Hach AV9000, User Manual

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Figure 5 Attach the desiccant hub—AS950 portable sampler
1 End cap
Zero level calibration
If one or more of the statements that follow are correct, do a zero level calibration before the sensor
is installed.
• The installation location is a dry channel.
• It is not possible to get an accurate level in the flow because the level changes too rapidly.
• It is not possible to get an accurate level in the flow because of physical hazards.
Note: The sensor is factory-calibrated for the specified range and temperature.
Zero level calibration (FL series flow logger or sampler)
To do a zero level calibration with an FL900 flow logger, do a zero level calibration (zero calibration
in air) with the
FS
DATA Desktop Setup Wizard. Refer to the
FS
DATA Desktop documentation for
instructions. As an alternative, do a manual zero level calibration (zero calibration in air) with
FS
DATA Desktop.
To do a zero level calibration with the FL1500 flow logger or sampler, refer to the FL1500 flow logger
or sampler documentation for instructions. As an alternative, do a zero level calibration with the
FS
DATA Desktop Setup Wizard when the sensor is connected to an FL1500 flow logger.
Make sure that the sensor is out of the water and on a flat, level, horizontal surface.
Note: If the sensor is replaced, removed for maintenance or moved to another instrument, do a zero level
calibration.
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