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Technical Details
8-1
8
8.1 Theory of Operation
The pump motor consists of an electric motor and a pulley assembly controlled
by a microprocessor and circuit board. Driven by ac power, the motor produces
a torque which drives the pulley assembly. The pulley assembly reduces the
motor output speed and drives the pump. All of the pump motor’s functions
are regulated by the microprocessor and circuit board. You enter information to
the motor via a membrane keypad.
8.2 Design Considerations
Customers commonly desire a pump motor that they can calibrate to obtain
accurate flow rates with a wide variety of tubing materials, sizes, and
durometers. They also want the ability to pump fluid from more than one
source container at the same time. In addition, they may need the freedom to
pump fluid in opposing directions at the same time. Customers also desire a
variety of ways by which to pump their fluid. Above all, they want to carry out
all these processes with a user-friendly piece of equipment.
8.3 Design Solution
The peristaltic pump motor satisfies today’s diverse customer needs. Its
sophisticated software allows customers to calibrate the motor for use with a
wide range of tubing materials, sizes, and durometers, to obtain accurate flow
rates. It can accept two stacked pumps with fluid flowing in the same direction
in both pumps, or one pump on each side with fluid flowing in opposite
direction in the pumps. The pump motor is equipped with user friendly
software and four modes of pumping: RPM, FLOW RATE, TIME, and TOTAL
VOLUME.
8.4 Maintenance
There is no need for any preventive maintenance work. There are no user
serviceable parts inside the peristaltic pump motor. All bearings are pre-sealed
and rated for long life. Do not open the unit, or the warranty will be voided.
The fuse may be replaced from the outside of the unit. Refer to figure 1.2 for the
location. Simply press down on the plastic fuse holder door, and slide it open.
The fuse used by the pump motor is closest to the case. The spare fuse is located
under the word “Press”. Make sure Power is off and the line cord unplugged
when changing the fuse.