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Operation
Changing Temperature Set Point
1. Press and hold “SEL” button, and then briefly press “SEL” again.
2. Press “RST” to enter security code (055).
3. Press and hold “SEL”.
4. Press “RST” to until the 4-SPT input is reached.
5. The first input is SPSEL, press “RST” to change the input to SP-1.
6. Press “SEL” until the SPT-1 input is reached.
7. In the SPT-1 input, press “RST” (temperature set point will display with a flashing digit).
8. Continue to press “RST” until desired number is reached.
9. Press “SEL” to toggle between digits.
10. Press and hold “SEL” to set and press “SEL” until the end of the program is reached.
High Temperature Protection
All centrifuge components and materials are chosen and designed to withstand temperatures up to
100°C (212°F). Although extremely rare, temperatures inside the centrifuge bowl may exceed the
maximum rated temperature. All components are rated for Class I, Division 2 hazardous locations, but
temperatures beyond 100°C may cause components to malfunction. In the case of runaway
temperature, a manual reset mechanical thermal switch is installed in the lid above the bowl.
This normally-closed limit switch is set to open at 85°C (185°F). Once the switch opens, power to the
dual bowl heaters is shut off. To reset the switch, turn off the “MAIN DISCONNECT” switch. Use a
flathead screwdriver to remove the silver cap. Manually press the button until it clicks back into place.
Turn the “MAIN DISCONNECT” switch on and begin operation as usual.
Timed Operation
The “COUNTDOWN TIMER” display indicates the amount of time remaining on a test. For timed
operation, turn the timer switch to the “ON” position. The unit is preset to 10 minutes as specified by
ASTM D 4007-08. If the countdown time must be changed, the controller must be reprogrammed (see
below for instructions). When the motor reaches the speed set point (determined by the dial position of
the potentiometer), the timer will begin to countdown.
Once the timer is complete, the motor will come to a controlled stop. When the timer switch is turned
off, the motor will run until manually shut down (“PUSH TO STOP” button).
NOTE: The updated temperature controller settings will not be set until the “MAIN DISCONNECT” switch is
cycled off and back on.
NOTE: While the temperature controller is being programmed, the dual heaters are not regulated.
Temperature will begin to rise beyond the set point if left in “program mode” for significant periods. Be sure to
exit all programming as soon as possible.
Call the L-K Industries Tech Helpline if any assistance is required.
