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 the screen readings and the transducers are installed in the right direction.
Q: Old pipe with heavy scale inside, no signal or poor signal detected: how can it be resolved?
A: Check if the pipe is full of fluid. Try the Z method for transducer installation （If the pipe is too close to a wall, or it is necessary to install the transducers on a vertical or inclined pipe with flow upwards instead of on a horizontal pipe).Carefully select a good pipe section and fully clean it, apply a wide band of coupling compound on each transducer surface (bottom) and install the transducer properly. Slowly and slightly move each transducer with respect to each other around the installation point until the maximum signal is detected. Be careful that the new installation location is free of scale inside the pipe and that the pipe is concentric (not distorted) so that the sound waves do not bounce outside of the proposed area. For pipe with thick scale inside or outside, try to clean the scale off, if it is accessible from the inside. （Note: Sometimes this method might not work and sound wave transmission is not possible because of the a layer of scale between the transducers
and pipe inside wall）.
Q: Why is the CL output abnormal?
A: Check to see if the desired current output mode is set in Window M54. Check to see if the maximum and minimum current values are set properly in Windows M55 and M56.Re-calibrate CL and verify it in Window M53.
Q: Why is the flow rate still displayed as zero while there is fluid obviously inside the pipe and a symbol of “R” displayed on the screen?
A: Check to see if “Set Zero” was carried out with fluid flowing inside the pipe（Refer to TF1100-EP ultrasonic portable heat meter manual TF1100 44 Window M42）. If it is confirmed, recover the factory default in Window M43.
Q: With a poor measurement site environment in the plant and the voltage and power supplies fluctuating widely, is the instrument really able to keep running 24 hours a day repeatedly without stopping and last for several years under such conditions?
A: TF1100 is designed to work with high reliability under such conditions. It is provided with an intelligent signal conditioning circuit and internal correction circuitry. It will work under strong interference conditions and is able to adjust itself with strong or weak sound waves. It will work in a wide band of voltage: 90-260VAC or 8V~28V DC voltage.
Q: Why is the pipe not full of liquid or no flow in pipe, but still displays an unstable or wrong reading?
A: Pipe must be full of liquid, if not, ENTER the menu window M29, setup a EMPTY PIPE Q VALUE less than normal Q value (pipe is full of liquid), cut off abnormal reading, TF1100 will display Zero reading.
Post time: Nov-28-2022