ULTRAFLOW® 54 DN15-125
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Kamstrup A/S · Technical description · 5512-2464_D1_GB_09.2021
q
p
Meter factor
Flow at 125 Hz
[m³/h]
[p/l]
[m³/h]
0.6
300
1.50
1.5
100
4.50
2.5
60
7.50
3.5
50
9.00
6
25
18.0
10
15
30.0
15
10
45.0
25
6
75.0
40
5
90.0
60
2.5
180
100
1.5
300
Table 25. Flow at saturation (125 Hz).
According to EN 1434, the upper flow limit q
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. ULTRAFLOW® has no functional limitations
during the period when the flow sensor operates above q
p
.
Note, however, that high flow velocities may cause cavitation, especially at low static pressure. See paragraph
7.4
Pulse emission
Pulses are emitted at 1-second intervals. The number of pulses to be emitted is calculated every second. Pulses are
emitted in bursts with a pulse duration of 2…5 ms and pauses depending on
the current pulse frequency. The duration
of the pauses between the individual bursts is approx. 30 ms.
The transmitted pulse signal is the average determination of a series of flow measurements. This means that there will
be a transient phenomenon until correct flow signal has been obtained during start-up. Furthermore, this brings about a
pulse tail of up to 8 seconds in case of sudden hold.
7.5
Supply of ULTRAFLOW®
Normally, ULTRAFLOW® is supplied either via the connected MULTICAL® calculator or Pulse Transmitter/Pulse Divider.
When ULTRAFLOW® is supplied in any other way, for example via direct connection in a flow bench, the following applies:
Supply voltage of ULTRAFLOW®:
3.6 VDC ±0.1 VDC
The current consumption of ULTRAFLOW®:
Max average
50 µA
Max current
7 mA (max 40 ms)
