ADM-880C 07/20/09
43
10.0 FLOWHOOD ASSEMBLY
10.1 UNPACKING
The FlowHood case has been specifically designed for the most efficient storage and handling of the FlowHood unit and
its accessories. Note the arrangement of the various items as you unpack the unit. Especially note the placement of the
foam cushioning around the instrument, and the orientation of the meter face toward the side of the case. The FlowHood
should be packed in exactly the same
manner whenever it is returned for recalibration. Save the foam packing and carton for this purpose.
The base assembly and 2'x2' top assembly will arrive already assembled as a unit and packed as shown in Figure 10.1.
The handle assembly, accessory tops, and support dowels are enclosed in the built-in storage compartment at the rear of
the carrying case. The frame channels for the accessory top assemblies are stored at the bottom of the carrying case
beneath the frame storage retainers as shown in Figure 10.2. The top support assembly is stored in the top of the base
assembly just above the grid. The legs have been folded upward, and the curved sections at the bottom of the legs have
been inserted into the first and the third holes of the corner tubes of the base. The head of the support assembly should
be positioned toward the back of the base assembly. The four spring rods are positioned downward, so that they do not
directly contact the flow sensing grid. Foam packing, cloth skirts and accessories should not be stored on top of the grid.
10.2 FRAME ASSEMBLIES
FlowHood system kits include frames for up to six standard top sizes. Custom top sizes are available upon request. The
2'x2' and 14"x14" top frames are assembled and stored as complete units. The 2'x4', 1'x4', 1'x5', and 3'x3' frames use
interchangeable parts to construct any of the four sizes. Refer to Figures 10.4 through 10.8 to determine the frame channels
needed to assemble any of the standard size frames. Each frame corner section utilizes an eyelet and slot arrangement
which self-locks into a similar eyelet and slot on the corresponding frame channel, when the two pieces are slid together.
Side extension channels are joined together by a thumbnut and splice angle arrangement.
The individual frame pieces are stamped with a frame number, as shown circled below. A corresponding red part number
label is glued to each frame piece.
1'x4'
Use two part no. 141
â
, two part no. 142
ã
, and two part no. 143
ä
frames.
2'x4'
Use two part no. 141
â
, two part no. 142
ã
, and two part no. 244
å
frames.
1'x5'
Use two part no. 141
â
, two part no. 142
ã
, two part no. 143
ä
and two part no. 155
æ
frames.
3'x3'
Use four part no. 141
â
, and four part no. 336
ç
frames.
Frame pieces should be stored in the frame storage retainers at the bottom of the carrying case when not being used. This
will help to avoid damage or loss.
10.3 FABRIC TOPS
The top size has been stamped on each FlowHood fabric top (the 2'x2' top has been imprinted with the FlowHood logo).
The desired top is attached to the matching frame assembly by pressing the corded hem of the top into the U-shaped
retention channels on the outside of the frame assembly. After the top is attached to the frame assembly, the similarly
corded hem on the lower edge of the fabric top is pressed into the retention channels on the upper edge of the base
assembly. The seams of the fabric top must always be placed at the corners of both the frame and base assemblies.
10.4 TOP SUPPORT ASSEMBLY
The top support assembly and support dowels are assembled as shown in Figure 10.3. Position the top support assembly
so that the spring rods are at the top. Swing the long rods around and down, into the position shown, and insert the ends
of the rods into the center hole of the corner tubes of the FlowHood base. The rod ends may be moved upward or
downward as needed to control the tightness of the fabric top. The support dowels can now be slid over the ends of the
spring rods.
The location and correct combinations of frames, support dowels, dowel extenders and frame support cups to be used with
each size are shown in Figures 10.4 through 10.8. The 8.5" dowel extenders are used with the 23.5" fiberglass support
dowels when necessary to adjust for variations in frame size.
The 2'x2', 2'x4' and 1'x4' tops do not require dowel extenders. When using the 2'x2' frame, insert the support dowel end
pins into each corner bracket of the 2'x2' frame assembly as shown in Figure 10.4. The dowel end pins are inserted into
the
outer
set of frame support cups when assembling a 1'x4' top and into the
inner
set when assembling a 2'x4' top as
Summary of Contents for AIRDATA ADM-880C
Page 42: ...ADM 880C 07 20 09 37 FIGURE 6 3 VELGRID ASSEMBLY...
Page 50: ...ADM 880C 07 20 09 45 FIGURE 10 1 FRAME STORAGE FIGURE 10 2 FLOWHOOD IN CASE...
Page 51: ...ADM 880C 07 20 09 46 FIGURE 10 3 FLOWHOOD ASSEMBLY...
Page 53: ...ADM 880C 07 20 09 48 FIGURE 10 7 1X5 FRAME ASSEMBLY FIGURE 10 8 3X3 FRAME ASSEMBLY...