How to setup ultrasonic water sensors

How to setup ultrasonic water sensors

Installation & Wiring
Sensors must be fitted to the top of the tank, as near the centre as possible, to avoid reflections from the tank wall and to minimise reading variations when the vehicle is parked on a slope.
A side mounted overflow should be fitted, to reduce the chance of a sensor sitting underwater after filling, which may effect readings.
The sensor is not suitable for tanks with sloped or irregular shaped base, as this will cause incorrect readings.

Configuring the sensors
Before the display can communicate with the Sargent Ultrasonic Water Sensors they must first be enabled from the ADVANCED SETUP menu 



In order for the water level to be displayed, the relevant tanks must also be enabled.
If Ultrasonic Sensors have not been configured for a particular tank, then the system assumes a traditional rod or stud type sensor is fitted.



Automatic Calibration
When 12 volt power is applied to the sensor for the first time, it will automatically start the calibration procedure, to measure the tank depth.
After calibration the sensor will start to send out regular readings of remaining water in the tank
For fresh sensors this is around every 5 seconds
For waste sensors this is around every 10 seconds
When powering a sensor for the first time, make sure the tank is empty to ensure correct calibration
If a sensor needs to be re-calibrated, this can be done from the Advanced Setup menu of the control panel
After calibration the 100% full level will be set at 30mm below the calibrated tank depth, as the sensor cannot measure fluid levels closer than 30mm to the sensor face.


Manual Calibration
If a sensor needs to be re-calibrated for any reason, this can be done manually from the ADVANCED SETUP menu

Before starting, make sure the tank is empty to ensure correct calibration

Information Displays
Once the water sensors have been configured, data from each enabled sensor will be available from the WATER menu.
Levels from ultrasonic sensors can increase in 1% steps unlike rod or stud sensors which increase in 25% steps

Screens for EC940 - 4" Display
For the EC940 display, fresh and waste water levels will be shown on two separate screens, press the '>' button to access the second screen
 


Screen for EC970 - 7" Display
For the EC970 display, both fresh and waste water levels will be shown on one screen



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