User Manual

5 • Model GD -70D4H-XX Sampl e Draw Transmitte r
Figure 3: Outline & Mounting Dimensions
Connecting Sample Lines to the GD-70D4H-XX
1. Connect the hydrophobic filter to the tubing stub on the in let.
If the hydrophobic filter is not used, or if you instal l the hydrophobic filter in a
different location, replace the tubing stub with 1/4’’ x 1/8’’ tubing as described in
“Inlet Fittin g Tubing Stub” on p age 3.
2. Connect a length of sample tubing to the other side of the hydrophobic filter and route
it to the sampling area. If the hydrophobic filter is not used, or if you install the
hydrophobic filter in a different location, route tubing from inlet fi tting to sample
area. Be sure to keep the length to a minimum. Consult RKI Instruments, Inc. for
lengths of more than 20 feet.
CAUTION: A void loops or slumps in the incoming sample line. To reduce r esponse time, keep the
incoming sample line as short as poss ible.
3. Install 1/4 “ O.D. x 1/8” I.D. Teflon PTFE sample tubing to the gas out fitting. Route
NO TE: A ll Dim enions
Shown i n Inches
Inle t F itting
8.22
2.51
Exhaust Fit ti ng
3/4" Conduit
Hub, 2X
9.88
7.01
1.43
8.40
4.83
8.00 MAX
11.75
11.23
Tubing S tub
0.85 M AX
Ø . 34, 4X