Gas Turbine Flowmeter RS485 Communication

parameter

1. Instrument caliber and connection method: 25.40.50.65.80.100.125.150.200.250.300 adopts flange connection
2. Range ratio: 1:10 1:20 1:30
3. Instrument material: Meter body: 304 stainless steel
4. Protection level: ip65

Gas turbine flow meters are mainly used to measure the flow of air, nitrogen, oxygen, hydrogen, biogas, natural gas, steam and other medium fluids in industrial pipelines. When measuring the volume flow under working conditions, it is almost independent of fluid density, pressure, temperature, viscosity and other parameters. Impact. There are no moving mechanical parts, so it has high reliability and low maintenance. Instrument parameters can be stable for a long time. The gas vortex flowmeter uses a piezoelectric stress sensor, which is highly reliable and can work in the operating temperature range of -20°C to +250°C. It has analog standard signals and digital pulse signal output, which is easy to use with digital systems such as computers. It is a relatively advanced and ideal flow meter.
  
Description

The temperature and pressure compensated gas turbine flowmeter integrates a gas turbine flow sensor and a flow totalizer. Its main performance indicators are up to And the ideal instrument for gas trade measurement.

working principle
When the airflow enters the flow meter, it first passes through the rectifier with a special structure and is accelerated. Under the action of the fluid, the turbine overcomes the resistance torque and friction torque and starts to rotate. When the torque reaches balance, the rotational speed is stable. The rotational speed of the turbine is proportional to the gas flow, and the magnetic field is periodically changed by the magnet on the rotating transmitter disk, so that the pulse generator outputs a pulse signal with a frequency proportional to the flow rate. The microprocessor in the converter counts and calculates the pulse signal to obtain the working condition flow rate. At the same time, it detects the temperature and pressure of the medium, converts the working condition volume flow rate into the standard volume flow rate according to the volume correction model, and accumulates it to obtain the standard volume total amount. .

Calculation formula
For example: DN40 caliber gas turbine flowmeter, flow range 5-50m3/h, F-1 is set to 0 (instantaneous quantity displays mh, cumulative quantity displays m3), F-8 is set to 0.001, F-9 is set to 250ms, this This means that for every accumulated flow of 0.001 m, an equivalent pulse with a pulse width of 250ms and a duty cycle of 50% will be output, that is, the upper limit frequency is 1000/ (250*2)=2Hz, and the corresponding upper limit of flow is 0.001 * 2*3600-7.2 m3/h, when the instantaneous flow rate is greater than 7.2 m3/h, the frequency of the output equivalent pulse is still 2Hz, that is, the output is saturated.

Instrument coefficient compensation, that is, multi-point polyline correction of the instrument coefficient K (see P16), a total of 1 can be set to 6, (F, K) (i=1, 2,..., 6)

(1) F, is the original frequency, proportional to the flow rate, unit Hz;

К is the dimensionless relationship between the t coefficient at the E frequency point and the instrument coefficient K (P9 parameter), where K is the actual coefficient at the F frequency point, generally obtained by real flow calibration.

(2) Working principle of multi-point polyline correction. The frequency corresponding to the current flow rate Q is F:

F. >F, (i=12...18), according to the specific parameters built into the table, F is the frequency of the last correction point.

 
Specification

illustration

1The upper limit pressure loss is the pressure loss when the flow meter works at the upper limit flow point, the medium is air, and the temperature is normal.

2DN20, DN32, DN65, and DN125 are non-national standard products and need to be customized.

Installation location and requirements
1. It is strictly prohibited to weld the pipe flange online with the flow meter. The flow meter should be removed before welding. Before installing the flow meter, the debris, welding slag, and dust in the pipeline should be cleaned.

2. In order to facilitate maintenance and not affect the normal transportation of fluid, it is recommended to set up a bypass pipeline as shown in the figure above.

3. In order to prevent impurities from entering the flow meter, a filter must be installed.

4. The flow meter should be installed horizontally. It is recommended to install a steel expansion joint (compensator) on the back side of the straight pipe section after the flow meter. The expansion joint must meet the nominal diameter and nominal pressure requirements of the pipeline design. The expansion joint is used to compensate for pipeline stress and facilitate the installation and disassembly of the flow meter.

5. If vertical installation is required, please indicate this when ordering, and the product must be configured accordingly. When installed and used, the air flow direction should be from top to bottom.

6. When the flow meter is installed for outdoor use, it is recommended to add a protective cover to prevent rainwater immersion or hot sun exposure, which will affect the service life of the flow meter.

7. There should be no strong external magnetic field interference or strong mechanical vibration around the flow meter.

8. The flow meter needs to be reliably grounded, but it must not be shared with the ground wire of the strong current system.

Application scenarios

Packing & Delivery


FAQ
1. Q: What information need to be provided to choose the suitable model?
A: Application field, Nominal pressure ,Medium & medium temperture , Power supply , Output,
Flow range, Accuracy, Connection and other parameters.
2. Q: Are you a trade company or a manufacturer?
A: We are an ISO approved manufacturer specialized in level and flow measuring instruments.
OEM & ODM service are available. Welcome to visit us in China.
3. Q: What is your MOQ?
A: To start our cooperation, sample order is acceptable.
4. Q: What is your delivery date for the Intelligent Mini Micro Turbine Fuel Oil Diesel Flow Meter?
A: The delivery date is about 3-15 working days after receipt of payment.
5. Q: What is your payment terms?
A: We support T/T, PayPal ,Western Union.
For mass production order, it is 30% deposit in advance and 70% balance before shipment.
6. Q: Do you have a warranty for the Flow Meter?
A: Yes, we have the warranty of 12 months.