BEKA BA538C, Manual

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8.3.11 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. See
section 8.3.12 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 may be enabled and a
separate security code entered from the 'AcSP'
function in the main programme menu as shown
in Fig 10. To change the menu parameters select
'AcSP' from the programme menu and press
P.
This 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.
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. The flashing digit of the code may
be changed by operating the
Up or Down push-
buttons and pressing the P button will transfer
control to the next digit. When the required code
has been entered, press
E twice to 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
8.3.12 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 11. 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 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 11 Setpoint adjustment from the display mode
To adjust an alarm setpoint select 'SPx1' or 'SPx2'
and press
P which will reveal the current setting.
Each digit of the setpoint may be adjusted using
the
Up and Down push-buttons, and the P button
to move control to the next digit. When the
required setpoint has been entered, pressing
E
will return the display to the 'SPx1' or 'SPx2'
prompt from which the other setpoint may be
selected, or the indicator may be returned to the
display mode by pressing
E again.
Note: Direct access to the alarm setpoints is only
available when the menu is enabled - see section
8.3.11