Intelligent electromagnetic flowmeter First, the electrode contact resistance measurement measurement, the electrode and the liquid contact resistance value, can estimate the juice electrode and the surface condition of the liner layer indirectly without unloading the flow sensor from the pipeline, help to analyze the cause of the fault.
Measuring the contact resistance of the electrode and the liquid can indirectly evaluate the general condition of the surface of the electrode and the lining layer without removing the flow sensor from the pipe, which is helpful for analyzing the cause of the failure. In particular, the inspection of large-diameter electromagnetic flowmeters is greatly facilitated. This method can be used to estimate the internal surface conditions of the flow sensor measuring tube, such as whether the electrode and the liner layer are deposited, whether the deposited layer is conductive or insulating, and the surface contamination of the electrode.
Second, the polarization of the electrode voltage measurement Polarization voltage between the electrode and the liquid will help determine whether the zero point instability or output sloshing caused by the electrode is contaminated or covered. With a digital multimeter 2V DC gear, measure the polarization voltage between the two electrodes and the ground (the electromagnetic flowmeter can be measured without interruption or blackout). If the two measurements are nearly equal, the electrode is not contaminated or covered, otherwise the electrode is contaminated or covered. The magnitude of the polarization voltage is determined by the "electrode potential" of the electrode material and the nature of the liquid. The measured value may be between a few mV and a few hundred mV. Because the two electrodes are actually contaminated during operation, it is not possible to be completely symmetrical, so the voltage across the two electrodes forms an asymmetric common-mode voltage. The asymmetric common-mode voltage becomes a differential mode signal, causing a zero offset.
Third, the determination of signal cable interference Signal cable by the external electrostatic induction and electromagnetic induction interference will make electromagnetic flowmeter zero changes. To determine whether the zero point change is due to signal cable interference potential influences, it is necessary to determine the general scope of the interference and the degree of influence on the electromagnetic flowmeter.
Fourth, determine whether the ground potential electromagnetic flow juice in the normal use of the process, such as the sensor near the electric (force) machine status changes (such as leakage), ground potential will change and cause zero changes. Check if there is any influence in this way. Short circuit the converter's working ground C terminal and protective grounding G terminal, and judge whether there is a grounding potential by changing the zero point (or indication value).
V. Distinguishing the stray current flow of the pipeline Sometimes the disturbance source for finding the spurious of the pipeline is still at the downstream of the flow sensor to narrow down the search range and try to reduce or eliminate the influence of stray current interference.
Intelligent electromagnetic flowmeter
Category:
Tooling for special tooling / fixtures / general standard tooling (similar to standard).
Fixture,or Mechanical Fixtures,as its name implies, is used to clamp the workpiece clamping device (or guide tool).
Die: the device to define the shape and size of the production object.
The tool: use in mechanical manufacturing tool basically used for cutting metal materials, so the "tool" is generally understood as metal cutting tools,like Diamond Tools.
AIDS: generally refers to connect tool and machine tool.
Instrument: use various devices to store the production of objects or tools at work or in the warehouse.
Check gauge: equipment inspection in the production use.
Fixture: manufacturing systems, the word corresponding to fixture, sometimes work with synonyms, sometimes also refers to the general fixture, Taiwan / Japanese / Korean electronic enterprises to use the word. Belongs to the fixture industry A containing fixture, belonging to a subordinate relationship.
Application:
The fixture is used for machining workpiece fastening quickly, when the machine tool, workpiece holding device, process correct relative position. That is to say workholding fixture processing machinery is an indispensable component in the machine tool technology to high-speed, efficient, precise, complex, intelligent, environmental protection direction driven by the fixture technology towards high fine, efficient, module combination, general economic development. Also called fixture fixture. Broadly speaking, any process, in the process for rapid, convenient and safe installation device of the workpiece can be called the fixture. Such as welding fixture, test fixture, assembly jig, fixture and so on. The fixture is the most common, often referred to as the fixture. In the processing machine parts, in order to make the surface of the workpiece to achieve drawing size requirements, geometry and other surface the mutual position precision, before processing The workpiece must be installed (location), to (clamp). Application of machine tool fixture, to ensure the machining accuracy, stable product quality; to improve labor productivity and reduce costs; improve the working conditions of workers, to ensure safe production; to expand the scope of machine tool technology, to achieve a "machine" the positioning element (usually by the fixture. Determine the correct position of a workpiece in the fixture), clamping device, tool guide element (to determine the tool and workpiece relative position or direction guiding tool), indexing device (processing, so that the workpiece can complete the number of stations in a single setup of the rotary indexing device and mobile line dividing device two), connecting element and fixture (jig base) and other components.
Toolings And Fixtures,Mechanical Fixtures,Production Toolings,Diamond Tools
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