SPEX SamplePrep 8000 Series - CE Safety Features; Control Panel

8000M Mixer/Mill
Page 8 of 27 SPEX SamplePrep LLC January 2010
4.3 CE Safety Features
CE directives require that electricity to the motor and timer be interrupted whenever the lid is
open, and that the clamp arm must have stopped completely before the lid can open.
Safety Interlock: The Safety Interlock cuts off power when the lid is opened; the switch is under
the lid on the upper right-hand side. Do not disconnect or damage this switch!
Time-Delay Latch: The Time-Delay Latch keeps the lid latched while the mill is running, and for
5 seconds after the end of the run. The Time-Delay Latch consists of two pins, one on either
side of the manual lid latch, powered by a solenoid to engage two holes in the lid. When the
mill is started the Time-Delay Latch locks the lid immediately, and there is a delay before the
motor starts. When the timer reaches zero at the end of a run, the motor stops, the timer
displays RUN COMPLETE, and the latch stays locked for 5 seconds. At the end of 5 seconds the
latch unlocks with an audible click, and the timer re-sets.
NOTE: Never try to force open the lid before the Time-Delay Latch unlocks.
4.4 Control Panel
4.4.1 Digital Timer
The timer includes a minutes: seconds numerical display; push-buttons for the start, stop and
pause functions; and buttons to change the timer setting. The display indicates the
programmed grinding time when the mill is not running: 3:00 means the Mixer/Mill is
programmed for a 3-minute run. During a run the timer counts down the time remaining in 5-
second increments: 2:05, 2:00, 1:55, etc. The time is displayed in minutes and seconds; for
example, 1:30 equals one minute and thirty seconds.
Time is programmed up or down, in 5-second increments, by pressing the up/down buttons
below the timer display.
The timer display also includes three status screens:
PAUSED is displayed when the pause button has been pressed;
RUN COMPLETE is displayed for 5 seconds after the run is over;, and
ERROR: LATCH FAILURE is displayed when the lid interlock cannot engage.