<V mode installation>
If pipe is large in diameter (over 1000mm) or very old (scale or corrosion
inside), please use Z MODE installation. These pipes can sometimes make
the ultrasonic signal very weak, so flowmeter cannot work in V mode. Also, in
the case that liquid is not clean, for example wastewater, please use Z MODE.
<Z mode installation>
The Z MODE make ultrasonic signal stronger than V MODE.