5
UK
3 Functions and features
The unit monitors the standard volume flow of gases�
It detects the 3 process categories volumetric flow, consumed quantity, medium
temperature�
Applications:
• argon (Ar)
• carbon dioxide (CO2)
• nitrogen (N2)
Selection of the medium to be monitored → 9.4.5.
All data refer to standard volume flow according to DIN ISO 2533, i�e� volume flow
at 1013 hPa, 15°C and 0% relative air humidity�
The general operating conditions of gas filled equipment apply�
4 Function
4.1 Processing of the measured signals
• The unit displays the current process values�
• It generates 2 output signals according to the parameter setting�
OUT1: 3 selection options ����������������������������������������������������� parameter setting
switching signal for volumetric flow limit values ���������������������������������� (→ 9.2.1)
or pulse sequence for totalising meter ������������������������������������������������ (→ 9.3.1)
or switching signal for preset counter ������������������������������������������������� (→ 9.3.2)
OUT2: 2 selection options
switching signal for volumetric flow limit value ����������������������������������� (→ 9.2.2)
or analogue signal for volumetric flow ������������������������������������������������ (→ 9.2.3)
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�
