RKI Instruments GD-K77D4X-XX - Manual (Page 7)

Model GD-K77D4X-XX Sample Draw Transmitter • 4
• Select a site that is easily accessible for servicing.
• Select a site where the GD-K77D4X-XX is not likely to be bumped or disturbed.
Make sure there is sufficient room to make wiring and sample line connections at
the bottom of the GD-K77D4X-XX. Also make sure there is sufficient room to
perform start-up, maintenance, and calibration procedures.
• Select a site near the sampling area. The GD-K77D4X-XX is designed to detect a
variety of toxic gases, many of which are easily absorbed in sample tubing. Keep
the sample line length to a minimum. Teflon PTFE tubing is recommended to
minimize sample absorption.
• Use four 1/4” screws through the mounting feet to mount the GD-K77D4X-XX to
a vertical surface. See Figure 3 for the mounting dimensions.
Figure 3: Outline & Mounting Dimensions
Connecting Sample Lines to the GD-K77D4X-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 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 the inlet fitting to the
2.51
8.22
Inlet Fitting
Exhaust Fitting
3/4" Conduit Hub, 2X
9.88
Ø .34, 4X
Tubing Stub
0.85 MAX
11.23
11.75
7.01
1.43