How do you calibrate the Level on a Flo-Dar using a FL900?

Document ID

Document ID TE8242

Version

Version 2.0

Status

Status Published

Published Date

Published Date 03/12/2018
Question
How do you calibrate the Level on a Flo-Dar using a FL900?
Summary
Flo-Dar ultrasonic level calibration with FL900 using FSData Desktop
Answer
  1. Follow the procedures for communicating with the FL900 using a Laptop found here.
  2. Confirm the pipe diameter with a tape measure or carpenter’s rule, and/or inside pipe calipers. Both a vertical and horizontal measurement must be taken.
  3. Using a rigid, slim, ruler – place the ruler vertically into the flowing liquid to the point where the ruler bottoms out in the flow channel. Make sure that the ruler is short enough to be placed inside the pipe so that the depth measurement can be taken in the pipe 
  4. IMPORTANT – WHILE PERFORMING THE MANUAL DEPTH MEASUREMENTS, BE SURE NOT TO BE STANDING IN THE FLOWING WATER, AS THIS WILL AFFECT THE WATER DEPTH IN THE PIPE AND/OR CHANNEL.
  5. Click the “Sensors” tab, then “Calculate” next to the “Level Calibration” Field and input the depth measured in the previous step into the “Actual Level” field.
  6. Click “Take Measurement” and allow the instrument to perform a real-time measurement and compare the real-time measurements on the laptop screen to the manual measurements taken in the manhole. While the instrument is performing real-time measurements, it is crucial that the person in the manhole stands clear of the flowing liquid and sensor. 
  7. If the level readings from the instrument are within acceptable tolerances, click “Cancel”. If the instrument is not reading the proper level, click “Ok” to automatically adjust the Ultrasonic Level Calibration in the instrument software setup screen to dial in the depth measurement. Be sure to click “Write to Logger…” and repeat steps 1.3 through 1.4 above (as required) to confirm that the Flo-Dar instrument is, in fact, dialed in properly.

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