IFM Electronic efector300 SD5000, Руководство по эксплуатации

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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).
4.3.1 Consumed quantity monitoring with pulse output
Output 1 provides a counting pulse each time the value set in [ImPS] is reached
(→ 9.3.1).
4.3.2 Consumed quantity monitoring with preset counter
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 via the digital input or [rTo] = [rED�T]�