2D Measurement Method - Hach FH950 User Manual

The handheld unit gets information from the sensor and shows the average velocity value in
numeric and graphical form.
5. If necessary, select Setup to change the Y-axis range in FPA filtering mode, the X and Y-axis
range when in RC filtering mode or the data filter parameters.
6. Push OK to confirm the information.
7. Select Next. The next measurement screen in the series appears.
8. Do steps 2–7 for the other measurement depths.
9. Select one of the options at the bottom of the screen.
Option Description
Save Calculates the current flow value and saves this information to a data file.
Units Changes the unit type (English or Metric).

2D measurement method

Velocity is measured while the sensor is moved through the flow as shown in
Select Cancel at any time to cancel the measurement and return to the Select Method menu.
Note: The RC filter mode with a value of 2 to 4 seconds is recommended for this method.
1. In the Select method menu, select 2D.
The sensor depth information is shown.
2. If necessary, adjust the sensor depth.
3. Select Capture. While the sensor collects data, move the sensor through the entire cross-section
in the pattern shown in
4. If necessary, select Setup to change the Y-axis range in FPA filtering mode, the X and Y-axis
range when in RC filtering mode or the data filter parameters.
5. Push OK.
6. Select one of the options shown at the bottom of the screen.
Option Description
Save Calculates the current flow value and saves this information to a data file.
Units Changes the unit type (English or Metric).
Figure 14 Path of the sensor in the flow
1 Start
26 English
Figure 14.
2 Finish
Figure 14.