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3.1 DESCRIPTION
When programmed as a timer the BA364D may
be used to measure and display the elapsed time
between external events, or to control external
events via the two optional control outputs. The
maximum timer duration is 99 hours, 59 minutes
and 59 seconds.
The BA364D may be programmed to time up
from zero to a setpoint, or to time down from a
setpoint. Times are entered in hours, minutes
and seconds, but may be displayed in hours,
minutes and seconds or in just hours and
minutes. Elapsed or remaining time is
continuously displayed and a separate display
may be activated to show the timer setpoint ‘SEt
t’. The timer can be started and stopped from
the front panel push-buttons, or by remote
switches or sensors. Similarly, the instrument
may be reset from the front panel, or by closure
of a remote contact.
A grand total time is maintained which can only
be reset from within the programme menu.
3.1.1 Initialisation and loss of power
When the power supply is interrupted all
programme parameters, the displayed elapsed or
remaining time and the grand total time will be
automatically stored in permanent memory. The
instrument may be programmed to turn the two
optional control outputs off when power is
restored, or to return the outputs to their state
prior to the loss of power.
3.1.2 Controls
The BA364D timer is programmed and may be
controlled via four push-button switches which
are located behind the instrument control cover,
or as an option on the outside of the instrument
control cover – see 1.9.4. In the display mode
i.e. when the instrument is timing the switch
functions are:
Description of Switch Functions
Down
When enabled, starts the timer.
See section 3.5.4
Up
When enabled, stops the timer.
See section 3.5.4
E+Down
While these buttons are
pushed, the display will show
the grand total time in hours
and tenths of an hour and the
grand total annunciator will be
activated.
See section 3.5.12
Description of Switch Functions
Down+Up
Resets the timer to zero or to
the set time setpoint (‘SEt t)
when these two push-buttons
are operated simultaneously for
more than two seconds.
Selectable function from
programme menu.
See section 3.5.11
P+Down
While these buttons are pushed
the instrument will display the
firmware and version numbers
plus the programmed function.
P+Up
When enabled, operating these
buttons simultaneously gives
direct access to the set time
setpoint (‘SEt t’) from the
display mode.
See section 3.5.7
3.1.3 Displays
The BA364D timer has two digital displays and
associated annunciators.
Elapsed time
When counting up, total time
display
since timer was started; when
counting down, the remaining
time until SEt t has elapsed.
Display may be formatted as
hh:mm or hh:mm:ss
Set time
Shows set time setpoint (‘SEt t’)
display
on
lower
display.
May be turned
off. See 3.5.9
Reset
Activated while timer is being
Annunciator
reset.
Grand total
Activated while
E + Down
push-
Annunciator
buttons are operated. Grand
total time shown on lower
display.
Control
Activated when optional control
Output
output
is activated.
Annunciators