TABLE OF CONTENTS



Estimated reading time: 3 minutes, 29 seconds.


Introduction


Normally without any calibration the bluebot will record high density water data with great precision. In certain enviroments or use cases you may need to use one of our calibration tool's. In rare cases if needed, re-setting the zero point for the meter for removing false flow or 'noisy" behavior and/or implementing a K-Factor to adjust flow readings will calibrate your bluebot.


Click Here learn more about the bluebot LED indicator colors and behavior patterns.


Calibration Tools


Set Zero Point (Re-zeroing)


Performing a zero point calibration can be useful if your bluebot is experiencing irregular flow patterns directly after initial installation or if you move your device to a new water system and experience what we describe as false flow or "noisy" behavior.  Signal noise is usually witnessed as a false flow rate between 0.1 to 0.4 gpm, but sometimes can spike higher as shown in the graph below.  Re-zeroing does not mean the bluebot is malfunctioning, rather it is a rare characteristic of transit-time ultrasonic technology that occurs for various reasons and can be quickly solved.


The screenshot below is an example of a bluebot exhibiting false flow or "noisy" behavior typically caused by ultrasonic sensor noise.  The flow rate of 0.4 gal is in fact noise because here we know the water was shut off at the main.  At 2:55 the noise was removed by setting the zero point by following the procedure below.


 



Set The Zero Point


To calibrate, you want to confirm that no flow is running. You can turn your water line off if you desire, but it is not required. From within the app, navigate to “re-zero”. This will calculate and calibrate your zero point and all future readings will adjust based on this change. You can re-zero at any time.

  1. Open the "bluebot water" application
  2. Begin at the dashboard
  3. Tap to enter the device showing false flow
  4. Scroll down to "Hardware" and select "Device Profile"
  5. Scroll to the bottom of the Device Profile section and select "Sensor Details"
  6. Ensure no water is flowing (to guarantee no-flow, you may want to shut off the water temporarily)
  7. Tap "Set Zero Point" 
  8. Tap "Yes" after reading the prompt
  9. Wait a few seconds and the calculated zero point will show as a positive or negative number.
  10. If results are undesired due to flow running during zero point calibration, wait for no flow and start again.


Warning: If flow occurs during zero point calibration your meter will become temporarily inaccurate. Furthermore, ensure you are in fact experiencing false flow before you set the zero point. False flow is usually extremely low flow from 0.1 to 0.4 gpm. Failure to follow these instructions may result in you "hiding" a real leak.


 

K-Factor


This calculation is used if you are comparing two meters in the same line and due to application differences they read differently. For example, the gallon usage shown on your water bill may slightly differ from bluebot recorded data over the same period. If you want the meters to align, calculate and apply a K-Factor.  K-Factors are regularly used in the flow measurement industry and are a useful tool when needed.

Example: You run a small farm and have a master meter for a wellhead and your mechanical master meter recorded you used 9400 gallons in one week period. You check your application and bluebot records 9300 gallons for the same period. Use the K-Factor so the data shown in the bluebot app always aligns perfectly with the master meter. 


The K-Factor calculation is very simple and the app does it automatically via the K-Factor tool.  


The K-Factor formula is:  Master Meter Gallons / Secondary Meter Gallons = K-Factor ; So, K=Factor 9400/9300 = 1.01075268


Setting the K-Factor:


  1. Write down your total water usage in gallons and the period start and end date
  2. Open the 'bluebot water" application
  3. Begin at the dashboard
  4. Tap to enter the device you wish to add the K-Factor
  5. Scroll down to "Hardware" and tap "Device Profile" to enter
  6. Locate the K-Factor tool under the General section
  7. Tap "Update" K-Factor and input the bluebot gallons and your base meter gallons (from your water bill)
  8. Input the Period Start and Period End (dates)
  9. Save and you will see your K-Factor adjust from 0.00 to a new K-Factor
  10. You may change your K-Factor at any time
  11. Wait until blue finishes his animation and you should see a number for the new zero point, positive or negative.
  12. If results are undesired due to flow running during zero point calibration wait for no flow and start again.


Warning: Do not update your K-Factor unless you have definitive data from your water utility or another base meter to measure against. Failure to use verified data will lead to inaccurate data in the app. 
If you have any questions or would like to speak to a member of the bluebot team, contact us directly at hello@bluebot.com or call/text (831) 275-2715 M-F 10 AM - 6 PM PST.