Guages and instrumentation Flashcards
Types of instrumentation found on CFA appliances
–Delivery pressure gauge
–Inlet pressure gauge
–Flow meters
– Tachometer
–Appliance engine mimic gauges
Pump Gauges
- Pump ____ should be watched _____ while pumping.
- They act as a ____ guide to ________ of the pump, keep the operator ______ of all that is happening.
- Provide for _____ operation for the ______ operator.
Pump Gauges
- Pump gauges should be watched continuously while pumping.
- They act as a reliable guide to performance of the pump, keep the operator informed of all that is happening.
- Provide for safe operation for the branch operator.
- Delivery Gauge:
- This gauge measures ____, above normal ____________ pressure ( ____ ) and is fitted to the ______ side of the pump.
- Delivery Gauge:
- This gauge measures positive, above normal atmospheric pressure ( NAP ) and is fitted to the delivery side of the pump.
Compound Gauge or Pump Inlet Gauge
• constructed to measure both ____ pressures, above ____, and ____ pressures below ____, and is fitted to the _____ side of the pump
Compound Gauge or Pump Inlet Gauge
• constructed to measure both positive pressures, above NAP, and negative pressures below NAP, and is fitted to the inlet side of the pump
Gauge Interpretation
- An _____ in the delivery pressure will cause a ________ in the inlet pressure
- A decrease in the ______ pressure will cause an increase in the ______ pressure
Gauge Interpretation
- An increase in the delivery pressure will cause a decrease in the inlet pressure
- A decrease in the delivery pressure will cause an increase in the inlet pressure
Gauge Interpretation - Inlet
• Pump Inlet Gauge
– The gauge reading is _____ to the height of the _____ (10 kPa per each metre of lift) e.g. when the pump is set up and primed for a 5 m lift, the pump inlet gauge reading will be 50 kPa (note, not delivering water)
– Once delivering water, the negative reading will _______ with an increased lift
– Once delivering water, the negative reading will ____ proportionally with
the increase in ______ through the deliveries
Gauge Interpretation - Inlet
• Pump Inlet Gauge
– The gauge reading is proportional to the height of the lift (10 kPa per each metre of lift) e.g. when the pump is set up and primed for a 5 m lift, the pump inlet gauge reading will be 50 kPa (note, not delivering water)
– Once delivering water, the negative reading will increase with an increased lift
– Once delivering water, the negative reading will increase proportionally with
the increase in flow through the deliveries
Gauge Interpretation - Inlet
blockage on the suction side of the pump
increase in negative reading
Gauge Interpretation - Inlet
blocked suction basket and strainer
ncrease in negative reading
Gauge Interpretation - Inlet
level of water dropping
increase in negative reading
Gauge Interpretation - Inlet
more water being delivered from the pump
increase in negative reading
Gauge Interpretation - Inlet
burst hose
increase in negative reading
Gauge Interpretation - Inlet
loss of prime
zero reading
In general terms, once water is being _______, the higher the RPM of the _____, the _____ the reading on the delivery gauge
In general terms, once water is being delivered, the higher the RPM of the pump, the higher the reading on the delivery gauge
Gauge Interpretation - Delivery
– blockage on the suction side of the pump
decreased reading
Gauge Interpretation - Delivery
– blocked suction basket and strainer
decreased reading
