Follow the quick start guide. It is included with your order and can also be found under each product and at the bottom of this page. Double-check that all values in menus 10–14 are correct. Also, watch the installation video under each product. It is also available at the bottom of this page.
Check the letter in the upper right corner of the display.
"R " indicates that the meter is set correctly in menus 10–14
"E" means there is no signal between the sensors. Verify the settings in menu 10-14
"D" indicates a weak signal between the sensors and that the meter is attempting to adjust the gain between the sensors. Move one of the sensors slightly
Start by checking the values you entered in Menu 10-14 to make sure they are correct (plastic = PVC). Double-check what is written in the quick start guide.
Sand the pipes to remove paint, rust, or buildup. Fill with grease until it overflows. Do not tighten too much, or the grease will be forced out.
If the sensor is at the correct distance according to Menu 14, try adjusting the sensor a few millimeters at a time.
Is the pipe full? If there is too little liquid in the pipe, it cannot be measured using ultrasound. The liquid must cover the sensors. This is a common problem with sprinkler systems.
Are there any bends, valves, pumps, etc., near the meter?
The recommended distance is 10 times the pipe diameter upstream and 5 times the pipe diameter downstream of the meter
Older pumps can cause turbulent water flow; in that case, increase the distance to 30 times the pipe diameter upstream and 10 times the pipe diameter downstream
If nothing works, there is likely air or turbulence in the pipe. Turn off the flow and perform a zero-flow calibration in Menu 22. Then try again. If the Q value is correct, there is air in the system and it needs to be vented.
Move the sensor a few millimeters at a time along the pipe until its ratio reads between 97-103%.
Go to Menu 04. The signal strength should be above 80 (UP, DN) and Q should be between 60 and 100. Go to “Sound,” where the value should be between 97 and 103%. If these values are correct and an “R” appears in the upper right corner, the meter is installed correctly.
Menu 04 shows the correct Q value (between 60 and 100) and Ratio (should be between 97 and 103%), but no flow is shown in Menu 01. The flow is likely less than 0.03%. Adjust the value down in Menu 21 (low-flow cut-off) and see if that works. If it shows a flow rate, the pipe is too large for the flow rate. If possible, reduce the pipe size to increase the flow rate.
I placed the gauge on top of the pipe, not in the middle of it. This is a problem if the system is not pressurized; otherwise, it's fine in a pressurized system.
If the tubes are not completely filled, the measurement will be incorrect. Go to menu 26 and change the scaling factor. It is set to 1. If the tubes are ¾ full, change it to 0.75.
The Modbus protocols are listed at the end of the manual. Modbus settings in Menu 30:
The default communication settings are 9600 baud (can be changed), no parity (None, cannot be changed), 8 data bits, 1 stop bit, and 1 start bit. The default Modbus address is 55 (can be changed):
See the information on registers at the end of the manual.
M-bus is an optional feature and must be selected when placing an order
Settings in Menu 32
Testing the analog output in Menu 32 under the "Check" tab
Different liquids and temperatures have different acoustic properties. Refer to our documents for the acoustic properties of various liquids. Enter the speed of sound for the selected liquid in Menu 12.
The flow meter is calibrated for water at 20 degrees. If the water temperature is higher than around 80 degrees, adjust it according to the document.
Perform this in Menu 22. Make sure the tube is filled with liquid and that the liquid is at rest in the tube. Zero-flow calibration takes about 30 seconds to complete. If it doesn't work the first time, try it again.
Check that the correct parameters are used in Menu 10-14
Check Menu 04, the "Sound" tab, to ensure that the "Ratio" value is between 97-103%
Check that zero-flow calibration has been performed
Is the flow meter's sound velocity set to the correct fluid and temperature?
Note: All flow meters have some degree of inaccuracy, so it is very difficult to get two meters to show exactly the same flow/energy
If the checks above are correct, the meter is installed properly. Proceed then to check the permanently installed meters. Permanently installed meters may need to be calibrated after a few years
