Version With Pulse Output And Current Output - Burkert 8012 Manuel D'utilisation

5.2.3. Version with pulse output and
current output
pulse output
The characteristics of the pulse output are identical to those on a
version with pulse output only. See chap. 5.2.2.
current output
The current output on the basic versions is connected in sink mode
and delivers a current I, an image of the rotation frequency f of the
paddle-wheel:
I = 8f/125 + 4
As f = KQ, the flow Q is therefore proportional to this current:
mA
20
Q =
4
Flow rate
0
Q
current attenuation variations
When the flow varies quickly, the current output signal from your
device can be stabilised. On the basic versions, the current variations
are slightly attenuated.
Generation of an alarm current (versions with optical sensor
only)
On the basic versions, an "alarm" current of 22 mA is generated when
the circulation direction of the fluid is the opposite of the direction of
the arrow on the side of the housing.
10
Q: flow rate [litre/s]
K: K factor [pulse/litre]
125
(I - 4)
l: current [mA]
8K
English
Type 8012
Generalinformation
Table 2 : Current output data
characteristic possible configurations (on
request)
Wiring • source
• or sink
Current output • 4-20 mA, corresponding to
range and asso- the rotation frequency range
ciated measuring 0-250 Hz of the paddle-wheel
range (see above)
• or 4-20 mA, corresponding to a
flow range, in the unit specific to
the application (see chap. 9.3.1)
• or 4-21.6 mA, corresponding
to the rotation frequency range
0-275 Hz of the paddle-wheel
(see chap. 9.3.1)
• or 4-21,6 mA, corresponding
to a flow range, in the unit
specific to the application (see
chap. 9.3.2)
Current atte- Ten possible attenuation levels:
nuation variations ranging from "no attenuation" to
"maximum attenuation" (see chap.
9.3.3)
configuration
on a basic
version
sink
4-20 mA, cor-
responding to
the 0-250 Hz
rotation
frequency
range of the
paddle-wheel
Slight atte-
nuation of
the current
variations