Fir 1, 2, 3 & 5000
Ion Science Lt d
Ion Science L td
Page 23 of 53
Instrument Menu
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LEL Gas Selection
Fir's catalytic (Pellistor) sensor is a non-specific explosive gas detector.
Although a number of explosive gases are detectable, the Fir cannot
differentiate between the gases. When you select the explosive gas you wish to
measure from the Fir internal gas list, the instrument will calculate the
equivalent level for that selected gas against a Methane calibration. Please note,
there may be other detectable gases present that may effect the measurement.
WARNING: Ion Science makes every effort to ensure the gas tables held within the Fir memory and
supplied on CD are accurate at the time of manufacture. In critical applications alarm levels must be checked,
compared and adjusted to local legislation before use.
CUSTOM offers a quick route to the last 10 selected gases. When selected, use the
UP and DOWN keys to change the gas then press ENTER to select.
LIST allows selection of any gas from within the gas table held in the Fir
memory.
After selecting the LIST symbol, select the first letter of the gas you wish to select and
press ENTER. The Fir will then list all gases starting with that letter. WMD
gases are prefixed with the letters WMD.
Alarm levels that are set in the gas table will be automatically selected. Should a gas be
selected that is not compatible with the selected lamp, the following symbol will
appear to highlight the incompatibility
.
Custom List
