Drucker Diagnostics Model 842HS Centrifuge - Manual (Page 13)

SAFETY:
Horizon Lid Safety Switch: The Horizon lid is secured to the top of the cabinet by a locking knob
and pawl system. When the knob is rotated clockwise, the pawl grips the underside of the cabinet
opening and prevents the lid from opening. A mechanical stop positions the pawl and prevents it
from rotating completely. When rotated to the stop position, the pawl makes contact with a micro–
switch mounted underneath the cabinet top.The lid safety switch prevents the centrifuge from
operating while the lid is open. The yellow ‘LOCKED’ indicator light on the front of the machine will
illuminate when the lid has been locked properly.
Horizon Lid Safety Interlock System: In addition to the Lid Safety Switch, the Horizon has a
true “0 RPM” lid locking system. The lid safety interlock system keeps the lid locked at all times,
(even during power failure), and requires that the rotor be at rest in order to unlock the lid. The
centrifuge will not allow entry into the rotor chamber unless the centrifuge has power and the rotor
is stopped. To open the lid, make sure that the centrifuge is plugged in and, with the rotor stopped,
press the ‘OPEN / EMERGENCY STOP’ button.
NOTE: After the centrifuge has started spinning, it may be possible to rotate the lid knob
enough to cause the pawl to lose contact with the lid safety switch. If this happens, the
centrifuge motor may lose power, but the lid will still remain locked. If the knob is accidentally
moved and this situation should occur, rotate the knob fully clockwise to its stop position and
the centrifuge will resume operation.
Circuit Breaker: The Horizon is protected with a 4 Amp circuit breaker located at the rear of the
machine mounted to the base. Any electrical short circuit will cause the breaker to cut power to
the machine.
Emergency Rotor Chamber Entry:
In the event of power failure, it may be impossible to unlock
the lid by conventional means. In this case, entry into the
rotor chamber may be made by removing the latch label and
using a pen to manually disengage the locking mechanism
(see photo). Pull the mechanism towards the control panel
and then unlatch and open the lid. If the unit is damaged,
contact your authorised dealer or The Drucker Company.
Calibration and Earth Ground Testing:
It is recommended that the top speed, ground continuity and line leakage be tested every 12
months for continued safe operation. Contact The Drucker Company for further information or
testing availability.
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The Hematofuge 842HS complies with all requirements of CE EN 61000-3-2, -3-3, EN
61000-4-2, -4-3, -4-4, -4-5, -4-6, -4-11, EN 61010-1, -2-020 and UL standard 3101–2–20,
Can/CSA C22.2 No. 1010.1 , Can/CSA C22.2 No. 1010.2.20