Safety; Emergency Rotor Chamber Entry; Calibration And Earth Ground Testing - Horizon Fitness 853VES Operator's Manual

The Horizon model 853 complies with all requirements of UL's Electrical Equipment for Measurement,
Control, and Laboratory Use; Part 1: General Requirements, UL 61010-1, Issued: 7/12/2004, Ed: 2nd,
Rev: 10/28/08; Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use
Part 1: General Requirements, CSA/C22.2 #61010-1, Issued: 7/12/2004, Ed: 2nd

Safety:

Horizon Lid Safety Switch: The Horizon lid is secured to the top of the cabinet by a latching 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 'LATCHED' indicator light on the front of the machine will illuminate
when the lid has been latched 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 authorized
dealer or Drucker Diagnostics.

Calibration and Earth Ground Testing:

It is recommended that the top speed, ground continuity and line leakage be tested every two years
for continued safe operation. Contact Drucker Diagnostics for further information or testing availability.
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