ENMET OMNI-4000 - Manual (Page 54)

ENMET Corporation OMNI-4000 S/N 6705 and above
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Returning to Operator Mode
• Remove the calibration cover
• Remove the programming plug
• The OMNI-4000 is now ready for use
3.6 Replacing the Explosive Gas Sensor
This sub-menu is used to configure the OMNI-4000 following the installation of a new explosive gas sensor. It also
allows the zero point and the sensitivity of the explosive gas sensor to be set by means of a calibration mixture
(methane).
C AUTION : Never start this procedure unless the corresponding cylinder of gas is available.
Equipment Required
‰ A small phillips head screwdriver
‰ A new explosive gas sensor
‰ The calibration cover
‰ A vinyl hose, approximately 1 m.
‰ A cylinder of calibration gas of known contents (for instance, or 20% LEL methane)
‰ A precision screwdriver
Preparing the OMNI-4000
• Use the screwdriver to remove both covers of the enclosure
Replacing the Explosive Gas Sensor
• Remove the old explosive gas sensor. See Figure 3-9
• Install the new explosive gas sensor. There is a groove to ensure correct positioning.
• Put the cover which protects the sensors back into place and secure it.
Figure 3-9: Location of the Explosive Gas Sensor
Explosive Gas
Sensor