Question and answer to solve the common problems of ultrasonic flowmeter
Ultrasonic flowmeter in the use of the process, encountered failures are more common, today the flowmeter manufacturer Aister meter in the form of questions and answers to make the common problems of ultrasonic flowmeter to sort out, hope to help you.
Q: Does the ultrasonic flow meter have any requirements for the pipe material? For example, can metal lined PTFE pipes be measured?
A: The external clamp requires the lining to fit the pipe very well, and there is no air gap.
Q: Is the measurement error controllable?
A: It cannot be compared for different occasions.
Q: May I ask, ultrasonic flow meter to a dedicated flow computer, signal type is mADC or digital signal?
A: Trade measurement occasions generally use Modbus or pulse signals.
Q: -40 degrees, refrigerant, external measurement, installed on the test can not be measured.
A: It is necessary to use a large probe to detect the actual signal, or the coupling may have failed at low temperatures.
Q: Measurement of gas phase, HF gas, 300 degrees, can be measured? How to keep safe? Caliber DN250.
A: Need specific selection to determine.
Q: Can ultrasonic flowmeter directly convert heat?
A: It needs to be converted with an integrator.
Q: Are there any strict requirements on the installation Angle? The level? Vertical? Tilt?
A: Horizontal installation is more common.
Q: Can ultrasonic flowmeters be used for pure or medium water?
A: Yes.
Q: Can the ultrasonic flowmeter probe be replaced by itself?
A: Special tools are required and can be replaced by training.
Q: Are there any requirements for measuring the temperature of the environment?
A: -40 to 60 degrees
Q: Which form of factory sewage measurement has the highest accuracy, how does the instrument prevent corrosion?
A: Sewage measurement can be more reliable using electromagnetic flowmeters.
Q: Portable ultrasonic flowmeter, also need to choose different types of flowmeter according to the characteristics of the medium
A: The main thing is to choose a different probe model rather than a converter type.
Q: Why can’t plaster slurry be ultrasounded?
A: The solid content is much greater than the 5% standard
Q: According to the field signal as the criterion, the actual installation distance of the probe is mostly different from the installation distance calculated in the table. Should this situation be based on the field?
A: Not much access to the main site.
Q: Ultrasonic flowmeter operating temperature range?
A: External medium temperature -40 degrees to 120 degrees.
Q: Why are the flow computers and ultrasonic flowmeters on our site (natural gas distribution) configured one-to-one? That is, an ultrasonic flowmeter only communicates with a flow computer.
A: This is to consider the reliability of the system operation, one-to-many configuration if the traffic computer damage will cause multiple channels can not be measured.
Q: Can gypsum slurry be measured?
A: Ultrasound is not allowed.
Q: What factors should be considered when setting the range of the plug-in and external clamp ultrasonic flowmeter, or is there a calculation formula?
A: The range setting is mainly determined by the actual maximum flow range, which can generally be determined by multiplying the flow rate and cross-sectional area.
Q: Can be applied to the minimum pressure pipeline gas metering.
A: Depending on the specific working conditions, generally to the micro negative pressure.
Q: Does the signal need to be squared in the secondary table?
A: No need.
Q: Can the measurement medium be a mixture of multiple substances?
A: As long as it is a well-mixed solution.
Q: The transducer itself can withstand 200 degrees, how to measure the maximum temperature of 600 degrees?
A: Isolation of high temperature by wave guide rod.
Q: For measuring liquids, is it necessary to mount vertically with the liquid flow upwards to avoid bubbles in the liquid?
A: This is the best installation.
Q: Do vibration and strong magnetic fields affect the measurement results?
A: Vibration has a greater impact on the stability of the flow rate, and will eventually lead to a significant increase in errors.
Q: What is the standard signal output? If you need RS485, pulse need to be customized or standard?
A: It needs to be customized.
Q: How many ultrasonic flowmeters can be connected to a flow computer?
A: Depending on the specific configuration, the traffic computer in Cologne is 5 channels.
Q: Is the accuracy of ultrasonic flowmeter uniform over a wide range of processes?
A: It’s generally linear.
Q: Can explosion-proof sites be used? What are the protection certifications?
Answer: It can be used. IECEx, ATEX, NEPSI are available.
Q: Can this flowmeter be used for mud-water mixtures?
A: Not suitable for the time difference method of ultrasonic flowmeter.
Q: Does the installation position of the external clamp need to be adjusted under different working conditions? What if we don’t adjust the meter?
A: According to the calculation results of the converter, there may be no signal without adjustment, which is no way.
Q: For the old pipeline due to corrosion caused by the inner wall of the uneven and medium coking, crystallization of the product does not affect the normal use of the product?
A: Yes.
Q: What is the ambient temperature range of the flow meter?
A: The converter is -40~60℃.
Q: How long is the calibration cycle?
A: It is recommended to check once a year.
