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FREQUENTLY ASKED QUESTIONS AND ANSWERS for TF1100 serial transit time ultrasonic flow meter
Q: New pipe, high quality material, and all installation requirements met: why still no signal detected? A: Check pipe parameter settings, installation method and wiring connections. Confirm if the coupling compound is applied adequately, the pipe is full of liquid, transducer spacing agrees with...Read more -
Lanry Relay output introduction
(If portable flow meter needs this functionality, please make a statement when placing orders) Please refer to 4.3.14 Dual Relay Configuration to see Menu Configuration. The relay operations are user configured via the front panel to act in flow rate alarm or error alarm, power supply interruptio...Read more -
TRANSDUCER CABLES
After the transducers A and B inserting into the pipe, the sensor cables should be routed to the transmitter location. Verify that the supplied cable length is sufficient to meet the installation requirements. While transducer cable extension is not generally recommended, if additional transducer...Read more -
What are the problems maybe occur there during the measurement?
1. Readings are erratic and change dramatically, 2. Reading is not accurate and have a big error . 3. Ultrasonic flowmeter sensors are good, but the flow rate is low or no flow rate 4. The measured medium is pure or solid suspended matter too low 5. The coupling between the sensor and the pipelin...Read more -
What is the difference of clamp on ultrasonic flowmeter, inline ultrasonic water meter, insertion ultrasonic flowmeter ?
Different types meter have different advantages . 1 Clamp on ultrasonic flow meter No need to cut the pipe and interrupt process ; Clamp on transducers are just clamped on pipe wall, easy to install ; 2.Inline ultrasonic water meter It can measure the pipe of sparse material , poor acoustic cond...Read more -
Why does clamp on ultrasonic flow meter show weak signal when during flow measurement ?
Clamp on ultrasonic flow meter is suitable for flow measurement in full water pipe, it is easy to install and no contact with liquid directly; It can measure the medium that is not easy to touch or observe. Usually, ultrasonic flowmeter clamp on can work for very long time. When the poor signal...Read more -
What is the class of ultrasonic water meter ?
Water meter’s accuracy is graded for Class 1 and 2. 1) Class 1 water meters (only applicable to Q3≥100m3/h water meters) in the water temperature range from 0.1℃ to 30℃, the maximum allowable error of water meters in the high zone (Q2≤Q≤Q4) is ±1%; The low area (Q1≤Q < Q2) was ±3%. ...Read more -
Advantages and Disadvantages of Doppler Flowmeters
Although Doppler ultrasonic flowmeter is not so accurate as transit time ultrasonic flow meters, Doppler flowmeter can measure dirty liquids ( but it cannot measure clean liquids ), Doppler flow meter can measure sewage flow because sewage is with a lot of solids, at the same time, it is also mea...Read more -
4-20mA output introduction
Many industrial meters choose to use current to transmit signals, because current is not sensitive to noise. The current loop of 4 ~ 20mA is 4mA to represent the zero signal, 20mA to represent the full scale of the signal, and the signal below 4mA and above 20mA is used for the alarm of various ...Read more -
Why is the 4-20MA signal used in industry and not the 0-20MA signal?
The most widely used standard analog quantity electrical signal in industry is to transmit analog quantity with 4~20mA DC current. The reason for using the current signal is that it is not easy to be interfered with, and the internal resistance of the current source is infinite. The wire resista...Read more -
What are the reasons for the difference in readings between the ultrasonic/electromagnetic insertion flowmeter or the turbine flow meter?
1) Firstly, For the working principles of the insertion electromagnetic flowmeter or the insertion turbine flowmeter. Both belong to the point velocity measurement principle, while the ultrasonic flowmeter belongs to the linear velocity measurement principle, and after the velocity distribution c...Read more -
What points should pay attention to when installed insertion sensors ?
When installing insertion sensors, the following points need to be pay attention to. 1) Insertion ultrasonic flowmeter requests: Pipeline pressure shall not be greater than 1.6mpa; 2) Use the Lanry proprietary insertion online installation tool for installation; 3) Do seal well and wrap th...Read more
Ultrasonic Flow Meters
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