RKI Instruments GD-70D4A-XX - Manual (Page 8)

5 • Model GD-70D4A-XX Sample Draw Transmitter
Figure 4: Outline & Mounting Dimensions
Connecting Sample Lines to the GD-70D4A-XX
1. Connect the hydrophobic filter to the tubing stub on the inlet by pushing the gray flexible
tubing on the filter onto the stub.
If the hydrophobic filter is not used, or if you install the hydrophobic filter in a
different location, replace the tubing stub with 1/4’’ x 1/8’’ tubing as described in
“Inlet Fitting Tubing Stub” on page 2.
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 fitting to sample area. Be sure to
keep the length to a minimum. Consult RKI Instruments, Inc. for lengths of more than 20 feet.
CAUTION: Avoid loops or slumps in the incoming sample line. To reduce response time, keep the
incoming sample line as short as possible.
3. Attach 1/4“ O.D. x 1/8” I.D. Teflon PTFE sample tubing to the gas out fitting. Route the
opposite end of the tubing to an open area where the sample can safely disperse or to an
exhaust duct.
2.51
8.22
Inlet Fitting
0.85 MAX
Tubing Stub
9.88
Ø .34, 4X
11.23
11.75
3/4" Conduit
Hub, 2X
Exhaust Fitting
7.01
1.43