2-1
GENERAL INFORMATION
GENERAL INFORMATION
Ranges of Operation
LEL, 0 to 100%
The LEL range indicates the explosibility of the flammable
gas in the sample. This is displayed as a percentage of
the lower explosive limit (LEL) of the gas.
The instrument range is displayed in the top right corner
of the display as % LEL. From 0 to 10% LEL the digital
display resolves to 0.1% LEL. From 10 to 100% LEL the
digital display resolves to 1% LEL. The analogue bar graph
follows in 4% steps. An example of the LEL display is
shown in Figure 2-1. Autoranging will automatically switch
the range to Volume Gas when 100% LEL is reached.
The detection principle for this range is a catalytic
reaction.
Figure 2-1 LEL Range
2
Summary of Contents for Gasurveyor 500 Series
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