10.3.8 Access Setpoint: AcSP
This function controls the parameters in a separate
menu which provides direct access to the alarm
setpoints when the transmitter is in the display
mode i.e. when it is displaying temperature. See
section 10.4 for a full description. This menu
allows an operator to adjust the two alarm
setpoints without having access to the Programme,
Trim or Alarm Menus. A separate security code
may be defined to prevent unauthorised access.
This separate direct access menu is enabled and a
separate security code entered from the 'AcSP'
function in the Programme Menu - see Fig 11. 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.
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 the four digit numerical code press
P
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.
Code 0000 will disable the security code allowing
direct access to the setpoints by pressing the
P
and
Up
buttons simultaneously.
New instruments are supplied with this function
disabled and the security code set to 0000
10.4 Adjusting the alarm setpoints from the
display mode.
Access to the alarm setpoint when the BA578C
transmitter is in the display mode is obtained by
operating the
P
and
Up
push-buttons simultane-
ously - see Fig 12. If the setpoints are not
protected by a security code the alarm setpoint one
'SP1' will be displayed. 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 press-
ing
E
will cause alarm setpoint one 'SP1' to be
displayed. Pressing the
Up
or
Down
button will
toggle the display between 'SP1' and 'SP2'.
Fig 12 Setpoint adjustment from display mode
If an incorrect code is entered, or a button is not
pressed for ten seconds, the transmitter will
automatically return to the display mode.
To adjust an alarm setpoint select 'SP1' or 'SP2'
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 to the next digit. When the required setpoint
has been entered, pressing
E
will return the
display to the 'SP1' or 'SP2' prompt from which the
other setpoint may be selected, or the transmitter
may be returned to the display mode by pressing
E
again.
Direct access to the alarm setpoints is only avail-
able when the menu is enabled - see section 10.3.8
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