Eagle Home Products Eagle Series User Manual download pdf (Page 58)

52 • Appendix B: Methane Elimination Eagle Instruction Manual

Appendix B: Methane Elimination

For applications where methane is an interfering gas, you can set the

Eagle to eliminate most response to methane. The methane

elimination switch is a standard feature on the circuit board inside the

top of the Eagle’s case. An external switch is available as an option. For

this type of detection, the combustible gas channel must be

programmed to display HEX or *** (see “Updating Channel Settings”

on page 25.) Eagles with the external methane elimination switch are

factory-set with the correct display.

Setting up for methane elimination mode

1. Take the Eagle to a fresh-air environment. Set the internal methane

elimination switch to the HEX ON position or the external switch

to Methane Response Off.

CAUTION:If the Eagle is equipped with an external methane elimination

switch, do not adjust the internal switch. The internal switch

should always be in the CH4 position.

2. Allow 2 minutes for the combustibles sensor to stabilize.

3. Perform the demand zero procedure as described in “Preparing

for Calibration” on page 41.

WARNING: DO NOT adjust the switch after re-zeroing the Eagle.

Response to CH

is greatly reduced when the internal

switch is set to “HEX ON” or the external switch is set

to “Methane Response Off”. If used for methane

detection, the internal switch must be set to “CH4” or

the external switch set to “Methane Response On”.

Operating with methane response off

Monitor for combustible gas as you normally would. When the Eagle

is operating in Methane Elimination mode, response to methane is

reduced by 90% or more. Response to hexane is reduced slightly

(approximately 15%). To convert readings for most common

combustible gases, see Table 7 on page 53.

Returning to methane response mode

1. Take the Eagle to a fresh-air environment. Set the internal methane

elimination switch to the CH4 position or the external switch to

Methane Response On.

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Eagle Home Products Eagle Series User Manual Page 58