BEKA BA368C, Manual

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3.1 DESCRIPTION
When programmed as a timer the BA368C 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 BA368C 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 viewed
by operating the front panel push-buttons, but can
only be reset from within the programme menu.
3.1.1 Initialisation and loss of power
The BA368C timer can be programmed to auto-
reset after initialisation, or to continue timing from
the point at which power was disconnected. When
programmed to continue timing, the two optional
control outputs, if fitted, will be restored to their
state when power was lost.
However programmed, when the power supply is
interrupted all programme parameters, the
displayed elapsed time and the grand total time will
be automatically stored in permanent memory.
3.1.2 Controls
The BA368C timer is controlled and calibrated via
four front panel push-button switches. In the
display mode i.e. when the instrument is displaying
time 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
Description of Switch Functions
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
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 BA368C 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