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9.3.12 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
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 may be enabled and a
separate security code entered from the 'AcSP'
function in the main programme menu as shown in
Fig 13. 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
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 14. 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 14 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.
