FTS DTS-12, Руководство пользователя

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700-DTS-12 Rev. 28 - 16 Apr 2020 Page 2/28
1.2 Unpacking
You should have received the following materials with each DTS-12 sensor:
1.
DTS-12 Turbidity Sensor complete with 25’ (or user specification) of polyurethane cable.
2.
Spare wiper blade.
3.
DTS-12 SDI Turbidity Sensor Operating Manual
1.3 Site Selection
The sensor should be located in an area that is representative of the water to be measured,
preferably in a shaded area.
1.3.1 Avoiding Sun Spikes
It is possible for direct or reflected sunlight to affect the DTS-12 measurements. Selecting a shaded
site will eliminate the possibility of sunlight affecting the DTS-12 turbidity readings; however, if a
shaded site is not available, if possible, mount a shade to eliminate sunlight effects on the DTS-12.
The installation directions (Section 1.4) contain further details on how to optimally deploy the DTS-12
to avoid interference from sunlight.
A typical data set from the DTS-12 from a sunlight affected deployment is shown below. Note the
daily pattern of zeroes in the turbidity measurement.
In older DTS-12 units, sunlight affected
readings will be large positive spikes. The difference in how the older and newer units respond to
sunlight is due to how the
DTS-12
firmware handles the erroneous readings.
Figure 1-2: DTS-12 data showing 0 NTU