and 5 times back of pipeline diameter.
F. The measure distance of tangential path behind valve should comply
with 50times front and 5 times back of pipe diameter.
G. Suggest that install probe perpendicularly by pipeline, shouldn’t be
installed in the bottom of pipeline.
H. Probe can be installed in perpendicular pipeline which is upward flow
direction, but also shall meet the above line requirement.
I. Probe can not be installed in perpendicular pipeline which is
downward flow direction.
J. The water in tested pipeline should be full. Make sure no air in the
pipeline.
Repair and maintenance of flow meter:
A. Before the installation of probe need confirm the impeller in free
rotating, there is no obvious block phenomenon.
B. When the flow meter stops measuring but the tested liquid still flow, it
can check the work mode of probe online. Screw the probe nut A out,
and check the working condition of the diode on the back of probe. If the
diode always light on or off, it indicates the impeller in pipeline stop
rotating. It shall stop pipeline working, release pressure in pipeline, and
dissemble the probe to check if there is any foreign matter impact
impeller rotating. After cleaning, if it can rotate normally by manually,
and the diode works normally, it can continue to use after confirming the
installation correct.(As Figure 1-3)
C. If the probe has impeller broken, the top bracket of probe damaged,
bearing bended, after repairing but still unable to free rotation or the
wetted part has corrosion, or the installation screw thread serious
damaged, it shall replace a new probe.
D. If the diode on the back of probe works normally, but the display
board shows incorrect, please check if the probe wire has any damage
and use a multi-meter to check the voltage between shielding and black
wire if normally. If the diode light on, there is no voltage output; and if
the diode light off, there is voltage output.
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