Undertemp Shutdown; Cycle Complete; Power Failure - Thermo Scientific SHKE8000 Series Maintenance Manual

Section 2
Operation

Undertemp Shutdown

Cycle Complete

Power Failure

2-8 Model SHKE8000 Series Shakers
Undertemp Shutdown alerts the operator
that the chamber temperature has
dropped below the Undertemp setpoint
by a few tenths of a degree. The Undertemp Shutdown message displays
and the refrigeration turns off, but the platform and blowers continue to
operate.
In the alarm state, the audible alarm is silenced by pressing the Silence
button, but will ring back in about 15 minutes if the alarm condition is
still present. The screen message and warning lights continue until the fault
is corrected. Then, the alarm message is cleared by pressing the Silence
button.
Cycle Complete alerts the operator that the
end of the count-down running time has
been reached. The Cycle Complete
message displays and the shaker stops.
Pressing the Silence button clears the message from the display screen.
Power Failure alerts the operator that
electrical power to the shaker was
interrupted, then restored during shaking.
While the system returns to normal operation when power is restored, the
alarm message remains and the audible tone continues to sound. Both the
display message and the audible tone are cleared by pressing the Silence
button.
Note The alarm will not occur if the power failure is less than 15 seconds
in duration.
s
If power is interrupted for two hours or more while the Shaker is turned
on but not shaking, a Power Fail alarm will occur. The purpose of the
alarm in this case is to alert the user that an extended duration power
failure occurred during the Hold interval after a timed shaking operation,
or during a period of incubation only. This alarm will also occur any time
the Shaker is turned on after an extended off period greater than 2 hours
(such as when the unit is shipped from the factory, or when it is returned
to use after a period of storage).
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