CPS Leak-Seeker LSCG Manual de inicio rápido - Página 14
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its combustion in air is its LOWER EXPLOSIVE LIMIT (or "LEL"). And,
an LEL varies from gas to gas, but most flammable gases are usually
less than 5% by volume (but nearly never greater than 20%). See the
full LSCG Owner's Manual at cpsproducts.com for more information.
2 . NON EXPLOSIVE / EXPLOSIVE RANGE DIAGRAM FOR
METHANE
NON-EXPLOSIVE RANGE
(Too Lean)
BELOW a specific LEL for a combustible gas, the mixture is too "lean"
(not enough gas is present to burn). See the above visual diagram
3. EXPLANATION & EXAMPLE OF PPM, LEL FOR
PPM (Parts Per
Million)
50,000 PPM
Methane
25,000 PPM Methane
10,000 PPM Methane
(MAX Value Possible
On LSCG)
1,000 PPM Methane
EXPLOSIVE RANGE
FOR METHANE
that applies to Methane only.
METHANE GAS
LEL % (Lower
Explosive Limit)
100% Of The LEL For
=
Methane
50% Of The LEL For
=
Methane
20% (MAX % Possible
=
On LSCG) Of the LEL
For Methane
0.1.% Of The LEL For
=
Methane
14
NON-EXPLOSIVE RANGE
(Too Rich)
Notes
At 50,000 PPM (or 5%
concentration),
Methane has reached its
minimum concentration
for combustion
At 25,000 PPM (or 2.5%
concentration), there
isn't enough Methane
for combustion
At 10,000 PPM (or 1%
concentration), there
isn't enough Methane
for combustion
At 1,000 PPM (or 1/10%
concentration), there
isn't enough Methane
for combustion