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ALARMS
SEr = Service interval reached
SAFE = Safety switch has been pressed
STOP = Stop button has been pressed
PROG = Instrument Failure
BAtt = Low power supply voltage (Under 9v)
ALARM LOGIC
When there is an alarm condition the instru-
ment will default to the appropriate channel,
the display will flash and the internal buzzer
will sound 5 times. The instrument will remain
on this channel with the display flashing until
either:
•
another channel is selected and the alarm is
ignored (see below)
•
the alarm condition is rectified
For any of the 2 channels the internal buzzer will
also sound again 5 times if the instrument re-
mains alarming for more than 30 seconds. This
will be repeated again 30 seconds later unless
one of two aforementioned actions have occur-
red.
An alarm condition can be ignored by selec-
ting another channel. If this is done then the
display will flash when the alarming channel is
re-selected. The alarm will also be repeated 30
seconds later if it hasn't been rectified.
The alarms will be prioritised as follows:
•
Stop switch input (channel 2)
•
Chipping speed alarm (channel 2)
•
Service interval (channel 6)
Should 3 alarm conditions exist the highest
priority one will be shown first, if this is then
ignored the instrument should automatically
then indicate the 2nd alarm.
All alarms will operate on the medium 'beep'
rate and the external alarm output will not be
used.
CH27 DMR
HIGH CHIPPING SPEED
The instrument will default to the chipping
speed channel (channel 2), the speed will flash
and the instrument will beep continuously.
O/P's will be disabled.
LOW CHIPPING SPEED
The instrument will default to the chipping
speed channel (channel 2), the speed will flash
and the instrument will beep continuous-
ly. When the speed falls below the MINIMUM
SPEED ALARM, latching is reset.
SERVICE INTERVAL REACHED
If the service interval timer (channel 5) counts
down to zero then the chevron should jump to
channel 5 and emit a beep and flash 'SEr' .
When the chipping unit is stopped, the
chevron should jump to channel 5 and emit a
beep and flash 'SEr' . If the unit is switched on
and the counter is on zero then it should jump
to channel 5, beep and flash 'SEr' .
The service timer can be reset by pressing and
holding the RESET button.
SAFETY SWITCH ALARM
If I/P 2 is open then the display will flash 'SAFE'
and O/P1 and O/P2 will be disabled until the I/P
is closed.
This alarm cannot be ignored.
When the Stop Switch Alarm occurs, latching is
reset.
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