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Output
20,5mA / 10,3V
20mA / 10V
10mA / 5V
0mA / 0V
Value for 0mA
Value for 0V
Output behaviour 0-20 mA and 0-10 V
10.6.2.3
For all analogue outputs (current and voltage), the output behaviour can be
activated according to NAMUR recommendation NE43. When the function is
activated, e.g. the linear output of the 4 to 20 mA signals to 3.8 to 20.5 mA.
Above 20.5 mA, the current value jumps to approx. 22 mA to signalise a
measuring range overshoot. Current output values between 3.8 and 4.0 mA
indicate that the measuring range is undershot. The output of approximately
3.6 mA signals a device or process fault (e.g., empty tube signalling).
10.6.3
FM100 flowmeter provides a scalable pulse output. When the pulse output is
activated, the cyclically incoming volume is available as a pulse train at the
output. The pulse width of the pulse output is constant and can be set in a range
of 1 ms up to 20 s. The pulse output is updated in a cycle of 20 ms. At the
beginning of each update, it is determined how much volume has been
accumulated during the previous update period. According to this amount and the
set pulse volume, the corresponding amount of pulses is available as a pulse
train at the output.
The pulse signal is not suitable for determining the volume flow with an
external frequency measurement.
The reaction time of the pulse output is directly dependent on the flow
parameter "separation" (cutoff). The shortest reaction time is reached if this
parameter is set to the value "0.0" (factory setting: start of measuring
range).
A5E48762204-AA
22mA / 11V
Value for 20mA
Value for 10V
Activation of behaviour according to NAMUR
recommendation NE43
Pulse output
(overflow)
NAMUR Standard disabled
Meas. value
SITRANS FM100
page 31
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