36
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. When an alarm is silenced the
BA364D front panel alarm annunciator will flash
until the silence time expires.
To adjust the silence time select 'SIL' from the
alarm menu and press
P
which will reveal the
existing time. The time may be adjusted to
between 0 and 3600 seconds in 1 second
increments. Each digit can be adjusted using the
Up
and
Down
push-buttons, and the
P
button
transfers control to the next digit. When the
required time has been entered press
E
to return
to the alarm menu.
2.6.10 Access Setpoint: ‘AcSP’
This function activates a separate menu that
provides direct access to the alarm setpoints
when the instrument is in the display mode i.e.
counting. See section 2.6.11 for a full
description. An operator may therefore adjust
the setpoints without having access to the
programme and alarm menus. Further protection
may be 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 as shown
in Fig 2.4 To change the menu parameters
select 'AcSP' from the programme menu and
press
P.
This will display the enable prompt
'EnbL'.
Pressing
P
again will 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.
Return to the 'AcSP' prompt in the main menu by
pressing
E
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 numeric 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 then reveal the current
security code with one digit flashing. The code
may be changed by operating the
Up
or
Down
push-buttons and pressing the
P
button to
transfer control to the next digit. Finally press
E
twice to enter the new security code and return to
the 'AcSP' prompt in the programme menu.
Entering code 0000 will disable the security code
allowing direct access to the setpoints in the
display mode by pressing the
P
and
Up
buttons
simultaneously.
New instruments with alarms are supplied with
the security code set to 0000
2.6.11 Adjusting alarm setpoints from the
display mode
Access to the two alarm setpoints from the
instrument display mode is obtained by operating
the
P
and
Up
push-buttons simultaneously as
shown in Fig 2.5. If the setpoints are not
protected by a security code the alarm setpoint
prompt 'SPt1' or ‘SPr1’ will be displayed,
depending upon whether alarm 1 has been
programmed as a total or rate alarm. 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 control to the next digit. If the correct
code is entered pressing
E
will then cause alarm
setpoint prompt 'SPx1' to be displayed. If an
incorrect security code is entered, or a button is
not pressed within ten seconds, the instrument
will automatically return to the display mode.
Once within the menu pressing the
Up
or
Down
buttons will toggle the display between the two
alarm setpoint prompts 'SPx1' and 'SPx2'.
Fig 2.5 Setpoint adjustment from the display
mode
