Contents 1 Preliminary note ���������������������������������������������������������������������������������������������������4 1�1 Symbols used ������������������������������������������������������������������������������������������������4 2 Safety instructions �����������������������������������������������������������������������������������������������4 3 Functions and features ����������������������������������������������������������������������������������������5 4 Function ���������������������������������������������������������������������������������������������������������������5 4�1 Processing of the measured signals ��������������������������������������������������������������5 4�2 Volumetric flow monitoring �����������������������������������������������������������������������������5 4�3 Consumed quantity monitoring (totalizer function) ����������������������������������������5 4�3�1 Consumed quantity monitoring with pulse output ���������������������������������6 4�3�2 Consumed quantity monitoring with preset meter ��������������������������������6 4�4 Monitoring of temperatures ����������������������������������������������������������������������������6...
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9�3�3 Settings for meter reset controlled by the program ����������������������������16 9�3�4 Switch off the meter reset �������������������������������������������������������������������17 9�4 User settings (optional) ��������������������������������������������������������������������������������17 9�4�1 Determine the standard unit of measurement for volumetric flow ������17 9�4�2 Configuration of the standard display �������������������������������������������������17 9�4�3 Setting the damping of the measured values �������������������������������������17 9�4�4 Setting the error behaviour of OUT1 / OUT2 ��������������������������������������17 9�4�5 Selection of the medium to be monitored �������������������������������������������18...
1 Preliminary note 1.1 Symbols used ► Instruction > Reaction, result […] Designation of buttons, switches or indications → Cross-reference Important note Non-compliance can result in malfunctions or interference� 2 Safety instructions • Please read this document prior to installing the unit� Ensure that the product is suitable for your application without any restrictions�...
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 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�...
• Window function / normally open (fig� 2): [OUx] = [Fno]� • Window function / normally closed (fig� 2): [OUx] = [Fnc]� The width of the window can be set by means of the distance between SPx and rPx� SPx = maximum value, rPx = minimum value� HY = hysteresis;...
Factory setting Measuring range scaled I [mA] I [mA] MEW = final value of the measuring range In the set measuring range the output signal is between 4 and 20 mA� It is also indicated: • Volumetric flow above the measuring range: output signal > 20 mA� • Flow rate below the measuring range: output signal between 3�6 and 4 mA�...
In case of turbulances at the inflow side additional baffled pipes (B) are recom- mended: changes to the pipe diameter B = 5 x pipe diameter 90° elbow B = 5 x pipe diameter two 90° elbows, one plane B = 10 x pipe diameter two 90°...
5.4 Installation in pipes Integrate the pipe length so that the direction of flow (1) and the marking arrow (2) show in the same direction� 6 Electrical connection The unit must be connected by a qualified electrician� The national and international regulations for the installation of electrical equipment must be adhered to�...
7 Operating and display elements 1 2 3 4 5 6 7 8 Mode/Enter Set 1 to 8: Indicator LEDs - LED 1 = current volumetric flow in standard cubic feet/minute (scfm)� - LED 2 = current volumetric flow in standard cubic feet/hour (scfh)� - LED 3 = current consumed quantity since the last reset in standard cubic feet (scf)�...
8 Menu 8.1 Menu structure scfm scfh (scf)* °F scfm = [Mode/Enter] / = [Set] = current meter count in standard m )* = stored meter count in standard m...
8.2 Explanation of the menu Maximum / minimum value for volumetric flow, at which OUT1 changes its SP1/rP1 switching status� ImPS Pulse value� ImPR Pulse repetition active (= pulse output) or not active (= function preset meter)� Output function for OUT1 (volumetric flow or consumed quantity): - Switching signal for limit values: hysteresis function or window function, normally open or normally closed�...
9 Parameter setting During parameter setting the unit remains in the operating mode� It continues its monitoring function with the existing parameters until the parameter setting has been completed� 9.1 General parameter setting 3 steps must be taken for each parameter set: Parameter selection ►...
• Change from menu level 1 to menu level 2 ► Press [Mode/Enter] until [EF] is displayed� Mode/EnterSet ► Press [Set] briefly� > The first parameter of the sub-menu Mode/EnterSet is displayed (here: [HI])� • Locking / unlocking The unit can be locked electronically to prevent unintentional wrong settings� ►...
9.2.2 Settings for limit value monitoring with OUT2 ► Select [OU2] and set the switching function: [Hno] = hysteresis function/normally open, [Hnc] = hysteresis function/normally closed, [Fno] = window function/normally open, [Fnc] = window function/normally closed� ► Select [SP2] and set the value at which the output switches� ►...
9.3.4 Switch off the meter reset ► Select [rTo] and set [OFF]� The meter is only reset after overflow (= factory setting)� 9.4 User settings (optional) 9.4.1 Determine the standard unit of measurement for volumetric flow ► Select [Uni] and set the unit of measurement: [SCFm] = flow rate in standard cubic feet / minute�...
9.4.5 Selection of the medium to be monitored ► Select [MEDI] and determine the required medium: - [Ar] = argon� - [CO2] = carbon dioxide� - [N2] = nitrogen� Changing to another medium modifies the set limit values for switching signals and the analogue signal�...
9.6 Setting of the preset meter / pulse value (ImPS) 7 setting ranges are available: indication in steps of value 0 �0 4 0 ��� 9 �9 8 0 0�020 scf 0�040���9�980 scf 1 0 �0 0 ��� 9 9 �9 8 0�02 scf 10�00���99�98 scf 1 0 0 �0...
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► Press [Set] and keep it The flashing digit is increased, 9 is followed by 0 and the first pressed� new digit (left) becomes active� 8 �1 8 3 [Set] permanently pressed 8 �1 9 3 [Set] kept pressed 8 �1 0 3 If digit 1 is increased this way, the display changes to the next higher setting range (9 is followed by 10)�...
10 Operation Correct operation and compliance with the measurement accuracy can only be ensured if the environmental conditions specified in the “Technical data” (→ chapter 12) are adhered to� Ensure that the maximum pressure range, measuring range and permitted operating temperature are not exceeded� After power on and expiry of the power-on delay time (approx� 0�5 s) the unit is in the Run mode (= normal operating mode)�...
10.4 General operating conditions The unit is maintenance-free for media which will not adhere to the measuring probes� • From time to time check the measuring probes visually for build-up� • If necessary, clean them at regular intervals� To do so, use a suitable cleaning liquid (e�g�...
12 Technical data Operating voltage [V] �������������������������������������������������� 19���30 DC to EN50178, SELV, PELV Current rating [mA] ����������������������������������������������������������������������������������������������������2 x 250 Protection: short circuit, reverse polarity, overload Voltage drop [V] ����������������������������������������������������������������������������������������������������������������< 2 Current consumption typ� [mA] ����������������������������������������������������������������������������������������100 Analogue output ������������������������������������������������������4���20 mA; measuring range scaleable Max. load [Ω] �������������������������������������������������������������������������������������������������������������������500 Pulse value ����������������������������������������������������������������������������������������...
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