6
OUT2: 6 selection options
Switching signal for volumetric flow limit value �����������������������������������
(→ 9.2.2)
or switching signal for flow velocity limit value ������������������������������������
(→ 9.2.2)
or switching signal for temperature limit value ������������������������������������
(→ 9.4.1)
or analogue signal for volumetric flow quantity �����������������������������������
(→ 9.2.3)
or analogue signal for flow velocity �����������������������������������������������������
(→ 9.2.3)
or analogue signal for temperature �����������������������������������������������������
(→ 9.4.2)
Instead of an output OUT2 (Pin2) can be used as an input
for an external reset signal: ����������������������������������������������������������������
(→ 9.3.5)
4.2 Volumetric flow monitoring
The flow is monitored by a calorimetric measuring system, the measured signals
are evaluated by the electronics�
• 2 switching signals for volumetric flow limit values can be provided (output 1
and output 2). Switching functions → 4.5.
• An analogue signal which is proportional to the volumetric flow (4���20 mA) can
be provided on output 2. Analogue functions → 4.6.
4.3 Consumed quantity monitoring (totalizer function)
The unit has an internal quantity meter which continuously totals the volumetric
flow quantity� The sum corresponds to the current consumed quantity since the
last reset�
• The current meter reading can be displayed�
• In addition the value before the last reset is stored� This value can also be
displayed�
The meter saves the totalled consumed quantity every 10 minutes� After a
power failure this value is available as the current meter reading� If a time-
controlled reset is set, the elapsed time of the set reset interval is also stored�
So the possible data loss can be maximum 10 minutes�
• Overflow: After the maximum value (9,999,999 Nm³) the meter is reset to 0�
The meter can be reset as follows:
•
Manual reset (→ 9.3.3.).
•
Time-controlled automatic reset (→ 9.3.3).
•
External input signal on pin 2 (→ 9.3.5).
