What is the proper way enter calibration information into the FL900?


Dokument-ID TE8942


Veröffentlichungsdatum 08.11.2017
What is the proper way enter calibration information into the FL900?
How to properly enter the FLO-DAR calibration information into the FL900 using FSData Desktop: Basic Setup page.
  1. Note: This will not focus on aspects related to the sensor, except as they are programmed into the FL900.  For information on proper calibration of a sensor, see calibration articles for the specific sensor you are using (e.g., FLO-DAR, FLO-TOTE, etc.)
  2. Make sure the FLO-DAR is connected to the FL900.
  3. After connecting your computer to the FL900, click on the "Sensors" button at the top (between "Communications" and "Alarms").
  4. Right below the "General Settings" button at the top, it says "Sensor" and next to that is a box which should have "FLO-DAR" and what Port it is connected to:
    • For example: "Port 1 (FLO-DAR)"
    • If you do not see this, then:
      • You must go back to the "General Settings" page and select the FLO-DAR on Port 1.
      • Or, the FLO-DAR is not properly connected to the Port.
      • Or, the FL900 does not see the FLO-DAR. This could be a result of a defective logger or a defective FLO-DAR.
  5. Next click on the "Basic Setup" page.  This article will only cover the "Basic Setup" page.
  6. Below the "Basic Setup" tab, in black letters it says "FLO-DAR U-sonic Level Settings."
  7. The first item is "Transducer Type."  The FLO-DAR has two kinds of Ultra-sonic sensors, a Standard (0-60 in) and a Long Range (0-20 ft).  The default is Standard.  Select the sensor you have.
  8. Next, there is "Sensor Height".  This is the distance from the bottom of the channel to the top of the frame (next to where the Ultra-Sonic sensor is).  Or, it can be:  (Pipe ID) + (the distance from the interior crown of the pipe to the top of the frame).  See dimension "2" in the picture below.

  1. The next item is "Sediment."
    • Enter the amount of sediment/silt in the pipe.  Measure up in the pipe where the FLO-DAR radar signal is hitting.
  2. "Level Calibration."
    • "Level Calibration" is a correction factor to make the Level reading from the FLO-DAR match the Level reading taken manually.
    • For example, if the manual (actual) reading is 6" and the FLO-DAR reads 5", then the "Level Calibration" should be set to 1.00"
    • Or if the manual (actual) reading is 6" and the FLO-DAR reads 7", then the "Level Calibration" should be set to -1.00"
  3. "FLO-DAR Velocity Settings".
    1. Set this to "Direct Mean."
  4. "Site Multiplier"
    • This a calibration adjustment to make the FLO-DAR velocity match the actual velocity.  The velocity measured by the FLO-DAR is multiplied by the number in the box.
    • For example, if the FLO-DAR measures a velocity of 4.0 fps and the actual velocity of the water is 4.8 fps, then enter 1.20 into the Site Multiplier box.
    • If the "Site Multiplier" is less than 0.75 or greater than 1.25, you should investigate to determine if there is some issue with the site that is making the FLO-DAR and the manual velocity meter read different. 
  5. "SVS Port"
    • If the FLO-DAR has an SVS sensor (Surcharge Velocity Sensor), you must assign it to the Port is connected to here. 
    • If you do not assign a Port to the SVS sensor here, the SVS sensor will not work.
  6. "Reversed SVS Sensor"
    • A FLO-DAR is usually mounted so that it is measuring the velocity on the influent side, measuring up in the pipe.   Occasionally, this cannot be done for some reason, so the FLO-DAR is mounted on the effluent side pointing into the pipe.  This is called a "Reversed Sensor."
    • When a sensor is reversed, this box must be checked so that the SVS (Surcharge Velocity Sensor, which reads when the pipe is in a surcharge condition) reads the velocity in the correct direction.
    • If the box is not checked, the SVS sensor will read negative flow during surcharge.

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