>> Ultrasonic Flow meter User Manual
26
>> Scaling
The inside scaling would have bad effect on ultrasonic signal transmission, and would
decrease the inner diameter as well. As a result, the measurement accuracy can not be guaranteed.
Please try to avoid choosing the installation point with inside scaling.
>>Temperature
The liquid temperature on installation point should be in the working range of transducers.
Please try to choose the point with lower temperature. Avoid to choose points like the outlet of
boiler water and heat exchanger. Return water pipe would be better.
Temperature range of standard clamp on and insertion transducers: -30 ~ 90
℃
Temperature range of high temperature clamp on and insertion transducers: -30 ~ 160
℃
>>Pressure
The maximum pressure for standard insertion and inline transducer is
1.6MPa
Out of this range need customized.
>>EMI (electromagnetic interference)
The ultrasonic flow meter, transducer and signal cable can be easily interfered by interference
sources such as frequency changer, radio station, microwave station, GSM base station and
high-tension cable. Please try to avoid these interference sources when choosing installation
points.
The shield layer of flow meter, transducer and signal cable should be connected to earth.
Better to use isolated power supply. Do not use the same power supply with the frequency
converter.
>>Instrument well
When measuring underground pipes or need to protect the measuring points, an instrument
well is required. To ensure the enough installation space, the sizes of instrument well should meet
the following requirements.
D means the pipe diameter
