Drucker Diagnostics Model 755 Centrifuge - Manual (Page 11)

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2. Change the Run-Time Preset:
NOTE: The centrifuge must be plugged in and the lid must be opened to
access programming functions!
a. Push and hold both the ‘START’ and ’OPEN / EMERGENCY STOP’
buttons for approximately three (3) seconds. The ’LATCH’ indicator light
will begin to flash; indicating program mode. Release the two buttons.
b. Press the ‘START’ button once for each minute of desired run time.
The ‘RUN’ indicator light will flash once for each entered minute.
c. Press the ‘OPEN / EMERGENCY STOP’ button to save the change and
exit programming mode.
d. If desired, use the “verify the preset time” procedure to confirm that the
adjustment is correct.
Operation:
NOTE: Follow the initial setup procedure on page 5 before initial operation.
1. Plug the centrifuge into an approved 115 Volt A.C., 50/60 Hz. outlet.
2. Push the ‘OPEN / EMERGENCY STOP’ button and then open the lid.
3. Place the test tube samples into the tube carriers. Be sure to follow the rules for
balanced loads. See next page for assistance.
4. Close the lid and turn the lid knob clockwise to its complete stop position. The
’LATCH’ indicator light should turn on to indicate that the latch is closed properly.
If the lid knob is not completely latched, the ‘LATCH’ indicator light will not turn
on and the centrifuge will not operate!
5. Turn on the machine by pushing the ‘START’ button on the control panel.
6. The centrifuge should begin to spin. The ‘RUN’ indicator light should illuminate.
IF A PROBLEM IS FOUND DURING A SPIN THAT REQUIRES THE CENTRIFUGE
TO SHUT DOWN, PRESS THE ‘OPEN / EMERGENCY STOP’ BUTTON !
7. The run indicator light will begin to flash when one minute remains in the cycle.
8. After time has elapsed, the ‘RUN’ indicator light will extinguish and the rotor will
brake to a complete stop.
9. The ‘UNLOCKED’ indicator light will illuminate, a beeper will sound and the
locking mechanism will disengage allowing entry into the rotor chamber. If it
does not, refer to page 12 on troubleshooting.
10. Turn the lid knob counter-clockwise and open the lid.
11. Remove the samples.
12. If the machine re-locks before the samples are removed, press the ‘OPEN / EMERGENCY STOP’
button to unlock the lid for an additional fifteen (15) seconds. Repeat if necessary.