RKI Instruments GX-2012 Manual - Manual (Page 38)

30 • Measuring Mode, Normal Operation GX-2012 Operator’s Manual
page 19.
2. Connect the purge tee fitting to the GX-2012’s quick connect inlet fitting.
3. Insert the sample port into the flowing gas. The vent port will allow any
excess gas to release to the atmosphere to avoid damage to pump or
sensors.
Figure 15: Purge Tee Fitting
Using the Dilution Fitting
The external dilution fitting is a 1:1 dilution fitting. It is normally used when
it is necessary to introduce air into a sample that has no oxygen or a very low
level of oxygen, such as a nitrogen purged sample. It can also be used when
one of the target gas levels in the sample area will likely be present in a
concentration above the detection range for that gas. Since the fittings
partially consist of unplated brass, they are not appropriate for detection of
elevated levels of H
2
S.
1. Start up the GX-2012 as described in “Start Up, Normal Mode” on
page 19.
2. Install the dilution fitting to the GX-2012’s quick connect inlet fitting.
3. Connect the tapered rubber nozzle or the sample hose to the GX-2012’s
quick connect inlet fitting.
4. If a sample hose is used, screw the probe onto the sample hose’s threaded
fitting.
5. Monitor the sampling area.
GX-2012 Inlet
Pressurized
Stream
Sample Port
Excess
Pressurized
Sample
Vent Port