LANDTEC GEM5000 Operating Manual page 121

Gas velocity
General warnings
H
2
H S
2
H S filter
2
HDOP
Horizontal Error
(HError)
Hydro-carbons
ID or Device ID
In-line water filter
LANDTEC System
Gas Analyzer
Manager
Latitude or LAT
LCD display
LEL
LANDTEC
5K-MNL-GEM5000
Longitude or LONG
The positional rate of change of the gas. Measured
using the optional anemometer.
Displayed throughout the documentation with a
warning symbol. Warning information may affect
the safety of operators.
Hydrogen
Hydrogen sulfide
Filter required for removal of H
When the filter material changes color to a light grey
color or if H S values are displayed, then the filter
2
should be replaced.
Horizontal Dilution of Precision—a measure of the
position indicated by the GPS.
The estimated horizontal error for the position
indicated by the GPS at a given moment in time.
Organic compound consisting of only hydrogen and
carbon.
The user definable identification tag "Device ID"
allocated to a sample point (well, probe or sample
port).
The component used to help protect the instrument
from liquid ingress.
Also referred to as LSGAM. PC based software
which enables the operator to upload and download
information to/from the analyzer.
LANDTEC System Gas Analyzer Manager enables
operators to maximize the operation of their gas
analyzer. It features a simple upload and
download facility and is fully compatible with the
latest MicrosoftTM operating systems.
Latitude displays as degrees, minutes, seconds and
decimal seconds. The equator is zero.
Liquid Crystal Display
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.
E (East) or W (West) displays the longitude as
S.
2
GEM5000 Gas Analyzer
Page 121