Signal transmission line for liquid turbine flowmeters - Huaqiang Electronic Network

In order to ensure that the temperature-saturated liquid turbine flowmeter has sufficient sensitivity to the pulse signal output from the flow sensor, the signal-to-noise ratio is increased. For this reason, various electrical interference phenomena, namely electromagnetic induction, electrostatic and capacitive coupling, should be prevented during installation. Therefore, when configuring the signal transmission line, you must pay attention to the following points: Limit the maximum length of the signal line. The maximum length of the signal line is l=dv; where v is the effective value of the output voltage of the sensing coil at the minimum flow rate, mv; d is the coefficient, m/mv, and its value can be: v<1000mv, d=1 0; 1000; vm<d<5000mv, d=1. 5; v>5000mv, d=2.0. +v2r/u6h/k%o'w6j4o$@-s; shielded cables for liquid turbine flowmeter signal transmission lines should be used to prevent inductive noise from the outside. The transmission cable is required to be shielded to ground at the display instrument side. The transmission cable cannot be placed close to strong electromagnetic equipment, and it is not allowed to be arranged with the power line.