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Our technicians use state-of-the-art, regularly calibrated instruments
to measure the actual performance of the HVAC system components.
On a construction/renovation project, this field data is then compiled
into a comprehensive report showing both test one readings and the
final set conditions. For troubleshooting and survey work, the readings
taken of current operating conditions are reported along with recommendations
for corrective action. We have video equipment to document smoke
tests that graphically illustrate air flow patterns, down drafts
and other findings of the field testing.
Below is a partial listing of the instruments used for the testing
and balancing of HVAC systems, along with a brief description of
their function.
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Digital
Tachometer
We have both digital and analog tachometers that are used to
measure rotation on fans, motors and pumps. They are so precise
that they measure the 60Hz frequency of a florescent light bulb.
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Direct
Reading Flow Hood
The Shortridge Direct Reading Flow Hood is our central instrument
because of its accurate and repeatable measurement of air inlet
and outlet capacities. It has a detachable, electronic micromanometer
that measures pressure differentials to four digits and when
attached to a pitot tube, velocity grid or air foil, it measures
lineal air speed. |
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Electronic
Digital Anemometer
This instrument is used to test fume hoods in scientific laboratories
per ASHRAE Standard 110-1995. It provides both continuous or
averaged flow readings. |
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Magnehelic
Gages
While not hi-tech instruments, our magnehelic gauges
provide instantaneous, constant read out of pressure differentials
on air system components. They are particularly suited to setting
up terminal boxes and monitoring plenum pressures during system
modulation. |
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Rotating
Vane Anemometer
The Davis 4" Rotating Vane Anemometer is extensively used
to test sidewall register and exhaust inlet registers. |
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Temperature/Humidity
Recorders
These recorders track temperature and humidity levels over time
allowing us to document system fluctuations. They are particularly
helpful in measuring actual space conditions versus the perceptions
of occupants when addressing complaints. They also graphically
illustrate undesirable operating conditions such as heating
valves opening during unoccupied hours. |
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Ultrasonic
Flowmeter
Our portable, Ultrasonic Flowmeter allows us to test
actual flows of hydronic systems using a non-invasive device.
The sensors are strapped onto pipes filled with fresh water,
seawater or glycol. Field applications include older systems that have
no flow sensors installed, monitoring systems for trends and
peak usage over time, as well as detecting unknown bypass connections,
reversed piping, plugged strainers and improperly sized piping,
valves, etc. |
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