Setting Up the GALAXY GX2
GALAXY GX2
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The GALAXY GX2 processes gas cylinder information and instrument readings in ppm,
%(volume) or %LEL. If using certified gas cylinders with the content specified in ppm, the most
accurate gas readings from the instrument will be obtained with the instrument set to ppm.
Conversions between ppm and mg/m3 are completed at standard pressure and temperature val-
ues. If the gas detector is set to display the readings in mg/m3, note that differences in the follow-
ing environmental conditions will cause the readings to be affected:
- Standard temperature: 20 ºC (68 ºF)
- Standard pressure: 101 kPa (760 torr)
An instrument can be set up with Comb EX as its combustible gas. Comb EX is combustible gas
that is not in the GALAXY GX2 database and must be manually entered. Hexane is an example
of a Comb EX gas that can be used for calibration, but is not listed in the database. Not all com-
bustible gases can be used to calibrate the ALTAIR family of gas detectors. If the Comb EX se-
lection is used, contact MSA to confirm your selected combustible calibration gas is compatible
with the instrument and GALAXY GX2.
To access all functionality of the GALAXY GX2 cylinder configuration capabilities,
an electronic Cylinder Holder must be connected to the GALAXY GX2.
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