Geotech GEM5000 - Page 125

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Page 125 of 127
Operating Manual
OMGEM5KN – Iss. 5.1
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Copyright – Geotechnical Instruments (UK) Ltd
GEM5000
H
2
S filter
Filter required for removal of H
2
S.
When the filter material changes colour to a light grey
colour or if H
2
S values are displayed, then the filter
should be replaced.
Hydro-carbons
Organic compound consisting of only hydrogen and
carbon.
In-line water filter
The component used to help protect the instrument
from water ingress.
LCD display
Liquid Crystal Display
LEL
Lower Explosive Limit.
Lower explosive limit of methane in air. 5% methane in
air is the point at which it becomes explosive. 100%
LEL equates to 5% methane.
m/s
Meters per second – measurement of gas velocity.
m
3
/hr
Meters cubed per hour – volumetric flow rate
measurement.
Main gas read screen
The main analyser screen for normal operations and all
operations are carried out from this screen.
Material data sheet
Document from which information about a certain
substance can be obtained.
MCERTS certification
MCERTS is the UK Environment Agency's Monitoring
Certification Scheme. The scheme provides a
framework within which environmental measurements
can be made in accordance with the Agency's quality
requirements. The scheme covers a range of
monitoring, sampling and inspection activities.
Memory
Location where data and ID information is stored. The
analyser memory should not be used as a permanent
storage medium. Stored data should be regularly