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M300EU M300EU OPERATING INSTRUCTIONS
(Addendum to M300EU Manual - P/N 04145)
6.3.5. RNGE Æ MODE Æ AUTO: CONFIGURING THE M300EU ANALYZER
FOR AUTO RANGE MODE
AUTO range mode gives the analyzer to ability to output data via a LOW range (displayed on the front panel as
RANGE1) and HIGH range (displayed on the front panel as RANGE2) on a single analog output.
When the AUTO range mode is selected, the analyzer automatically switches back and forth between user-
selected LOW & HIGH ranges depending on the level of the CO concentration.
• The unit will move from LOW range to HIGH range when the CO concentration exceeds to 98% of the
LOW range span limit.
• The unit will return from HIGH range back to LOW range once the CO concentration falls below 75% of
the LOW range span limit.
To set the ranges press following keystroke sequence:
NOTE
Avoid accidentally setting the LOW range (RANGE 1) of the instrument with a higher span limit than the
HIGH range (RANGE 2). This will cause the unit to stay in the low reporting range perpetually and defeat
the function of the AUTO range mode.
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