General Description - vectus ALNOR Balometer Jr. Manuel Du Propriétaire

Figure 1: Typical usage
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GENERAL DESCRIPTION

The Alnor Balometer Jr. is designed to assist you in making rapid and
accurate measurements of air flow in heating, ventilating and air
conditioning systems. The Balometer Jr. directly reads average standard
air flow rate, for either supply or return diffusers, on the ceiling, wall or
floor. The use of this instrument eliminates the need for multipoint
velocity traverses, the resulting averaging and area calculations, as well
as the use of K factors.
In use, air to be measured is captured by the hood assembly and then
directed past a square manifold which senses flow at 16 points. The
manifold is connected through the range selector to an Alnor Velometer
Jr. The meter is available in traditional units (cubic feet per minute
(cfm)*), or either of two metric units: cubic meters per hours (cmh),* or
liters per second (l/s).* The Balometer Jr. is capable of reading flows up
to 1400 cfm (2400 cmh, 660 l/s). The system is designed so that air flow
is sensed at either supply or return diffusers with equal accuracy.
A single knob to select both flow direction and range provides you
control of the Balometer Jr. for either supply or return diffusers on
ranges of 100 to 600, and 400 to 1400 cfm (200 to 1000, and 800 to 2400
cmh; 50 to 290, and 200 to 660 l/s). A LoFlow range is also available
which allows the instrument to read in the range of 0 to 200 cfm (0 to
340 cmh, 0 to 95 l/s) by using the included LoFlow adapter screen.
For increased flexibility, an optional 16" x 16" hood is available for
work with small diffusers or where the standard 2' x 2' hood will not
conveniently fit.
Throughout this manual, the units cfm, cmh and l/s are used for simplicity. Note,
*
however, that the Balometer Jr. actually reads in standard cubic feet per minute (scfm),
standard cubic meters per hour (scmh), or standard liters per second (std. l/s). See the
Specifications section for more information.