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Window
Nm
3
/h
set point 1
set point 2
1
NO (activate to close)
0
1
NC (activate to open)
0
‚
5.1.6.
Output mode – pulse
If output 2 is configured for pulse, the measurand can be consumption only. Under "Pulse", the duration of the
pulse and the pulse value (Significance level of pulse) can be freely configured.
Volume Flow [m
Pulse Value [m
3
The duration of the pulse can be set between 0.02 and 2 seconds.
The pulse – interval – ratio must be at least 1 : 2, meaning that the duration of the pulse interval must be at
least twice the duration of the pulse itself.
OUT 2
≥ 2 s
1/3
min. 2/3
Calculation of the minimum "pulse value" or the maximum "pulse duration".
IMPW_MIN = NORMV_MAX [m
IMPL_MAX = IMPW [m
IMPW
IMPL
IMPW_MIN
IMPL_MAX
NORMV_MAX
5.2.
Minimum flow shutdown
The minimum flow shutdown is switched on and off using the "active" checkbox.
If the output signal is ≤ than the set "Shutdown value", the flow meter issues 0 on the analogue output.
The relay is activated as long as the measuring value is
between the values of set point 1 and set point 2.
The hysteresis of each set point is fixed at 0.2% of the meas-
uring range.
e.g.: set point 1 = 100 Nm
t
ƒ
„
‚
ƒ
„
/h]
Number of Pulses
3
=
/Pulse]
Hour
e.g. Duration of pulse = 100ms; one pulse for each Nm
/h] * IMPL [s] / 1200
3
] * 1200 / NORMV_MAX [m
3
pulse value [m
]
3
pulse length (duration) [s]
minimum pulse value [m
]
3
maximum pulse length (duration)
expected maximum volume flow (Nm
3
hysteresis of each set point is 1 Nm
80 Nm
/h = set point 2
3
100 Nm
/h = set point 1
3
99 Nm
/h = set point 1 - hysteresis
3
79 Nm
/h = set point 2 - hysteresis
3
t
/h]
3
/h)
3
27
/h; set point 2 = 80 Nm
3
/h (0.2% of 500 Nm
3
consumed
3
/h;
/h)
3
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