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9.3.10 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 programmed in 1 second
increments up to 3600 seconds. If a delay is
not required zero should be entered. To
adjust the delay select 'dELA' from the alarm
menu and press P which will reveal the
existing delay. Each digit of the delay can
be adjusted using the Up and Down push-
buttons, and the P button to move to the
next digit. When the required delay has
been entered, press E to return to the alarm
menu.
The alarm annunciator will start flashing
immediately an alarm occurs and continue
for the delay time after which the alarm
output will be activated.
9.3.11 Alarm silence time: SIL
This function is primarily intended for use in
small installations where the alarm output
directly operates an annunciator such as a
sounder. When the alarm silence time is set
to any figure other than zero, the P push-
button becomes an alarm accept button.
After an alarm has occurred, operating the P
button will cause the alarm output to revert
to the non-alarm condition for the
programmed alarm silence time. The
silence time may be adjusted between 0 and
3600 seconds in 1 second increments.
To adjust the alarm silence time select 'SIL'
from the alarm menu and press P which will
reveal the existing time. Each digit can be
adjusted using the Up and Down push-
buttons, and the P button to move to the
next digit. When the required time has been
entered press E to return to the alarm menu.
When an alarm is silenced the alarm
annunciator will flash until the silence time
expires.
9.3.12 Access Setpoint: AcSP
This function controls a separate menu
which provides direct access to the alarm
setpoints when the instrument is in the
operating mode. See section 9.3.13 for a
full description. An operator may therefore
adjust the alarm setpoints without having
access to the programme and alarm menus.
Further protection is provided by a separate
security code.
This direct access menu is enabled and a
separate security code entered from the
'AcSP' function in the main programme
menu. To change the menu parameters
select 'AcSP' from the programme menu and
press P which will display the enable prompt
'EnbL'. Press P again to reveal if the direct
access menu is 'On' or 'OFF'. The Up or
Down buttons 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. Press E twice to return to the
‘AcSP’ prompt in the main menu.
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 the four digit
numerical code press E to return to the
'Enbl' prompt followed by the Up or Down
button to select the access code prompt
'AcCd'. Pressing P will reveal the current
security code. Each digit of the code may
be changed by operating the Up and Down
push-buttons, and the P button to move to
the next digit. When the required code has
been entered, press E twice to return to the
'AcSP' prompt in the Programme Menu.
The default code 0000 will disable the
security code allowing direct access to the
setpoints by pressing the P and Up buttons
simultaneously.
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 two alarm setpoints from the
indicator display mode is obtained by
operating the P and Up push-buttons
simultaneously as shown in Fig 13. If the
setpoints are not protected by a security
code the alarm setpoint prompt 'SPr1' or
'SPt1' will be displayed depending upon
whether a rate or total alarm has been
programmed. If the setpoints are protected
by a security code, 'COde' will be displayed
first. Pressing P again will enable the alarm
security code to be entered digit by digit
using the Up and Down buttons to change
the flashing digit, and the P push-button to
move to the next digit. If the correct code is
entered pressing E will cause alarm setpoint
prompt 'SPr1' or 'SPt1' to be displayed.
Pressing the Up or Down button will then
toggle the display between the two alarm
setpoint prompts.
