Geotech GEM5000 - Page 72

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Page 72 of 127
Operating Manual
OMGEM5KN – Iss. 5.1
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Copyright – Geotechnical Instruments (UK) Ltd
GEM5000
measure, i.e. if you are trying to measure gas migration on a closed landfill, we’d recommend calibrating
with CH4 5%/CO2 5%.
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In regards to frequency, we would recommend that you perform a fresh air calibration before each
monitoring session, and a span calibration typical every 4 – 6 weeks.