216 • Start Up and Normal Operation
EAGLE 2 Operator’s Manual
Infrared Sub PCB
The infrared sub PCB is a circuit board that is installed on the main PCB in one of the 3
sub PCB positions when an infrared methane sensor is used with the EAGLE 2. The
infrared methane sensor connects to the sub PCB with a 12-position connector. The sub
PCB plugs into the main PCB and is held in place with a screw/flat washer/lock washer.
There are no user serviceable parts on the infrared sub PCB.
Start Up and Normal Operation
For instructions to startup and use an EAGLE 2 that includes an infrared methane sensor,
reference “Start Up” on page 27, “Measuring Mode, Normal Operation” on page 33, and
“Measuring Mode, Alarms” on page 38.
Detection Ranges
The infrared methane sensor can be factory set to detect gas in a 0-100 %LEL
configuration, an autoranging configuration, or a 0 - 100.0 %volume configuration. The
autoranging configuration detects gas on a 0-100 %LEL and a 5.0-100.0 %vol scale. The
gas reading will be displayed in %LEL until the gas level reaches 100 %LEL, or 5.0 %vol
for methane. Once the gas reading is above 100 %LEL, it is displayed in %vol. Alarm
points exist for the %LEL range but do not exist for the %vol range.
Catalytic (LEL) Sensor Screen
When either a TC sensor or an infrared combustible sensor is installed in an EAGLE 2
along with a catalytic combustible LEL sensor, the user has the option of turning off the
catalytic combustible LEL sensor in Display Mode. If the unit is going to be used for
sampling known high-levels of combustible gas or in areas with known catalytic sensor
poisons such as silicone vapors, the catalytic combustible sensor should be turned off.
Even though this sensor has its own protective shut off, exposure to high levels of
combustible gas can still stress the catalytic LEL sensor. The catalytic LEL sensor can be
enabled or disabled in the Catalytic (LEL) Sensor screen in Display Mode. The default
setting is enabled. To change the setting, do the following:
NOTE:
The Catalytic (LEL) Sensor setting is reset when the EAGLE 2 is turned off.
When the EAGLE 2 is turned on, this setting is always ENABLED.
1. Use the DISPLAY ADJUST NO button to enter Display Mode and scroll to the
Catalytic (LEL) Sensor screen. The current setting will be flashing.
2. Use the AIR
▲
YES or RANGE
▼
SHIFT button to toggle to the desired setting.
If set to DISABLED, the gas readings for the catalytic LEL channel will be replaced
by dashes (---).
CAT (LEL) SENSOR
ENABLED
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