ADM-870 05/23/08
28
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. The foam packing and carton should be saved for this purpose.
The base assembly and 2'x2' top assembly will arrive already assembled as a unit and packed as shown in
Figure 10.2. 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 10.1. 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 on 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 CHANNELS
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). Each top is attached to its 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 SUPPORT ASSEMBLY
The top support assembly and support dowels are assembled as shown in Figure 10.3. Position the 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 (see Figure 10.4).
Summary of Contents for Airdata ADM-870
Page 25: ...ADM 870 05 23 08 21 6 4 VELGRID ASSEMBLY...
Page 34: ...ADM 870 05 23 08 30 FIGURE 10 2 FLOWHOOD IN CASE FIGURE 10 1 FRAME STORAGE...
Page 35: ...ADM 870 05 23 08 31 FIGURE 10 3 FLOWHOOD ASSEMBLY...
Page 37: ...ADM 870 05 23 08 33 FIGURE 10 7 1X5 FRAME ASSEMBLY FIGURE 10 8 3X3 FRAME ASSEMBLY...
