EAGLE 2 Operator’s Manual
Standard Accessories • 21
EAGLE 2 because of flow rate reduction and increased response time.
Consult RKI Instruments, Inc. for sample hose lengths longer than 125 feet.
Internal Tubing
The flow system includes polyurethane tubing to route the sample between the various
components of the flow system. The internal sample tubing is not user serviceable.
Differential Pressure (DP) Switch
The DP switch is inside the front of the bottom case. It senses the EAGLE 2’s flowrate by
monitoring the pressure drop between points in the flow system. When the flowrate
becomes too low for safe operation of the EAGLE 2, a set of contacts inside it open and
the EAGLE 2 indicates a low flow alarm.
Sensor Chamber
A PVC block in the bottom case is configured to accept the four gas sensors. It routes the
sample to each sensor. The LEL sensor and the oxygen sensor are retained in the sensor
chamber by brackets. The CO and H
2
S sensors are each pushed past two sealing O-rings
into the chamber and are retained by the O-ring compression force.
Charcoal Filter
The charcoal filter is located in the front of the flow chamber next to the CO sensor. It
contains activated charcoal. The CO sensor will respond if exposed to H
2
S and certain
hydrocarbon gases. The charcoal filter scrubs these gases out of the sample to avoid false
CO readings. If false or elevated CO readings are noticed, especially in the presence of
H
2
S, change the charcoal filter. The charcoal inside the filter cannot be replaced; the entire
filter must be replaced.
Exhaust Fitting
The exhaust fitting is located below the inlet fitting. It routes the gas sample out of the
EAGLE 2. It includes a female 10-32 thread that can be used for the installation of a hose
barb or other type of fitting that has a male 10-32 thread so that the exhaust can be routed
to a particular location with flexible tubing if desired.
Standard Accessories
Standard accessories include the shoulder strap, the sample hose, and the hydrophobic
probe.
Shoulder Strap
A comfortable elastic shoulder strap clips to the EAGLE 2 at the front and rear of the top
case. It clips to stainless steel rings that are installed in features on the top case. It can be
removed from the EAGLE 2 by opening the clip at each end of the strap and removing it
from the strap ring at the front and rear of the top case.
Hose and Probe
A 5 foot polyurethane sample hose and a 10 inch hydrophobic probe are included as
standard. The hose has a male quick connect fitting on one end and a female quick connect
fitting on the other end. The probe has a male quick connect fitting. Normally, the male
end of sample hose is installed in the EAGLE 2 inlet fitting and the probe is installed in
the female end of the hose. However, if the sample hose is not needed for monitoring a
particular area, the probe may be installed directly to the inlet fitting. Sample hose lengths
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