BIO RAD PowerPac User Manual page 11

Basic power supply
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STEP
PROCEDURE
6.
Programming a timed run
7.
Optional; available only when
a timed run is programmed.
Power Failure detection.
Caution: Always use the stop key
to terminate a run in progress. Use
of the power switch to terminate a
run in progress is treated as a
power failure and the appropriate
error code is displayed when the
unit is turned back on
8.
Optional
De-activation of change in
resistance feature.
DESCRIPTION
Use the parameter key to select time. The
display will show a zero value. Use the scroll
key to enter the desired time up to 999 min..
If no time is entered the run will continue
until the run is terminated by pressing the
stop key. When 999 minutes is reached, the
clock resets to zero and the run continues.
Note:
• In a timed run the displayed time is the
remaining time. Pressing the pause key
will keep the remaining time. Pressing
the stop key will reset the time to zero.
• In an untimed run the displayed time is the
elapsed time. Pressing the pause key will
retain the elapsed time.
Activating the Power failure detection mode
is possible for timed runs only.
Make sure the parameter key is in time
mode (time LED is lit)
Enter the desired time if not previously
entered
Hold down the stop key for ~2 seconds
until the display shows Pfd. This indicates
the Power Failure Detection is activated.
Note: After completion or termination of a
run, the Power Failure Detect mode is
automatically de-activated. See Section 4.2,
Troubleshooting, for details on Power Failure
Detect error messages.
Certain applications exhibit fluctuations in
resistance that can trigger the change in
resistance error codes. If this is the case,
the change in resistance feature can be
de-activated to allow un-interrupted
completion of a run.
Make sure the parameter key is in
current mode (current LED is lit)
Hold down the stop key for ~2 sec until
the display shows dE9
Note: After completion or termination of a
run the Change in Resistance Detection is
automatically activated.
Caution: De-activating this safety feature
increases the chance of electrical hazard.
5

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