Appendix | Model 9700 |
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To determine the concentration of a compound present at the sensor from a meter reading, when calibrated with methane, divide the reading (in percent methane) by the factor. For example, if ethylene is flowing by the sensor, and a meter reading of 2.0% is obtained, the concentration of ethylene would be:
For hydrogen:
For carbon monoxide:
For a mixture of 70% hydrogen and 30% carbon monoxide:
CAUTION: In most cases, the concentration of any particular compound that the sensor is exposed to should not exceed the LEL of that compound, or sensor damage could occur.
The concentration of combustibles should never exceed that which will react completely with the available oxygen present in the sample (stoichiometric burning), otherwise, "coking" (the deposition of carbon from incomplete combustion) will occur at the sensor, and drift and a loss of sensitivity will result.
TELEDYNE BROWN ENGINEERING |
Analytical Instruments
