6
4.2 Volumetric flow monitoring
The flow rate is monitored by a calorimetric measuring system, the measured
signals by the electronics�
• 2 switching signals for volumetric flow limit values can be provided (output 1
and output 2). For the switching functions → 4.5.
• An analogue signal proportional to the volumetric flow (4���20 mA) can be
provided on output 2. For the analogue functions → 4.6.
4.3 Consumed quantity monitoring (totalizer function)
The unit has an internal quantity meter which continuously totals the volumetric
flow� The sum corresponds to the current consumed quantity since the last reset�
• The current meter count can be indicated�
• In addition the value before the last reset is stored� This value can also be
indicated�
The meter saves the totalled consumed quantity every 10 minutes� After a power failure
this value is available as the current meter count� 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�
The meter can be reset as follows:
• Manual reset (→ 9.3.3).
• Time-controlled automatic reset (→ 9.3.3).
4.3.1 Consumed quantity monitoring with pulse output
Output 1 provides a counting pulse if the value set in [ImPS] is reached (→ 9.3.1).
4.3.2 Consumed quantity monitoring with preset meter
2 types of monitoring are possible:
• Time-dependent quantity monitoring
-Settings: [ImPS] = quantity x, [ImPR] = [no], [rTo] = time t�
-If the quantity x is reached during the time t, output 1 switches and remains
switched until the meter is reset�
-If the quantity x has not been reached after the time t, the meter is automati-
cally reset and counting starts again; output 1 does not switch�
• Quantity monitoring not time-dependent
-Settings: [ImPS] = quantity x, [ImPR] = [no], [rTo] = [OFF]�
-If the quantity x is reached, output 1 switches and remains switched until the
meter is reset�
