Drucker Diagnostics QBC Horizon 755VES Centrifuge (120V, 60Hz) - Manual (Page 14)

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Section 4
CENTRIFUGE OPERATION
4.1 GENERAL PROCEDURES
Before starting the QBC Capillary Centrifuge, be sure the rotor cover is installed and the lid is closed and latched.
The centrifuge will not start unless the lid is latched.
• To start the 5-min spin, press and release the
”ON/OFF” button on the front deck of the centrifuge
(Figure 4-1). The rotor will begin accelerating until it
stabilizes at the design speed. See Section 4.5 for
sequencing of ‘POWER’ and ‘SPEED’ indicator lights.
• Spin time is fixed at 5 min and is not adjustable. After 5-min spin, 15-20 s are required for the rotor to
decelerate to a full stop, at which time the lid latch unlocks.
• To stop the centrifuge any time during a spin, press and release the “ON/OFF” button. Note: After
completing any spin cycle (full or interrupted) the timer is automatically reset to zero.
4.2 BETWEEN-SPIN TIME DELAY
Since the QBC test method depends upon proper cell layering in the hematology and QBC Malaria Test tubes,
blood sampled must be protected from excessive heat buildup in the rotor compartment, which may adversely
affect cell layer formation. Accordingly, between successive spins be sure to wait the appropriate time specified
below. IMPORTANT: During each between-spin rest, be sure the rotor cover is removed and the rotor empty.
4.2.1 QBC Hematology Tubes
• If room temperature is 24 ºC or less (≤ 75 ºF), wait 1 min between spins.
• If room temperature is 25 - 28ºC (75 - 82 ºF), wait 3 min between spins.
• If room temperature is 29 - 30ºC (84 - 86 ºF), refer to the table below.
• If room temperature is 31 - 32 ºC (88 - 90 ºF), wait 30 min between spins.
Note: During QBC Hematology tests using standard QBC tubes, room temperature should not
exceed 32 ºC (90 ºF).*
*Important: For room temperature specifications: consult the package insert of the disposables in use in your laboratory.
CAUTION
TO PREVENT PERSONAL INJURY OR
DAMAGE, NEVER LEAN ON, PICK UP,
OR TILT THE CENTRIFUGE WHILE IT IS
OPERATING. NEVER REMAIN WITHIN
THE CLEARANCE ENVELOPE DEFINED
IN SECTION 3.4 OF THIS MANUAL
LONGER THAN NECESSARY FOR
OPERATIONAL REASONS.
Between
1st & 2nd Spins
Between
2nd & 3rd Spins
Between
3rd & 4th Spins
Between
4th & 5th Spins
Above 5 Spins
3 min. 6 min. 9 min. 12 min. 15 min.
Figure 4-1. Detail of ON/OFF Button
and POWER/SPEED LED’s.