Step By Step Operation - TSI Alnor Balometer 6461 Manual Del Usuario

Note: Make a habit of checking the tightness of
this handle each time before use, to be
sure it doesn't loosen while the instrument
is being used to take readings, or while it
is being carried from place to place.
Figure 7—Holding Balometer for measurement
If the instrument has been stored at a temperature
below 68°F (20°C) or above 86°F (30°C) it should
be allowed to stabilize at room conditions
(between 68°F and 86°F) in order to achieve
specified accuracy.
1. Assemble the Balometer as described in the
Preparation for Use section of this manual.
If the Balometer will be carried between
locations during use, the detachable handle
should be used. Until the Balometer is
repacked in its carrying case the handle can
remain mounted.
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STEP BY STEP OPERATION

See Figure 7 for ways that the permanent and
detachable handles help in making measurements.
Low Flow Adapter
The low flow adapter (screen) can be used for
measuring air volumes below 250 CFM, (400
cmh, 120 l/s), but it is strongly recommended that
it be used only when measuring very low flows,
below 125 CFM (200 cmh, 60 l/s).
The low flow adapter is inserted by carefully
pushing it into position against the manifold on the
side which the air will enter. If air will move
through the hood TO the base of the instrument
the adapter goes on the "hood" side of the
manifold. The adapter should be in as close
contact with the manifold as possible, and
nowhere more than 1/8 inch away. Take care not
to distort the manifold mounting in the process of
installing or removing the adapter.
Do not forget to remove the adapter when
measuring flow greater than 250 CFM.
2. Check the Velometer for zero adjustment by
placing the instrument away from any air
flow, setting the range selector to the OFF
position, and verifying that the meter reads
zero. If necessary, use a screwdriver to adjust
the zero screw so that the pointer reads zero.
Although the meter will typically read zero
(within one division) regardless of how the
unit is held, it is best to zero the meter in the
position in which it will be used.
3. Set the range selector to the highest reading in
the desired direction, supply or return. This
technique is to ensure that the meter will not
be damaged by an over range condition.
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