reveal the current
time. Pressing the
&
or
*
button will scroll through
the six times. When the required interval has been
selected press
)
to enter the selection and return to
the configuration menu.
6.8 Run-time display:
di5P-2
This function turns the run-time display on or off,
although the run-time timer continues to function when
the display is off.
To check the status of the run-time display, select
di5P-2
from the configuration menu and press
(
that will reveal if the run-time display is
on
or
oFF
.
The setting may be changed by pressing the
&
or
*
button followed by the
)
button to enter the selection
and return to the configuration menu.
6.9 Position of the decimal points:
dP
This function positions the decimal point in the
Tachometer speed display. To adjust select
dP
from
the configuration menu and press
(
. The
Tachometer display will be activated and identified by
the display annunciator as RATE. The decimal point,
which may be positioned between any of the digits or
may be absent is positioned by operating the
&
or
*
push button. When set as required enter the
setting and return to the configuration menu by
operating the
)
button.
6.10 Speed scale factor:
5CALE . 5
5CALE.5
is a dividing factor adjustable between 0.0001
and 99999 that enables the Tachometer speed display
to be in the required engineering units. e.g. If a
sensor monitoring a rotating shaft generates 18
pulses per revolution, to produce a Tachometer speed
display in revolutions
5CALE.5
should be set to 18.0.
The units of the Tachometer speed display are pulses
per unit of time. The unit of time is the timebase of the
instrument which is determined by
t-bA5E
which is
described in section 6.11.
To check or change the speed scale factor select
5CALE . 5
from the configuration menu and press
(
which will reveal the existing value with one digit
flashing. The value of the flashing digit may be
changed by pressing the
&
or
*
button.
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 which
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 speed scale
factor has been entered, press
)
to return to the
5CALE . 5
prompt in the configuration menu.
6.11 Timebase:
t-bA5E
The timebase multiplies the Tachometer speed
display by 1, 60 or 3,600 depending upon whether
the Tachometer is required to display speed per
second, per minute or per hour. e.g. RPS, RPM or
RPH. 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
speed per second
tb-60
speed per minute
tb-3600
speed per hour
When the required multiplier is displayed press
)
to return to the
t-bA5E
prompt in the configuration
menu.
6.12 Display filter:
FiLtEr
The digital display filter has two independent
adjustable parameters enabling the Tachometer
speed 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
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