Model Description pg. 3
Supplied Equip. pg. 4
Available Features pg. 5
Specifications pg. 6-7
Control Panel pg. 8
Setup Location pg. 9
Initial Setup Procedure pg. 9-10
Additional Setup Procedure pg. 10-11
Operation pg. 11
Balanced Loads pg. 12
Tube Holder Configurations pg. 13
Force Chart—12 place pg. 14
Care and Preventative Service pg. 15
Rotor Removal and Installation pg. 16
Safety pg. 17
Emergency Rotor Chamber Entry pg. 17
Troubleshooting pg. 18
Available Accessories pg. 19-20
Warranty pg. 24
WARNING: Care should be taken when handling substances that are known to be toxic,
radioactive or contaminated with pathogenic microorganisms when using this centrifuge for
the safety of both the operator and service personnel. When Risk Group II materials are
used (as identified in the World Health Organization “Laboratory Bio-Safety Manual”), a
Bio-Seal should be employed. More than one level of protection must be provided in the
case of materials of a higher group. The use of flammable or explosive materials as well
as those materials which chemically react vigorously is prohibited.
Model Description:
The Horizon Model 755 is a continuous-duty, electronically-controlled, single or variable-speed, horizontal
laboratory centrifuge with a lid safety interlock system. The unit is controlled by an electronic push-button
timer that is variable from 1 to 30 minutes, for precise spin times and ease of use. Samples can be safely
viewed through the transparent lid. The imbalance detection system safely terminates a run cycle in the event
that a severely imbalanced load is present. Entry into the machine is restricted during operation by the safety
interlock system. The Horizon features a lighted control panel that displays the status of the machine, easily
viewable from a distance. Finally, a cycle counter keeps a count of the total number of machine runs for
servicing and maintenance records.
Intended Use:
General purpose laboratory centrifuge for sample preparation.
3
Supplied Equipment*:
Rev. A
P/N 7711017
Rev. A
The following items come standard with each Horizon 755V-24 Centrifuge:
1. One (1) six-place horizontal rotor
2. Six (6) 100 mm four-place tube carriers p/n 7786022
3. One (1) Operator's Manual (not shown) p/n 7713023
* This rotor is rated for a rotation frequency of 1500 RPM.
Operator’s / Service Manual
4
Available Features:
• Swing-outhorizontalrotordesignincorporatingauniquetesttubeholderthatproduceshorizontally
separated samples while requiring no additional parts, (optional fixed-angle rotors are also available)
‘RUN’ green -lights when power is applied to the motor
‘LATCH’ yellow -lights when the lid is closed and latched
‘UNLOCKED’ red -lights when the lock system is deactivated
• Cyclecountertomonitormachineusage
• Audibleindicatorattheendofeachrun
Specifications: 12-Place
Speed Range (Model 755V):
755V w/12-Place Horizontal Rotor: 500 to 3,200 (± 100) RPM*
755V w/Fixed-Angle Rotors: 500 to 4,000 (± 100) RPM*
Max Speed (Model 755):(This speed is set by the factory, see page 7)with 12-Place Horizontal Rotor 3,600 (± 100) RPM
with Fixed-Angle Rotors 3,600 (± 100) RPM
Maximum capacity:
12-Place Horizontal Rotor: 180 mL (12 x 15 mL)
20-Place Fixed-Angle Rotor: 300 mL (20 x 15 mL)
Overall Dimensions (H x W x D): 9 in. x 14.5 in. x 17 in.
Centrifuge Motor: 1/2 H.P. Brushless DC
Nominal Acceleration Time: 30 seconds
Nominal Braking Time: 15 seconds
Protection Breaker: 4 Amp. re-settable
Timer (electronic): 1 to 30 min ± 1%
Current Requirement: 2.0 A @ 115 VAC
or 1.0 A @ 230 VAC
Voltage Requirement: 115 or 230 (±10%) Volts AC
Frequency: 50 / 60 Hz
Weight: 39 lbs.
* Any use other than those specified by the manufacturer is explicitly prohibited.
Maximum speed shown is for the given rotor with 100mm red tube holders. The use of other tube holders
Force Range (variable speed version): 45 to 1,760 (± 10%) xg
Single Speed Setting:
(This speed is set by the factory, see page 7) 3,000 (± 5%) RPM
Force (@ 3000RPM): 1,600 x g
Maximum capacity: 240 mL (24 x 10 mL)*
300 mL (6 x 50 mL)*
Overall Dimensions (H x W x D): 9 in. x 14.5 in. x 17 in.
Centrifuge Motor: 1/2 H.P. Brushless DC
Nominal Acceleration Time: 30 seconds
Nominal Braking Time: 15 seconds
Protection Breaker: 4 Amp. re-settable
Timer (electronic): 1 to 30 min ± 1%
Current Requirement: 2.0 @ 115 VAC
or 1.0 A @ 230 VAC
Voltage Requirement: 115 or 230 (±10%) Volts AC
Frequency: 50 / 60 Hz
Weight: 39 lbs.
Overall Dimensions (H x W x D): 9 in. x 14.5 in. x 17 in.
Centrifuge Motor: ½ H.P. Brushless DC
Nominal Acceleration Time: 65 seconds
Nominal Deceleration (Breaking) Time: 50 seconds
Protection Breaker: 4 Amp. re-settable
Timer (electronic): 1 to 30 min ±1%
Current Requirement: 2.0 A @ 115 VAC
or 1.0 A @ 230 VAC
Voltage Requirement: 115 or 230 (±10%) Volts AC
Frequency: 50 / 60 Hz
Weight: 39 lbs.
Any use other than those specified by the manufacturer is explicitly prohibited.
* Maximum speed density is 1.15 grams/mL (water density = 1.00 grams/mL).
Control Panel:
Lid Safety
Switch
‘RUN’
Indicator
‘LATCH’
Indicator
Speed
Control
(755V Only)
‘RUN’
Indicator
‘LATCH’
Indicator
‘UNLOCKED’
Indicator
Power
(On/Off)
Button
Speed
Control
(755V
ONLY)
Power
(On/Off)
Button
Lights up when the
machine is in operation,
(power is being applied
to the motor).
Lights up when the lid
has been closed and
latched properly.
Lights up to indicate that
the locking mechanism
has been deactivated,
allowing access to the
rotor chamber.
This button controls the
power to the centrifuge.
The power is on when
the button is illuminated.
Use this input to set the
running speed of the
centrifuge. The speed
may also be adjusted
while the centrifuge is
running.
‘START’
Button
‘OPEN /
EMERGENCY
STOP’
Button
Cycle
Counter
Lid
Safety
Switch
‘UNLOCKED’
Indicator
‘START’
Button
‘OPEN/
EMERGENCY
STOP’
Button
Cycle
Counter
Begins a new run, (the lid
must be closed, see pg. 6).
Allows access into the
rotor chamber by
disengaging the locking
mechanism. Entry is only
permitted when the rotor is
stopped. Pressing this
button during operation will
terminate the run and
unlock the lid after the
rotor has come to a stop.
This counter increments
once for each run of the
centrifuge. This count is
used for both warranty
purposes and for routine
maintenance.
The lid safety switch
prevents the centrifuge
from operating while the lid
is open. If the knob is not
turned completely
clockwise to its stop
position the centrifuge
cannot operate.
Programming functions are
accessed by first opening
the lid safety switch.
8
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