Labconco Logic Vue User Manual page 53

Cut or trim 2 pieces of the PVC board (or equivalent) as needed to block the front
opening on either side of the Direct Inflow Meter's skirt. Both pieces of PVC board must
be the same length such that the open area between the board is in the center of the
enclosure (left-to-right). Tape both pieces to the front sash opening, leaving the
appropriate remaining open portion for the Direct Inflow Meter. Be sure to tape all
edges of the boards.
Before placing the Direct Inflow Meter onto the enclosure, note that outward pressure at
the lower edge of the Front Hatch may open the Hatch inadvertently. The Direct Inflow
Meter may exert slight outward pressure on the Front Hatch. To avoid the Hatch
opening accidentally, tape the Front Hatch securely to the end panel.
Place the Direct Inflow Meter's skirt onto the remaining front sash opening, and tape it
securely to the perimeter of the opening. Use a step ladder or ring stand to support the
far end of the Direct Inflow Meter to prevent it from accidentally falling.
Take five (5) readings for the inflow volume. Average the readings. The inflow volume
to be within the range listed on Table 4-2.
Cabinet Width (Feet)
4'
6'
If the Inflow Volume needs to be adjusted, see
Exhaust Blower speed.
Remove the test equipment, boards, and tape.
Catalog Number
33004xx
(472 – 520 m
33006xx
(698 – 768 m
Section 8: Calibration
53
Inflow Volume Avg. Inflow Velocity
278-306 cfm
3
/hr) (0.51 - 0.56 m/s)
411-452 cfm
3
/hr) (0.51 - 0.56 m/s)
Table 4-2
100-110 fpm
100-110 fpm
to adjust the