Page 1
Variable-Area Flowmeter Operating Instructions Betriebsanleitung bitte durchlesen und an einem sicheren Ort aufbewahren! Operating Manual K12 Heinrichs Messtechnik GmbH January 2021...
Heinrichs Messtechnik GmbH Applications The flow meter is suitable for the measurement of the flow of liquid and gaseous products in pipes. It displays the current flow in volume or mass per unit time. Applications: Measuring the flow of liquid and gaseous products in pipes as well as dosing, superimposing, monitoring, regulating and the controlling of them.
Heinrichs Messtechnik GmbH Operational mode and system design K12 Float principle: The product flows vertically through the meter from the bottom to the top. The height of the float in the measuring tube is a measure of the flow quantity. The float is in equilibrium between the buoyant force of the flowing medium and the counteracting force of gravity on the float.
Heinrichs Messtechnik GmbH Input Measured variable Volume flow Measuring ranges (lower-range and upper-range values) Measuring span water 20 °: Smallest measuring range: 0.02-0.25 l/h water Largest measuring range: 16-160 l/h water Measuring span air 20 °C, 1.013 bar abs. Smallest measuring range: 0.5-5.0 Nl/h air Largest measuring range: 500-5000 Nl/h air Measuring /regulating range for K12-..V / N Span: 10-100 %...
Heinrichs Messtechnik GmbH Conditions of use The VDI/VDE guidelines must be observed. The devices can be used for: liquid products that are sufficiently free-flowing, are free of solids, do not bond or do not tend to settle. gases with linear flow behaviour and an adequate inlet pressure. V/N (optional differential pressure regulator) The minimum differential inlet and outlet pressures must amount to 350 mbar.
Heinrichs Messtechnik GmbH 7.1.4 Mounting and commissioning When installing and commissioning the flowmeter, the following points must be observed: a) The variable-area flow meter must be installed perpendicularly (bottom-up direction of flow). b) Take special care to install glass-tube devices free from strain. c) The size of the product line to be connected must be identical to the size of the device connection.
Heinrichs Messtechnik GmbH Fluid conditions 7.3.1 Fluid temperature ranges without limit switch -20 °C to + 100 °C with limit switch -20 °C to + 70 °C Risk of breakage due to frost 7.3.2 Fluid pressure limit Max. 16 bar (20 °C) Important: All pressure values are for non-hazardous liquids and for devices installed free from strain.
Heinrichs Messtechnik GmbH Construction details Construction/dimensions K12 The meter consists of a conical measuring tube made of borosilicate glass, with a vertical movable float made of stainless steel or glass glass (optionally, for types K12-L/E, the float may be made of aluminium).
Heinrichs Messtechnik GmbH Design / Dimensions / Commissioning V / N (option diff. pressure regulator) Differential pressure regulators are used to achieve constant flow values at variable inlet and outlet pressures. Caution! Differential pressure regulators are not pressure reduction valves The measuring device consists of a variable area flowmeter with control valve and mounted differential pressure regulator.
Heinrichs Messtechnik GmbH Electrical connection for limit transducer option with cable end length of 2 m The limit switch (ring form) can be adjusted alongside of the measuring tube. It is fixed via two screws (1) at the back wall of the unit. Adjusting of the contact: -unscrew the fixing screw (1) -move contact (2) to bottom or top...
Heinrichs Messtechnik GmbH 11 Use in hazardous areas Only devices with Ex-markings may be operated within areas with potentially explosive atmospheres. Ambient temp. Process-Temp. Marking Zone Description -20 °C ...+70 °C -25 °C ...+70 °C II 2G Ex h IIC T6 Gb With built-in switch, II 2D Ex h IIIC T85°C Db observe the type...
Heinrichs Messtechnik GmbH If grounding cannot be guaranteed via the process connections (e.g. plastic process connections), the flow meter must be connected to the local ground potential via the flanges. This connection only ensures electrostatic grounding of the device and does not meet the requirements for equipotential bonding.
Heinrichs Messtechnik GmbH 12 CE mark The measuring system meets the statutory requirements of the following EU directives: 2014/34/EU (ATEX) Equipment for Use in Potentially Explosive Atmospheres 2014/30/EU (EMC) Electromagnetic Compatibility. With respect to the Pressure Equipment Directive 2014/68/EU, the devices fall within the scope of application of Article 4, Paragraph 3, and therefore requires no CE marking in accordance with this directive.
Heinrichs Messtechnik GmbH 16 Safety instructions 16.1 Intended use The K12 variable-area flowmeter may be used only for flow measurements of fluid and gaseous media. The manufacturer shall not be liable for damage that may result from improper or unintended use. When dealing with an aggressive medium, the material durability of all wetted parts is to be clarified.
Heinrichs Messtechnik GmbH 18 Maintenance If you use the meter in the intended manner no special maintenance is required. However, the variable area flow meter should be checked in the context of the routine maintenance of the facility and the pipelines.
Heinrichs Messtechnik GmbH 18.1.3 Abbildungen des Aus- / Einbaus Clamping ring Attention! The shaft packing of the valve must be readjusted during the life cycle. This requires tightening of the thrust piece (1) Loosen grub screw (2) M4x8 with hexagon 2mm and remove valve knob (3).
Heinrichs Messtechnik GmbH 19 Returning devices for repair and service Note: In accordance with the applicable waste disposal legislation, the owner/client is responsible for the disposal of special waste and hazardous materials. Consequently, all devices sent to Heinrichs Messtechnik for repair must be free of any hazardous materials. This also applies to possible cavities and fissures in the devices.
Heinrichs Messtechnik GmbH 20 Decontamination certificate for device cleaning Company name: ................Address: ..................Department: ................Contact person: ............... Phone: ................... The enclosed variable-area flowmeter, Model ..........................was operated using the following fluid: ............................................In as much as this fluid is water-hazardous / toxic / corrosive / combustible / a health hazard / environmentally hazardous we have performed the following steps: ...
Air (Nl/h) 50-500 Air (Nl/h) 80-800 Air (Nl/h) 100-1000 Air (Nl/h) 180-1800 Labeling Air (Nl/h) 240-2400 Heinrichs Air (Nl/h) 300-3000 Kobold Air (Nl/h) 400-4000 neutral Air (Nl/h) 500-5000 Special 0,25-2,5 Marking O: (l/h) 0,5-5 O: (l/h) 1,2-12 st.st. plate 40x20mm...
Need help?
Do you have a question about the Heinrichs K12 and is the answer not in the manual?
Questions and answers