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NOTE: The instrument should be allowed to
stabilize to room conditions in order to achieve
specified accuracy.
1.
If you are using a hood with the unit, assemble
the LoFlo Balometer
in Section 4, "Instrument Setup and Storage."
2.
Turn on the unit using the slide switch located on
the right side of the meter.
3.
When turned on, the LoFlo Balometer
Hood displays the vent closed indicator. Close the
vent on the base by turning the top baffle counter
clockwise.
4.
Select the proper mode for air flow direction,
supply or return.
5.
Place the LoFlo Balometer
the diffuser or grille to be measured.
Handle Button
In 1-point mode, the handle button will freeze the
digital reading and flash the value when it is pressed for
less than three seconds. When the handle button is
pressed for more than three seconds, it switches the
®
LoFlo Balometer
Capture Hood between vent closed
mode and vent open mode.
In 2-point mode, the handle button cycles the
instrument through the 2-point measurement process.
See 2-point mode section for detail.
Auto/Manual Ranging Button
When turned on, the instrument is in auto-range mode.
The user can switch to manual range mode by pressing
the range button. The manual range indicator will
show. By pressing the range button, the meter display
switches to the next volume range. To return to auto-
range mode, press and hold the range switch until the
manual range indicator disappears.
SECTION 6
Getting Started
®
Capture Hood as described
®
Capture
®
Capture Hood over
SECTION 7
Detailed Operation
5
6.
The auto range feature of the LoFlo Balometer
Capture Hood will choose the correct scale and
display the volume rate in the digital readout
section. A quick press on the handle switch will
freeze the display.
7.
Another quick press will unfreeze the display.
8.
For volume rates above 150 cfm (255 m
71 l/s), it is recommended to use the vent open
mode to minimize air flow resistance effects. See
Section 7, "Detailed Operation."
NOTE: Make sure that there are no gaps between
the LoFlo Balometer
surface around the diffuser or grille. Also, make
sure that your body or other objects are not
blocking or diverting the air flow where the air is
exiting (supply) or entering (return). This will affect
the reading.
Changing Measurement Units
To change measurement units:
1. Turn the instrument off.
2. Press and hold the supply/return button and switch
the instrument on at the same time.
3. The display will flash one of the three available
measurement units: cfm, m
4. Press and hold the supply/return button or the
range button to scroll through the measurement
units.
5. When the units you desire are displayed, switch the
instrument off.
6. When you turn the instrument on again, your
chosen units will be displayed.
3
/h,
®
Capture Hood and the
3
/h, l/s.
®
5
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