Teledyne GASURVEYOR 7B-500R, User Handbook Manual

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2-2
GASURVEYOR 7B-500R - USER HANDBOOK
Methane, 0 - 1000 ppm
(CGI Mode)
This range displays the Methane gas reading in parts per
million (ppm), up to 999 ppm. When selected, PPM is
displayed in the top right corner of the LCD.
The display resolves to 5 ppm. The analogue bar graph
follows in 40 ppm steps. Fig. 2-2 illustrates the ppm display.
Fig. 2-2 ppm Range
LEL, 0 - 100%
(CGI and CSM Modes)
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.
When selected, LEL is displayed in the top right corner of the
LCD. 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. Fig. 2-3
illustrates the LEL display.
Fig. 2-3 LEL Range