OUTPUT: The output signal of the Soil Sensor (-S) unit is
approximately 50 mV in ambient air, or 2.4 mV per 1 % O2
and the output signal of the Fast-Response (-FR) unit is
approximately 11 mV in ambient air, or 0.5 mV per 1% O2.
The user must calibrate
their sensor at their location, at their pressure, to
establish the exact multiplier to convert the mV reading to
% O2. For example, if the output was exactly 11.0 mV the
multiplier would be 1.905 (20.95 / 11.0).
Absolute accuracy of the
sensor depends on how often it is calibrated. To achieve the
best accuracy, automated calibration with ambient air at
least once each day is recommended. Typical drift rates are
less than 0.05% in 24 hours.
ACCURACY: Absolute
accuracy of the sensor depends on how often it is
calibrated. To achieve the best accuracy, automated
calibration with ambient air at least once each day is
recommended. Typical drift rates are less than 0.05% in 24
hours.
ZERO OFFSET: The mV
output in ultra-pure nitrogen gas (0.000 % oxygen) is
typically ± 0.05%. Precise measurements of hypoxic and
anaerobic conditions can be made by making a periodic
zero calibration of the sensor with ultra-pure nitrogen
gas. The zero offset for each sensor is highly
reproducible and should be entered into the software
after a zero-test.
INFLUENCE FROM OTHER GASES: The sensor is
unaffected by CO, H2, and various acidic
gases such as CO2, H2S, NOx, SOx.
However, the Teflon membrane used in the sensor may be
damaged by ozone.
OUTPUT, ACCURACY,
ZERO OFFSET,
