Calibration Gas - Emerson Rosemount 5081FG Reference Manual

Reference Manual
00809-0100-4882, Rev AB
May 2019

Calibration Gas

Figure 2-13. Gas Connections at
Oxygen Probe
Two calibration check gas concentrations are used with the Two-Wire In-Situ
Oxygen Analyzer: Low Gas - 0.4% O
balance in nitrogen.
Do not use 100% nitrogen as a low gas (zero gas). It is suggested that gas for the low (zero)
be between 0.4% and 2.0% O
than 40 parts per million. Failure to use proper gases will result in erroneous readings.
Do not use 100% nitrogen for the low (0%) check gas. See Figure 2-13 for the
probe connections. Set both calibration check gases at the same flow rate: 5
scfh (2,5 /min).
Rosemount 5081FG
and High Gas - 8% O
2
. Do not use gases with hydrocarbon concentrations of more
2
, each with the
2
2-15