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 (the “Install” menu in the LRF-3000 Ultra). 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 (the "Install" menu in the LRF-3000 Ultra)
"E" means there is no signal between the sensors. Verify the settings in menu 10-14 (the "Install" menu in the LRF-3000 Ultra).
"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 that the values you entered under "Instal" are correct (plastic = PVC). Double-check what's in the quick start guide!
Sand the tubes if there is paint, rust, or a coating. Fill with ultrasonic grease until it overflows. Do not tighten too much, or the grease will be squeezed out. It is important to use grease specifically designed for ultrasonic applications.
The sensors must be mounted in the middle of the pipe at the 9 o'clock or 3 o'clock positions, aligned with each other. Measurement method Z: the sensors must be mounted at the 3 o'clock and 9 o'clock positions
Correct sensor spacing according to "Instal" "Instal spacing" in step 6 – try adjusting one sensor a few millimeters at a time
The distance is measured from inner edge to inner edge in mm
The label should face outward, and the cables should run outward from each other, right to left
Börja med V metoden upp till DN200-byt och till Z metoden om ej fungerar. Mätmetod Z kan vara lämplig att användas på rör < DN32 Finns det böjar/ventiler/pumpar, etc i närheten av givarna? Rekommenderat avstånd är 10xrördiameterna framför första givaren och 5Xrördiametern efter nedströmsgivaren Äldre pumpar kan skapa turbulent vatten, öka då avståndet till 30x uppströms och 10x nedströms
Move one of the sensors a few millimeters at a time along the tube until the ratio reads between 97-103% (Step 8, under "Result" - total)
Go to "Result," step 7, in the quick start guide. The signal strength should be above 80 (UP, DN) and Q should be between 60 and 100. Continue to "Result," where the total should be between 97% and 103%. If these values are correct, the meter is installed properly.
The "Result" menu shows the correct Q value (between 60-100) and Ratio (should be between 97-103%), but no flow is shown in the "Result" menu
The likely cause is that the flow rate is less than 0.03 m/s.
Adjust the low-flow cutoff in the "Adjust" menu—set the low-velocity cutoff to a lower value.
The Z-method. It has a Sound value of 80 but a Q-value of 0 even when the transducers are moved. If there is too little liquid in the pipe, ultrasonic measurement is not possible. The liquid must cover the transducers. The Z-method is suitable for use in sprinkler applications.
If the tubes are not completely full, measurement errors will occur. Go to menu 26 and change the scaling factor. It is set to 1. If the tubes are 3/4 full, change it to 0.75.
Go to the "Adjust" menu. 1. 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.
Settings in the "Output" Menu 3
The Modbus protocols are listed at the end of the manual. Modbus settings in "Output" 1
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. Default Modbus address: 55 (can be changed)
See the information on registers at the end of the manual
M-Bus is optional; please specify this when ordering
Different fluids and temperatures have different acoustic properties. Please refer to our documents (found under "Documents" for each product) for the acoustic properties of various fluids. Enter the speed of sound for the selected fluid in the "Instal" menu—medium—step 3
The flow meter is calibrated for water at 20 degrees
Check that the correct parameters are used in the "Instal" menu
Check in the "Result" menu to ensure that the value ratio 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 difficult to get two meters to show exactly the same flow rate or energy consumption.
If the above checks are correct, the meter is installed properly. Proceed to check the permanently installed meters. Permanently installed meters may need to be calibrated after a few years.
Ultrasound is affected by turbulence. Therefore, the sensors must be mounted at a certain distance from a bend, curve, pump, etc.
Generally, this distance is 10 times the pipe diameter in front of the first sensor and 5 times the pipe diameter behind the second sensor. If one must be prioritized, the distance in front of the first sensor is the most important. This is described in detail in the manual on page 15. The manual is available under “Product” and “Documents.” See also the bottom of this page.
