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9.3.10 Alarm silence time:
5iL
This function is primarily intended for use in small
installations where the alarm output directly
operates an alarm annunciator such as a sounder
or beacon. When the alarm silence time, which is
adjustable between 0 and 3600 seconds in 1
second increments, is set to any figure other than
zero, the
(
push button becomes an alarm
accept button. After an alarm has occurred,
operating the
(
button will cause the alarm output
to revert to the non-alarm condition for the
programmed alarm silence time. If the alarm
condition still exists at the end of the silence time,
the alarm output will be reactivated. During the
silence time the indicator alarm annunciator will
flash until the silence time expires or the alarm is
cleared.
If the
FL5H
function, which flashes the indicator
display when an alarm occurs has been enabled, it
will only function when the alarm output is
activated, not during the silence time. See section
9.3.11
To adjust the alarm silence time select
5iL
from
the alarm configuration menu and press
(
which
will reveal the existing silence time. The flashing
digit of the silence time can be adjusted using the
&
and
*
push buttons, and the
(
button to
move control to the other digits. When the
required silence time has been entered press
)
to return to the alarm menu.
9.3.11 Flash display when alarm occurs:
FL5H
In addition to the two alarm annunciators on the
top left hand corner of the indicator display which
show the status of both alarms, this function
provides an even more conspicuous indication that
an alarm condition has occurred.
When enabled, the function alternates the indicator
display between the numerical value and the alarm
reference,
ALr1
or
ALr2
, when the alarm output is
activated. If both alarm outputs are activated, the
alarm references are displayed in sequence.
To enable or disable the function select
FL5H
from
the alarm menu and press
(
which will reveal the
current setting
on
or
oFF
. The function can
changed by pressing the
&
or
*
button followed
by the
)
button to return to the alarm menu.
9.3.12 Access setpoint in display mode:
AC5P
This function enables a separate menu providing
access to the alarm setpoints from the display
mode by simultaneously operating the
(
and
*
push buttons. An operator can therefore adjust the
alarm setpoints without having access to the
indicator configuration menu. Protection against
accidental adjustment of the setpoints when the
indicator is in the display mode is provided by a
separate security code.
This direct setpoint access menu is enabled and
the separate security code entered from the
AC5P
function in the alarm configuration menu as shown
in Fig 16. To change the menu parameters select
AC5P
from the configuration menu and press
(
which will display the enable prompt
EnbL
.
Press
(
again to reveal if the direct access menu
is
on
or
oFF
. The
&
or
*
button will toggle the
display between the two conditions.
If
oFF
is selected, the operator will not have access
to the setpoints from the display mode. Return to
the
AC5P
prompt in the main menu by pressing
)
twice.
If
on
is selected, the operator will have direct
access to the alarm setpoints from the display
mode via a separate optional security code. To
define this four digit security code press
(
to
return to the
Enbl
prompt followed by the
&
or
*
button to select the access code prompt
ACCd
.
Pressing
(
will reveal the current security code.
Each digit of the code may be changed by
operating the
&
and
*
push buttons, and the
(
button to move control to the next digit. When the
required code has been entered, press
)
twice to
return to the
AC5P
prompt in the configuration
menu.
Default code
0000
will disable the security code
allowing direct access to the setpoints in the
display mode by pressing the
(
and
*
buttons
simultaneously. Unless otherwise requested new
instruments with alarms are supplied with this
function disabled and the security code set to
0000
.
9.3.13 Adjusting alarm setpoints from the
display mode.
Access to the alarm setpoints from the indicator
display mode is obtained by operating the
(
and
*
push buttons simultaneously as shown in Fig
17. If the setpoints are not protected by a security
code the alarm setpoint prompt
5P1
will be
displayed. If the setpoints are protected by a
security code,
Code
will be displayed first.
Pressing
(
again will enable the alarm security
code to be entered digit by digit using the
&
and
*
buttons to change the flashing digit, and the
(
push button to move control to the next digit. If the
correct code is entered pressing
)
will cause
alarm setpoint prompt
5P1
to be displayed.
Pressing the
&
or
*
button will toggle the
display between the two alarm setpoint prompts
5P1
and
5P2
.
If an incorrect security code is entered, or a button
is not pressed within twenty seconds, the indicator
will automatically return to the display mode.
