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8.4 Signal paths
8.5 Flow limits
In the meter’s working range from min. cutoff and far beyond qs there is a linear connection between the flow rate
and the measured water flow.
In practice the highest possible water flow through the sensor will be limited by the pressure in the system or
cavitation due to too low back pressure.
If the flow is lower than min. cut off or negative, MULTICAL
®
According to EN 1434 the upper flow limit q
402 does not measure any flow.
s
is the highest flow at which the flow sensor may operate for short
periods of time (<1h/day, <200h/year) without exceeding max. permissible errors. MULTICAL
®
402 has no
functional limitations during the period, when the meter operates above q
p
. However, please note that high flow
velocities may cause cavitation, especially at low static pressure. See paragraph 6.5 for further details on
operating pressure.
q
p
2.5…15 m³/h
Triangle
The sound path covers the
measuring pipe in a triangle and
is sent from the transducers
around the measuring pipe via
reflectors.
q
p
0.6…1.5 m³/h
2 parallel tracks
The sound path is parallel
with the measuring pipe and
is sent from the transducers
via reflectors.
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