User Manual

4 Eclipse Detector Head Operator’s Manual
Description
Figure 1: Eclipse Component Location
The Eclipse consists of the gas detector, amplifier set, and junction box.
Gas Detector
The gas detector senses the target gas and is mounted in a 3/4” conduit hub on the left
bottom side of the Eclipse. The detector type will depend on the target gas and may be one
of the following: combustible gas, oxygen, carbon monoxide (CO), or hydrogen sulfide
(H2S).
The CO and H2S detectors have replaceable sensors. The CO detector includes a charcoal
filter disk which is held onto the sensor with a rubber retaining boot. The charcoal filter
disk scrubs out interfering gases to which the CO sensor responds such as H2S and certain
hydrocarbons.
NOTE: The combustible gas detector has a 1/2” NPT thread and requires a 3/4” x 1/2”
conduit reducer to mount in the detector hub.
Amplifier Set
The amplifier set converts the electrical output from the detector to a signal which can be
displayed by the LCD display and also to a 4 - 20 mA signal (that is proportional to the
detection range). The 4 - 20 mA signal may be used by a recording device, gas monitor
controller, or programmable controller. The amplifier set consists of two potted printed
circuit board (PCB) assemblies: the interconnect and control PCB’s. The control PCB
includes the LCD display and optical control switch. The interconnect PCB includes the
ECLIPSE
GRN
BLKBLK
WHT
RED XXX
GRN
WHT
XXX
Cl2: Yellow
S O 2 : O r an ge
CO: Red
H2 S : Red
-+
2 4 VDC
IN
FB
Interconnect PCB
View With Cover and
Control PCB Removed
PATENT
PENDING
ECLIPSE™ GAS MONITOR
™
3/4" Conduit Hub
View With Cover Removed
Detector (Combustible shown for ref))
Ribbon Cable Connector (behind nameplate, cable not shown)
Nameplate
Junction Box
LCD Display
Control PCB
Optical Switch
Ribbon Cable Connector
Power/Signal Terminal Strip
Sensor Terminal Strip