Pneumatics Troubleshooting amatrols-blackboard
To set the set point of a vacuum switch, the vacuum line leading to the vacuum cup must be ______________.
Closed
________________ level troubleshooting is the process of determining what failed inside a particular component
Component
The first step in troubleshooting a pneumatic system is to ____________.
Identify the symptoms
Before you remove pressure from the system, you should ____________.
Support any overrunning loads
A ___________ is the malfunction you observe in pneumatic system caused by a fault.
Symptom
Rotary actuators have a range of motion of ____________ degrees or less
280
A decrease in flow through a flow control valve can be caused by _____________.
A blocked port
A cylinder that has fast speed may be the result of ____________.
A decrease in load
A continuous input to the PLC from the vacuum switch may be the result of __________.
A short in the electrical wiring
A noisy regulator may be caused by ___________.
Air escaping from the vent port
A complete lockout/tagout program requires that _______ `be locked out for servicing or maintenance
All power sources
The ________ of a vacuum switch deforms based on the amount of pressure applied to it.
Diaphragm
Rotary actuator speed is determined by the _____________ between the two ports.
Differential pressure
A pressure drop measured across a filter indicates a ___________.
Dirty filter element
A vacuum switch converts a sensed pressure into a(n) ___________.
Electrical signal
QEVs boost an actuator's cycle speed by __________________.
Exhausting directly to atmosphere
____________ is a symptom of loose fittings on a rotary actuator"s ports.
External leakage
Actuator drift is a symptom that a QEV's _________.
Gasket is improperly sealed
The __________ of a rotary actuator contains the inlet and outlet ports.
Head
If a non-venting regulator is used to replace a venting regulator, the result may be __________.
Higher pressure
An uneven part surface can cause a vacuum cup to lose its seal because __________.
It allows air to enter the cup reducing the amount of vacuum
Cylinder drift can be caused by _____________.
Leakage
A partial blockage in the vacuum generator will result in ____________.
Low vacuum pressure
The __________ can be used to determine if the DCV's spool is stuck or if the solenoid is not working.
Manual override
An oversized vacuum cup ________ a thin part.
May damage
A partially blocked air filter can cause an actuator to ____________.
Move slowly
A crack in the vacuum generator's muffler may result in ____________.
Noisy operation
A lubricator that is supplying too much oil to the system can be noticed by __________.
Oil drips at the exhaust ports of components
Delayed oil delivery from a lubricator is probably the result of a misadjustment or a ______________.
Partially clogged pick-up tube
When working around pneumatic equipment you should ________.
Remove any rings
A DCV spool that will not return to its neutral position may be the result of a broken ___________.
Return spring
Flow rate measurements are taken using special devices like pilot tubes, orifice plates, and __________.
Rotameters
Flow control valves are used to control actuator speed and ______________________.
Sequence timing
The ________ is used to control the pilot plunger's movement in a pilot-operated DCV
Solenoid coil
To perform an out-of-circuit test, a component can be placed on a __________ to provide a basic circuit to test the component
Test bench
Inserting a pressure gauge into the pneumatic system using a tee creates a test station or __________.
Test point
When performing an electrical lockout/tagout, the last thing the worker should do is ____________.
Test the locked out equipment for power
A sludge collector is used in a pneumatic system to ____________.
Trap rust, dirt, and other contaminants
A lockout valve is a two-position valve that in its closed position blocks the supply line and ____________ downstream air pressure.
Vents
When you first approach a pneumatic system that requires troubleshooting, take the time to ___________ the entire system.
Visually inspect
NPN switches should be used ____________.
When the PLC provides electrical power
