Bio-Rad PowerPac™ HC High-Current Power Supply - Manual (Page 12)

STEP PROCEDURE DESCRIPTION
2. Editing Use the cursor keys and values keys to
change parameters. For multiple-step
runs, future steps may be accessed and
changed, yet the original number of
steps cannot be changed.
3. Resume the run Resume the run by pressing the
start/pause key again.
3.3 Ending a Run
A run may be terminated in several ways: by user intervention, automatically if time was
programmed, or due to a power failure (if power failure detection (PFd) is not enabled).
The display will indicate how the run was ended as well as its final parameters.
Run MESSAGE EXPLANATION
Timed or Run Stopped Run manually stopped by pressing the
continuous stop key
Timed Run Completed Timed run ends automatically
Timed Run Completed Run ends automatically, a power failure
PFd ON after power fail occurred during the run which was
resumed automatically.
Timed or Stopped after Run manually stopped by pressing the
continuous power fail stop key, a power failure occurred during
PFd ON the run which was resumed automatically.
PFd OFF Aborted after A power failure occurred and the run was
power fail terminated.
When the stop key (or any key) is pressed again, the original settings will appear
and the PowerPac is ready to start the run again (except after a power failure with
PFd off. See Troubleshooting for details). Changes made during Pause mode will
be lost.
3.4 Changing System Defaults using the Setup Menu
The setup menu allows the user to activate the automatic power recovery function,
turn off the rapid resistance change safety function, turn off the alarm, and adjust
the display contrast.
Power Failure Detection (PFd)
The default setting for Power Failure Detection (PFd) is OFF. If a power failure (or
multiple power failures) occurs during a run when PFd is ON, the PowerPac HC
will automatically resume the run when power is restored. This occurs whether the
run is timed or continuous. After the run has been completed or stopped, PFd is
reset to its default setting, OFF.
Note: The PowerPac HC cannot distinguish between a power failure and being
turned off at the power switch. If PFd is ON, and the PowerPac HC is turned off at
the power switch during a run, the power supply will resume the run when turned
back on, possibly creating an unsafe condition. Therefore, it is important always to
stop a run before turning off the power supply.
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