Orbisphere 3600 series - Model 32646.E Hydrogen Compensation for Oxygen Sensor

16 3600 Analyzer for O
2
Measurement—Operator’s Manual
3600O2.OM.E9903
1.3.3.5 Model 32646.E Hydrogen Compensation for Oxygen Sensor
This software option permits you to operate the O
2
sensor in samples containing
high levels of H
2
. This calibration routine requires that a source of reasonably pure
(for example, 99.8% or better) H
2
be available, along with an accurate pressure
gauge. To operate, choose “Pure Hydrogen” from the “Calibration” routine and
then press “ENTER” to bring up this screen:
H2 PRESSURE 1000
(CAL) mbar ^
Using the “ñ” or “ò” key to adjust each digit and “ENTER” to activate, enter the
absolute (gauge plus atmospheric) pressure of the H
2
sample (value must not be
zero). The first time this calibration is performed, you will see a menu as follows:
CURRENT
12.34 nA
This is the system’s way of establishing a baseline for the expected sensor current
(in nanoamperes; above is an example only) in the presence of pure H
2
.
Subsequent calibrations will yield a menu like this:
NOW 95.4% OF
LAST CALIBRATION
Note that in order to use this option, the “H
2
Compensation” routine under
“Modify Options” must be enabled. See section 1.4.7.