User's Manual

®
Hydraulics Structures Set Operation
4
Couplers
Pressure Sensor Coupler
The pressure sensor coupler has a “T” shape. The shorter arms
of the “T” have a male luer lock at one end and a female luer
lock at the other. The longer arm of the “T” has an inline quick
connector at the end for connecting to the pressure port on a
pressure sensor. Push the inline quick connector onto the pres-
sure port, and turn the quick connector clockwise (left to right)
until the connector locks in place.
Syringe Coupler
The syringe coupler is a length of tubing about 27 cm long with a female luer lock
at each end. For example, the coupler connects one syringe to another, or a syringe
to the hydraulic cylinder. The syringe coupler can also connect to the other cou-
plers and to the valves. The female luer lock screws into a threaded male luer lock.
Extension Tubing
The extension tubing is about 60 cm long with a female luer lock at one end
and a male luer lock at the other. It can be used to increase the distance
between components of the hydraulics structures set.
Valves
Bleeder Valve
The bleeder valve has a stopcock that can be opened and closed to allow
fluid to flow through the valve or not. When the stopcock handle is perpen-
dicular to the tubing, the valve is closed. When the stopcock handle is paral-
lel to the tubing, the valve is open.
Check Valve Assembly
The check valve assembly is a “T” shaped assembly that
has two one-way valves that allow fluid to flow through
the valve in specific directions. For example, when the
check valve assembly is connected to a syringe, fluid can
flow into the cylinder of the syringe through valve A when
the piston is pulled out. When the piston is pushed in, fluid
can flow out of the cylinder through valve B. The arrow on
each valve indicates the direction that fluid may flow
through the valve.
O-Ring Drive Belt
The included O-ring can be used as a ‘drive belt’ when it is
looped from one pulley to another pulley, or from a pulley
to a Rotary Motion Sensor.
Operation
To demonstrate Pascal’s Principle as described in the Theory section, connect the 60 mL syringe to the syringe
coupler. Pull the piston halfway out. Get a 20 mL syringe and pull its piston halfway out. Connect the smaller
syringe to the syringe coupler. Have one person hold the 60 mL syringe and another person hold the 20 mL
syringe. Have each person push in the piston of their syringe. You should notice that it is much harder to push on
Figure 3: Connector onto Pressure Port
Quick ConnectorPressure Port
Figure 4: Luer Locks
Female luer lock
Male luer lock
Figure 5: Bleeder Valve
Open position
Closed position
Valve A
Valve B
Piston
When the piston is
pulled out, fluid goes
through valve A into
the cylinder.
When the piston is
pushed in, fluid goes
through valve B to the
rest of the apparatus..
Cylinder
Figure 6: Check Valve Assembly