1. What kind of pressure should the transmitter measure?
First determine the maximum value of the measured pressure in the system. In general, you need to select a transmitter with a pressure range that is about 1.5 times larger than the maximum. This is mainly in many systems, especially in water pressure measurement and processing, with peak and continuous irregular up and down fluctuations, which can damage the pressure sensor, continuous high pressure value or slightly beyond the transmitter. Calibrating the maximum value will shorten the life of the sensor, however, this will result in reduced accuracy. Thus, a buffer can be used to reduce the pressure glitch, but this will reduce the response speed of the sensor. Therefore, when selecting a transmitter, it is necessary to fully consider the pressure range, accuracy and stability.
2. What kind of pressure medium
Viscous liquids and muds can block the pressure interface. Solvents or corrosive substances will not damage the material that is directly in contact with these media. These factors will determine whether to choose a direct barrier and a material that is in direct contact with the media.
3. How much accuracy does the transmitter need?
Determine the accuracy, nonlinearity, hysteresis, non-repetition, temperature, zero offset scale, temperature effects. But mainly by nonlinearity, hysteresis, non-repetition, the higher the accuracy, the higher the price.
4, the temperature range of the transmitter
Usually one transmitter will calibrate two temperature ranges, the temperature range for normal operation and the temperature compensateable range.
The normal operating temperature range refers to the temperature range when the transmitter is not damaged during operation. When the temperature is outside the range, the performance index of the application may not be achieved.
The temperature compensation range is a typical range that is smaller than the operating temperature range. Working within this range, the transmitter will definitely achieve its performance specifications. Temperature changes affect its output in two ways, one is zero drift; the other is affecting full-scale output. For example: +/-X%/°C of full scale, +/-X%/°C of reading, +/-X% of full scale over temperature range, +/-X% of reading within temperature compensation range If there are no such parameters, it will lead to uncertainty in use. The change in the output of the transmitter is caused by a change in pressure or by a change in temperature. Temperature effects are the most complex part of understanding how to use the transmitter.
5. What kind of output signal is needed?
mV, V,
mA and frequency output digital output, the choice of output depends on a variety of factors, including the distance between the transmitter and the system controller or display, whether there is "noise" or other electronic interference signals. Whether the amplifier, the position of the amplifier, etc. are required. For many OEM devices with short distances between transmitter and controller, the most economical and effective solution for transmitters with mA output
If you need to amplify the output signal, it is best to use a transmitter with built-in amplification. For long-distance transmission or strong electrical interference signals, it is best to use mA output or frequency output.
In environments where RFI or EMI specifications are high, in addition to the need to select mA or frequency output, special protection or filters are also considered.
6. What kind of excitation voltage is selected?
The type of output signal determines how the excitation voltage is selected. Many amplifiers have built-in voltage regulators, so their supply voltage range is large. Some transmitters are quantitatively configured and require a stable operating voltage. Therefore, a working voltage that can be obtained determines whether or not to use a sensor with a regulator. When selecting a transmitter, it is necessary to consider the operating voltage and system cost.
7. Do you need an interchangeable transmitter?
Determine if the required transmitter can accommodate multiple operating systems. Generally speaking, this is very important. Especially for OEM products. Once the product is delivered to the customer, the cost of the customer's calibration is considerable. If the product has good interchangeability, then even if the transmitter used is changed, it will not affect the effect of the whole system.
8. The transmitter needs to maintain stability after working overtime:
Most transmitters will “drift†after a timeout, so it is important to understand the stability of the transmitter before purchasing. This pre-work can reduce the hassle of future use.
9, the package of the transmitter
The package of the transmitter, especially often overlooked, is its frame, however this will gradually reveal its shortcomings in later use. In the purchase of the transmitter must take into account the future working environment of the transmitter, how the humidity, how to install the transmitter, there will be strong impact or vibration.
10. What kind of connection is used between the transmitter and other electronic devices:
Do you need a short distance connection? If a long-distance connection is used, is it necessary to use a connector?
·Basic precautions
Do not put expensive oil into low-quality cartridges to avoid wastage. Most pre-filled oil cartridges have the so-called 510 thread. The oil cartridge screws onto a rechargeable battery. Some of these batteries have buttons and some heat up automatically when you pump the oil. Some batteries have multiple temperature settings and some heat up to a preset temperature; these features need to be known in advance.
·Cleaning notes
Use a suitable cleaning tool to clean them, such as activated charcoal or dried tea leaves in a used pipe to absorb the oil. It is important not to use alcohol or other boiling water to clean the pipe, and to wait until it has cooled down completely before cleaning. Otherwise, the hot stem will come into contact with the watery liquid and cause the mouthpiece tenon to loosen, thus shortening the life of the 510 cartridges.
This is what you should be aware of when using 510 cartridges. At the same time, when using 510 cartridges, there are still some vaping tips, for example, when using them, be careful not to suck too hard, will not produce smoke. When you inhale too hard, the smoke is sucked directly into your mouth and not atomized by the atomizer, so gently inhaling is more powerful and gives you a better vaping experience.
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