When the electromagnetic flowmeter is not in use when it is stopped, we must adopt scientific and reasonable maintenance and maintenance methods for the electromagnetic flowmeter. Many people find that after using the electromagnetic flow meter for a period of time, use it again to find inaccurate measurement data. In fact, this is not a problem with the quality of the electromagnetic flowmeter itself. This is because the user did not follow the instructions in the manual for maintenance and maintenance.


A, zero point inspection and adjustment of electromagnetic flowmeter maintenance


Before the electromagnetic flowmeter is put into operation, the zero point must be adjusted when the electromagnetic flow sensor is filled with liquid static state. After the start of operation, zero-point check shall be performed for the use conditions to stop the flow regularly; in particular, for precipitation and easy-to-pollution electrodes, non-clean liquids containing solid phases shall be inspected at the initial stage of operation to obtain experience and determine the normal inspection cycle. Exciting electromagnetic flowmeters and square wave impulse ratios are more likely to cause zero drift, so more attention should be paid to inspection and adjustment.


An example of an application error in which two deposition layers are faulty. One is the oil drilling cementing project, the total flow of injecting cement slurry is an important process parameter, often using high-pressure electromagnetic flowmeters. The meter is used intermittently. The sensor tube is flushed with fresh water after completion and the rest is empty. Due to incomplete cleaning, the residual cement slurry on the inner surface of the measuring tube solidified into a thin layer, which accumulated in the past two months to form an insulating layer, covering the entire surface of the electrode, resulting in abnormal operation and eventually failing to work.


The other is the electrolytic cutting process test device, using electromagnetic flow meters to control the flow of saturated saline, the gap after using a period of time found that the flow signal gradually weakened, after 2 months the signal is zero. The reason is that iron oxide deposits the wall of the pipe during the electrolytic cutting process and causes a short circuit. Clear stratification immediately returns to normal.


Second, the electromagnetic flowmeter maintenance regularly check the sensor electrical performance


First, the inter-electrode resistance was roughly measured. Disconnect the signal between the sensor and the transducer. The sensor is filled with liquid. Use a multimeter to measure the resistance of the two electrodes and the ground. Is it within the specified range of the manufacturer and the measured values ​​are approximately the same. Record the resistance value measured for the first time. This value is useful for determining the cause of the sensor failure later, such as whether the deposited layer is conductive or insulating.


Next, the sensor is vented to the liquid, the inner wall is wiped clean, and the resistance between the two electrodes and the grounding terminal is measured with a megohmmeter after it is completely dry.


Finally, check the insulation resistance of the excitation coil, remove the sensor excitation coil, connect the terminal to the converter, and measure the insulation resistance of the coil with a megohmmeter.
This article is provided by Jiangsu Detu Instrument Co., Ltd., please indicate the source! !


Exterior Door Handle For Infiniti

Exterior Door Handle for Infiniti

Exterior car door handles lets you access your car`s cabin. without them, doors are hard to open. Exterior door handles come in various shapes and styles but the operation is generally the same; pulling the lever out releases the hook from the vehicle frame`s latch.

Here are some types of OE replacement exterior car door handles: pull up, pull out, and trigger.
There are two main materials used in manufacturing exterior door handles-plastic and metal.
Both materials come with different finishes, such as smooth black, textured, chrome and primed. Textured handles offer better grip even when wet, while smooth black and chrome blends with the color of your car. Primed handles are ready-to-paint pieces, which are perfect if you want to match your vehicle`s unique color.
These application-specific parts are made to look like and seemlessly replace exterior door handles, reinforcement brackets, and more.
- Stock Appearance: these replacement exterior door handles were specifically designed to look and function the same as the original handle on particular vehicles, and to match the original dimensions and specifications
- Great Value: OE quality at a lower price.

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