Operating manual GPD 3000
Measurement range
The GPD 3000 offers the possibility to adjust the indication for different
types of gases.
However, the GPD 3000 can’t be used as an analytical instrument,
since it detects almost all combustible gases in the same manner
.
Gas type
Measurement range
Comment
Methane
0 ppm up to 2,5 Vol%
2,2Vol% correspond to
50% LEL
Propane
0 ppm up to 1,0 Vol%
50% LEL
Hydrogen
0 ppm up to 2,0 Vol%
50% LEL
This option allows adjusting your indication for different kinds of gases.
If you are working on natural gas installations, it is recommended to
measure using the methane measurement range. To work on an
installation fed with propane or hydrogen, you can select the
corresponding measurement range.
As the concentration increases, the frequency of the acoustic signal will
also increase, until reaching a constant sound with the maximum range.
When measuring, please take into account that methane and oxygen
are lighter than air and will rise. For these gases, measure above of the
pipe or the supposed leak.
Important notice for propane!
Since propane is heavier than air, when searching for leaks also begin
measuring the concentration on the ground, and then continue the
search underneath the pipe.
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