RKI Instruments Eagle Series - Manual (Page 15)

10 • Description: Eagle and Remote Detector Diffusion Eagle Instruction Manual
Standard toxics (CO and H2S) sensors
The carbon monoxide (CO) and hydrogen sulfide (H
2
S) sensors are
physically very similar. They both have cylindrical bodies and they are
mounted with their faces behind a perforated hole pattern covered by a
hydrophobic membrane to allow the ambient air to diffuse into the sensors.
The CO sensor connector connects to the CO (CN1) socket and the H
2
S
sensor connector connects to the H
2
S (CN4) socket on the interconnect PCB.
The toxics sensors are electrochemical cells, which react to the target gas in
the atmosphere, producing a current proportional to the concentration of gas.
The current is converted by the Eagle into a reading of target gas
concentration.
Buzzer
A solid-state electronic buzzer is mounted inside the lid of the Remote
Detector’s case. The buzzer sounds for gas alarms, malfunction, low battery
voltage, and as an indicator during use of Eagle’s many display and
adjustment options.
Connector
The Remote Detector has a single, 18-pin male connector with a retaining
ring. The connector is attached to the Remote Detector’s case by three
screws. The connector allows the Remote Detector to be attached to the Eagle
in two ways, as stated above. (To attach the Remote Detector to the Eagle, see
“Starting Up the Eagle” on page 11.)