Drucker 642VFD Manuale dell'operatore - Pagina 10

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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.

Transportation

During transportation accessories can become dislodged from the rotor and fall into the

rotor chamber where they can remain unnoticed. In the event that the centrifuge needs to be

transported to another site, make certain that there are no tube holders or accessories in the rotor

or rotor chamber.

Repaired Units

For verification of the safe state of the centrifuge following factory service or repair, refer to the

date on the Factory Calibration located on the back of the centrifuge. This is the date that the

repaired centrifuge was last factory tested and calibrated. For additional servicing information and

technical support, contact Drucker Diagnostics or your authorized retailer.

Safety:

Lid Safety Switch:

The 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. An

indicator light on the front of the machine will light up when the lid has been latched properly.

Lid Safety Interlock System:

In addition to the Lid Safety Switch, the 642VFD, 642VFD-Plus, and 642VES 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/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.

4A Resettable Circuit Breaker

The 642VFD, 642VFD-Plus, and 642VES is protected with two in-line 4A resettable circuit

breakers on the underside of the device. Any electrical overcurrent will trip the breakers, cutting

power to the machine and protecting the internal electronics

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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