After all the Aister flowmeters are delivered, all products enjoy the "three guarantees" service.

1. One year warranty, lifelong maintenance.

2. During the warranty period, if the product is damaged due to improper use by the user, our company will be responsible for overhauling the product and will only charge the cost of the corresponding damaged parts.

3. outside the warranty period, the product can not work properly, our company is responsible for overhauling, only charge the cost of the corresponding damaged parts.

After finishing the pre-sale and after-sale service, many purchasing managers have to say, we spend money to buy the product, how can it be intentionally damaged? Indeed, customers will not intentionally damage the product, product damage is often due to the existence of many people on the flow meter knowledge of the blind spot caused by.

Next, we will talk about the common problems and solutions of gas turbine flowmeter, in order to help Aister's new and old customers to correctly use the gas turbine flowmeter.

1, In the gas turbine flow meter instrumentation installation, connection process, should ensure the accuracy of each link, including the installation of the site before the inspection, the installation process of gas turbine flow meter instrumentation wiring, system grounding and so on, so as to ensure that the detection of real data and can be accurately output.

2, For the operation of the measurement system can be used "dual-track measurement, comparison and confirmation" method, as well as the "alternative method" for the operation of the measurement of gas turbine flowmeter instrumentation failure confirmation and elimination.

3, Regular gas turbine flowmeter instrumentation for overall cleaning, if necessary, gas turbine flowmeter instrumentation sensing head part of the blowing, to avoid impurities in the sensing head of the condensation. In the cold season in the measurement of straight pipe section and gas turbine flowmeter instrumentation part of the accompanying heat device can also reduce impurities in the measurement of gas turbine flowmeter instrumentation at the condensation.

4, Regular drainage of the pipeline, especially before the straight section of water, according to the specific circumstances of setting up a person regularly discharged, as far as possible to reduce the measurement of water in the section, as far as possible to exclude the pulsation of the fluid.

5, To strengthen the management of the measurement system data, set up a regular print function, based on the print data combined with the condition of the gas turbine flowmeter instrumentation operation analysis.

The gas and liquid flow meters of Aister Instruments have various output methods. Purchasing managers are more interested in these three outputs: pulse output, 4-20mA current signal output and RS485 communication output. Generally speaking, pulse output is one kind of output that comes with the flowmeter from the factory, no matter whether the customer has mentioned it or not. Other outputs, purchasing managers can be based on the actual working conditions, and Aister Instrumentation's sales manager to explain the need for which outputs, can be customized for you to configure.

So what is the difference between these three types of outputs? Here is a brief explanation.

1. What is pulse output?

Pulse output refers to the output of metering parameters. Pulse output provides the basic parameters for meter calibration and remote meter reading. Pulses are represented in some flow meter displays as flashes of an indicator light, one flash is a pulse. The pulse signal is a digital signal.

2. What is 4-20mA current signal output?

The transmission distance is usually about 100 meters, and it can be connected to the computer and can read out the value on the computer. It is an analog signal output.

3. what is RS485 communication output?

It has the function of long-distance transmission, and the transmission distance can be up to 1200 meters, which is a wired transmission. It is digital packet transmission.

High-purity gas flow measurement in the instrument selection, high-purity gas has a stable component, no dust, no water droplets, no oil characteristics, for flow measurement and flowmeter stable operation to create a good condition. By comparing the working principle of differential pressure flowmeter and thermal mass flowmeter and their application in the actual measurement of high purity gas, the conditions for the selection of two types of flowmeter are introduced, and the reasons for the errors of differential pressure flowmeter and thermal mass flowmeter in the actual measurement are analyzed and the corresponding solutions are given.
High-purity gases in all walks of life and industrial production have a wide range of uses, it is usually produced by the air separation process, gaseous high-purity gases through the pipeline or the cylinder set of grid delivery to the user, the liquid product is transported to the user with a tanker truck. In the process of pipeline transportation of high-purity gases, the trade handover measurement is usually a gas flow meter, the nominal diameter of the flow meter from 50 mm to several hundred millimeters. Most of the handover of large quantities, high settlement amount of the handover point, often the supply and demand sides each installed 1 set of flow meters, so as to achieve fair measurement, foolproof.
On the selection of high-purity gas flowmeter, due to the characteristics of the measurement object and traditional habits, most of the standard orifice plate flowmeter, the flowmeter has the following characteristics
1) high stability and reliability, anti-interference ability, maintenance and replacement is simple and convenient.
2) Wide flow measurement range.
3) Measurement accuracy to meet the needs of gas trade transactions.
4) Measurement and verification is convenient. Most of the geometric verification method for verification, simple operation and cost savings. Some suppliers (or the demand side) required after the geometric method of verification, and then use the actual flow of verification method of verification once. Practice has proved that, if a set of flowmeter are qualified in all aspects, the results of real-flow test will also be qualified.
5) The price is much cheaper than Coriolis mass flow meter.
6) Narrow range ratio is a major disadvantage of the orifice plate flowmeter, but in recent years the booming development of double-range orifice plate flowmeter, can be expanded to 33 times the range ratio, but also to achieve 1.0% uncertainty, thus making up for the shortcomings.

The purity of high-purity gases is extremely high, the change of components is completely negligible, therefore, the density of the gas in addition to the temperature, pressure and compression coefficient, no other factors. And because of the high purity of the gas without dust, no water droplets, no oil, for the accurate measurement of high purity gas flow has created superior conditions.
Differential pressure flowmeter to measure the flow of steam, the gas phase must be converted to the differential pressure signal of condensate. The conversion, if not properly handled, will introduce a slight measurement error. In addition, when the steam into the saturated state, due to the presence of two-phase flow in the pipeline, will also increase the measurement error, of course, two-phase flow on the vortex flowmeter has a greater impact. When the measured fluid is a high-purity gas, because the fluid is dry, there is no two-phase flow and gas phase to liquid phase problems, so, to achieve the required accuracy is more guaranteed.

Diesel or other oil medium with what flow meter is better to measure? For diesel whose viscosity is not very high, we recommend generally used and cost-effective vortex flowmeters and turbine flowmeters.
For some oils with relatively high viscosity, such as motor oil. So with vortex flowmeter and turbine flowmeter can be used, the answer is definitely not. In other words, the viscosity is not very high diesel, diesel with vortex flowmeter why there are so advantages, here we will analyze the characteristics of vortex flowmeter, only in its characteristics, you will find the advantages of vortex flowmeter where, but also feel the measurement of diesel we recommend the use of vortex flowmeter.
The principle of vortex flowmeter is based on the principle of Karman vortex street, in terms of structure, it is the vortex generator in the pipeline, the fluid passes through the vortex generator to generate the Karman vortex, and the instantaneous frequency of the fluid is calculated by the sensor. Vortex flowmeters are relatively cheaper than other flowmeters.