Hach AV9000 Manual Del Usuario página 9

measurements is uncommon in typical sites. The AV9000 is most sensitive to noise falling within its Doppler
analysis span of 1 MHz ±13.3 kHz. Noise at other frequencies is typically benign. Some laptop computers have
caused interference problems when operated from external AC power adapters. If such a device is affecting
your measurements, try running it from batteries, or disconnect the cable between it and the FL90x logger.
Attach the sensor to the mounting band
Mounting bands have pre-drilled holes for direct mounting of the sensor to the band. Refer to the
steps and the figures to mount the sensor on the mounting band.
Note: If the sensor is the oil-filled type, make sure the sensor is filled with oil before mounting the sensor to the
mounting band. Refer to the Fill sensor oil section of this manual.
1. Attach the sensor to the spring ring
extends past the edge of the ring.
2. Route the cable along the edge of the band
3. Use nylon-wire ties to fasten the cable to the mounting band.
The cable should exit the tied area at or near the top of the pipe.
Note: If a large amount of silt exists in the bottom of the pipe, rotate the band until the sensor is out of the silt
(Figure 6 on page 11). Make sure the sensor remains below the minimum expected water level at all times.
Silt must be measured frequently but not disturbed.
Figure 4 Attach the sensor to the mounting band
1 Sensor
2 Spring ring
Place the sensor and mounting band in the pipe
1. Position the sensor in the flow.
downstream configuration and a downstream sensor-reversed configuration.
(Figure 4). Mount the sensor so that the pressure transducer
(Figure 4).
3 Sensor cable
4 Screws (2)
Figure 5 shows a standard upstream configuration, a standard
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