8000D Mixer/Mill
Page 7 of 21 SPEX CertiPrep 8.21.03
SN and Higher
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
until the clamp stops moving. 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 has cycled to zero, and the motor stops, the latch stays locked for about
ten seconds so the clamp will stop moving before the lid can be opened. The latch locks and
unlocks with an audible click. After a run always wait for the click before undoing the manual lid
latch and opening the lid.
NOTE: Never try to force open the lid before the Time-Delay Latch unlocks.
4.4
Control Panel
The four-digit timer is used to set the exact running time of the mill. The 8000D timer’s factory -
set range is 00:01 (one second) to 99:59 (99 minutes and 59 seconds). The default setting, which
always appears when the power is first switched on, is 01:00, or one minute and no seconds.
Electronic Timer - the two buttons underneath the display change the timer setting. The left-
hand button advances the minutes and the right-hand button advances the seconds. To advance a
setting one digit at a time, push a button and release it. If you hold a button down the setting will
advance slowly for a few seconds, then rapidly. The minutes setting will advance from 00 to 99
to 00 again, and the seconds setting from 00 to 59 to 00 again. Any setting other than the default
setting will be retained only as long as the power is switched on. While the mill is running the
timer counts down and displays the minutes and seconds left in a run.
Start Button - Once the timer is set (and the vial is clamped and locked in place, and the lid is
shut and latched) the mill can be started by pushing the Start button. The timer counts down as
the mill begins its run, so that the timer displays the time left to run in a grinding cycle. When
the timer reaches zero (00:00) the motor stops. After a ten-second delay for the clamp to stop
moving, the time-delay latch opens and releases the lid and the timer also re-sets.
Stop/Pause Button - To interrupt (not cancel) a cycle, push the Stop/Pause button once. The
motor will stop, and the display will flash the time left in the cycle; this is the Pause Condition.
During a Pause Condition the lid cannot be opened. This Pause Condition is indefinite, but the
run cycle can once again be resumed at the point where it was stopped, by once again pressing
the Start button. To cancel a cycle in progress, press the Stop/Pause button twice. This will stop
the motor and re-set the timer, and after ten seconds the Time-Delay latch will disengage,
allowing the lid to be opened.
