BEKA BA534D, Manual

Page: 20 / 26

20
8.2.2 Programming and adjustment
When a BA534D is supplied with alarms the main
programme menu is extended as shown in Fig 10.
The two alarm functions appear between the
'LOC-rSEt' and the 'CLr.Gtot' functions and each
alarm may be programmed as a rate or a total
alarm.
For simplicity Fig 10 only shows the
programmable functions on the rate option of
alarm AL1. Alarm 2 and the total options are
identical except that the total alarms do not have
hysteresis.
The following table summarises each of the alarm
programme functions and includes a cross
reference to more detailed information. Again
only the functions on alarm AL1 are listed.
Summary of programmable alarm functions
Display Description of function
'EnbL' Alarm enable
Enables or disables the alarm function
without changing the alarm
parameters.
See section 8.2.3
'tYPE' Type of alarm
Defines whether the alarm operates on
the rate or total display.
See section 8.2.4
'SPr1' Alarm setpoint 1
or Adjusts the alarm setpoint. The
‘SPt1’ alarm is activated when the rate or
total display equals the setpoint.
Note: ‘SPr1’ is displayed for a rate
alarm and ‘SPt1’ for a total alarm.
See section 8.2.5
'HI.LO' Alarm function
Defines whether the alarm has a high
or low function
See section 8.2.6
'no.nc' Normally open or normally closed
output
Determines whether the single pole
alarm output is open or closed in the
non-alarm condition.
See section 8.2.7
'HStr' Hysteresis
Adjusts the alarm hysteresis. Only
available on rate alarms.
See section 8.2.8
Summary of programmable alarm functions
'dELA' Alarm delay time
Adjusts the delay between the display
equalling the setpoint and the alarm
output being activated.
See section 8.2.9
'SIL' Alarm silence time
Defines the time that the alarm output
remains in the non-alarm condition
following acceptance of an alarm.
See section 8.2.10
'AcSP' Access setpoint
Sub-menu that enables direct access
to the alarm setpoints from the display
mode and includes definition of a
separate security code.
See section 8.2.11
8.2.3 Alarm enable: ‘EnbL’
This function allows the alarm to be enabled or
disabled without altering any of the alarm
parameters. To check or change the function
select 'EnbL' from the alarm menu and press
P
which will reveal the current setting. The function
can be changed by pressing the
Up or Down
button followed by the E button to return to the
alarm menu.
Note: The alarms will be automatically disabled
after the rate or total displays have been
recalibrated, or the alarm type has been changed.
Both alarms must therefore be enabled after
calibration changes.
8.2.4 Type of alarm: ‘tYPE’
Alarm 1 and Alarm 2 may both be rate or total
alarms, or one may be conditioned for rate and
the other for total.
To check or change the type of alarm, select
'tYPE' from the alarm menu and press
P which will
reveal the current setting. The function can be
changed by pressing the
Up or Down button
followed by the E button to return to the alarm
menu.
Note: When ‘tYPE’ is changed, the alarm
parameters are automatically set to the default
values and the alarm is disabled. It must
therefore be reprogrammed before use.