GMI Shipsurveyor - Operating Ranges Details; LEL Range (0-100%)

2-2
USER HANDBOOK
2.2 Details of Operating Ranges
The basic instrument can measure 0-100% LEL and
0-100% VOL GAS.
Other models can measure the following gas types:
• Oxygen (O
2
)
• Hydrogen Sulphide (H
2
S)
• Carbon Dioxide (CO
2
)
• Carbon Monoxide (CO)
2.2.1 LEL, 0 - 100 %
The LEL range indicates the explosivity of the ammable
gas in the sample. This is displayed as a percentage of the
lower explosive limit (LEL) of the gas.
% LEL is displayed clearly in the LCD. From 0 - 100% LEL,
the digital display resolves to 1% LEL.
A congurable option allows the displayed LEL value to
have a resolution of 0.1% LEL from 0 - 9.9%, and 1% LEL
from 10 - 100%.
When the reading reaches 100% LEL, EEE (over-range) is
displayed. The user can, by using the top button, change
range to % Volume Gas in CGI mode only.
An example of a 10% LEL gas detection reading is illustrated
in Fig. 2-2 (example from Shipsurveyor 1 model).
Fig. 2-2 LEL Example (CGI mode)