Hummingbird Communications Paracube Micro, Инструкция по эксплуатации

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16 of 35 01115009A _9
Paracube
®
Micro – Instruction Manual
4.7 Orientation of Sensor
To achieve optimum performance, the sensor should be operated in the orientation of
calibration. Any small offsets resulting from a change in orientation may be removed by
performing a single point offset correction.
4.8 Conditioning of the Sample
Due to the inherent protection offered by the filter at the gas exchange interface,
sample conditioning can be kept to a minimum. The sensor’s hydrophobic filter will
prevent particulates larger than 1 micron and water from entering the measurement
cavity.
It is however good practice to reduce particulate contamination of the sample gas to
less than 3 microns to prevent blockage.
Sample Temperature
Condensation within the sensor may be avoided by ensuring that the sensor
temperature is at least 10°C above the sample gas dew point.
4.9 Pressure Effects
The sensor is a partial pressure device and variations in sample gas pressure will
cause fluctuations in the observed oxygen output, proportional to the pressure change.
Under these circumstances the following methods may be employed to mitigate this
effect.
Method 1 – with Sensor’s On-board Pressure Compensation Disabled
Precise control of the sample stream pressure can be adopted by the end user. This
applies particularly to pneumatic systems where the sensor is not vented directly to
atmosphere, and where restrictions in the sample exhaust will cause the sample back
pressure to vary with sample flow, resulting in oxygen reading errors.
This method is only applicable if the sensor forms part of the sealed sample stream,
which is independent of ambient pressure swings.
Method 2 - with Sensor’s On-board Pressure Compensation Enabled
By employing the sensor’s on-board pressure compensation and by selecting the
correct variant for the application the oxygen reading is automatically corrected
internally with no further action required by the end user. For barometric pressure
compensation, select variant 01115704, 01115705, 01115706 or 01115707. For
sample pressure compensation select variant 01115710, 01115711, 0111512 or
01115713.
CAUTION – No. 5
The sensor has exposed electronics which are at risk from
Electro-Static Discharge (ESD). Only handle the sensor in a
static safe environment.