BEKA BA334E, Руководство пользователя, Страница: 42 / 64

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10.3.4 Alarm enable: EnbL
This function allows the alarm to be enabled or
disabled without altering any of the alarm
parameters. Using the
&
or
*
push button select
AL1
or
AL2
from the configuration menu and
press
(
to access the alarm sub-menu. Press the
&
or
*
button until
EnbL
is displayed followed
by
(
which will reveal if the function is
on
or
off
.
The setting can be changed by pressing the
&
or
*
push button followed by the
)
button to return
to the alarm sub-menu.
10.3.5 Type of alarm:
tYPE
Alarm 1 and Alarm 2 are totally independent, both
may be rate or total alarms, or one may be
conditioned for rate and the other for total.
Using the
&
or
*
push button select
tYPE
from
the selected alarm sub-menu and press
(
to check
or change the function. The
&
or
*
push button
will toggle the selection between
rAtE
and
totAL
,
when set as required press the
)
button to return
to the alarm sub-menu.
Note: When
tYPE
is changed, the alarm
configuration is automatically reset to the default
values and the alarm is disabled. It must therefore
be reconfigured before use.
10.3.6 Setpoint adjustment:
5P1x
&
5P2x
The rate alarm setpoints
5P1r
and
5P2r
may be
positioned anywhere between
000000
and
999999
and the total alarm setpoint
5P1t
and
5P2t
anywhere between
00000000
and
99999999
.
All the setpoints are adjusted in the same way, for
example to adjust the setpoint of Alarm 1 which has
been configured to operate on the rate display.
Using the
&
or
*
push button select
5P1r
in the
AL1
sub-menu and press
(
which will reveal the
existing setpoint with one digit flashing. The
required setpoint can be entered using the
&
or
*
push button to adjust the flashing digit and the
(
button to transfer control to the next digit. When
set as required press
)
to enter the value and
return to the
5P1r
prompt in the alarm 1 sub-menu.
10.3.7 Alarm function:
Hi. Lo
Alarm 1 and Alarm 2 are totally independent, both
may be Hi or Lo, or one may be conditioned as a Hi
alarm and the other as a Lo alarm.
Using the
&
or
*
push button select
Hi.#Lo
from
the selected alarm sub-menu and press
(
to check
or change the function. The
&
or
*
push button
will toggle the alarm function between
Hi
and
Lo
,
when set as required, press the
)
button to return
to the
Hi. Lo
prompt in the alarm sub-menu.
10.3.8 Alarm output status:
no . nC
Each single pole alarm output may be open or
closed in the non-alarm condition. When the
BA334G power supply is turned off or
disconnected, the alarm output(s) will open
irrespective of whether normally open or normally
closed outputs have been selected. Therefore
when designing an alarm system normally closed
nc should be selected so that the output opens
when an alarm occurs or if the power supply fails.
Using the
&
or
*
push button select
no,nC
from
the selected alarm sub-menu and press
(
to
check or change the function. The
&
or
*
push
button will toggle the contact status between
no
and
nC
, when set as required, press the
)
button
to return to the
no,nC
prompt in the alarm sub-
menu.
10.3.9 Hysteresis:
H5tr
Hysteresis is only available on rate alarms so the
H5tr
function only appears in the configuration
sub-menu when alarm
tYPE
has been set to
rAtE
.
During configuration hysteresis is shown in the
units of rate previously configured for the rate
display.
Using the
&
or
*
push button select
H5tr
in the
selected alarm sub-menu and press
(
which will
reveal the existing hysteresis with one digit
flashing. The required hysteresis can be entered
using the
&
or
*
push button to adjust the
flashing digit and the
(
button to transfer control
to the next digit. When set as required press
)
to enter the value and return to the
H5tr
prompt in
the alarm sub-menu.
e.g. A Rate Totaliser configured to display a flow of
0 to 5000, with a high alarm set at 4000 and
hysteresis of 100 will perform as follows:
High alarm will be activated when flow
equals or exceeds 4000, but will not reset until
the flow falls below 3900.
10.3.10 Alarm delay:
dELA
This function enables activation of the alarm output
to be delayed for a fixed time following the alarm
condition occurring. The delay can be set in 1
second increments up to 3600 seconds. If a delay
is not required zero should be entered.
To adjust the delay select
dELA
using the
&
or
*
push button in the selected alarm sub-menu and
press
(
which will reveal the existing delay time
in seconds with one digit flashing. The required
delay time can be entered using the
&
or
*
push button to adjust the flashing digit and the
(
button to transfer control to the next digit.
When set as required press
)
to enter the value
and return to the
dELA
prompt in the alarm sub-
menu.