Calibration Procedure for the PTLevel Cistern Level Monitor

Calibration Procedure and Sensor Accuracy for Wired WiFi

After you’ve installed your new device and setup the depth of your tank, you must calibrate the device in order to achieve a proper reading. This process is simple and is explained below.

Jump to the end of the article for sensor accuracy and resolution data

Note: The Old model of the Wired WiFi does not have a button (prior to about November 2023). 

Calibration Procedure - For Wired WiFi PTLevel with a button (after October 2023)

New Wired WiFi PTLevel - November 2023

You can not calibrate at 0% or really low levels, and you must not calibrate when your device is not fully functional yet.
First press the “Connect” button on the transmitter and refresh your browser. This obtains the latest level reading online before calibrating.

Measure the amount of liquid in the tank. Then divide that measurement by the full empty depth of the tank.

Example: 72″ of water / 144″ tank height = 0.5

Multiply the above result with 100 to get the current percentage.

Example: 0.5 * 100 = 50%

Enter the result into the calibration input online once. Then hit the green save icon beside the form. You can find this form under your device “Features” button on the dashboard.


Wired WiFi Dashboard


Finally, press the “Connect” button on the transmitter one more time for it to calibrate to the most recent reading.

If you have to calibrate often, you may have a different issue. Please see the other articles available to you for further troubleshooting. It is also acceptable for the reading to be off a few percent over the full range. This is due to environmental changes and the tolerances of the sensor. 

Calibration Procedure - For Wired WiFi PTLevel without a button (Before Nov 2023)

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You can not calibrate at 0% or really low levels, and you must not calibrate when your device is not fully functional yet.
Since your Wired WiFi PTLevel does not have a button, you'll want to make sure your device has the most up to date reading before calibrating. The device updates about every 2 minutes, so if you've just lowered your pressure chamber into the tank or just had the tank filled, please wait about 2 minutes and check online to make sure your device has been updated. See the image below:


Measure the amount of liquid in the tank. Then divide that measurement by the full empty depth of the tank.
Example: 72″ of water / 144″ tank height = 0.5
Multiply the above result with 100 to get the current percentage.
Example: 0.5 * 100 = 50%
Enter the result into the calibration input online once. Then hit the green save icon beside the form. You can find this form under your device “Features” button on the dashboard.

Wired WiFi Dashboard

Accuracy

It is acceptable for the reading to be off a few percent over the full range. This is due to environmental changes and the tolerances of the sensor. 
The typical accuracy is ±3%

Resolution of Sensor

Pressure Range: 0 to 100kpa : Just to get an idea, 1 meter of water column is around 9.81 kpa but the tubing length and other environmental factors (such as altitude and temperature) changes that a bit.
Pressure Resolution: 0.096kpa per bit. This works to about 9.78mm of approximate resolution.

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