Basic Info.
After-sales Service
Free After-Sales Service Support
Application
Chemical Instrument, Mechanical Instrument, Electromagnetic Instrument
LCD Display
With LCD Display
Customized
Non-Customized
Flow Range
0.06cbm/H~15000cbm/H
Test Method
Negative Pressure Method
Transport Package
Standard Export Package
Product Description
Advanced Gas Flow Test Device Incorporating Sonic Nozzle TechnologyBasic Inf.| Type | Gas Flow Device | Warranty | 1 Year |
| Caliber | DN15-DN300 | After-sale Service | Free after-sale Service Support |
| Expanded uncertainty | 0.25%,0.3%(k=2) | Flow stability | <0.1% |
| Communication method | 485 communication | Power supply | AC3×380V±10%,50Hz |
| Test qty for one time | 1pcs | Test meter type | Gas turbine, waist wheel flowmeter, vortex flowmeter, ultrasonic flowmeter, mass flowmeter and other gas flowmeter |
| Testing method | Negative pressure method
(Vacuum Pump) | Workbench material | Stainless steel 304 |
| Voltage Output | 380V/220V | Ambient temperature | 0~50ºC |
| Atmosphere pressure | 86~106kPa | Relative humidity | 40%~80% |
| Production Capacity | 800 pieces/year | Transport package | Standard Export Package |
| Trademark | TNMA | Origin | China |
2.All stainless steel pipe,long service time can be achieved.
3.the critical flow venturi nozzle, is designed and manufactured by our company based on the standard of ISO 9300:2005 "Measuring gas flow with critical flow venturi nozzle", and has been verified/calibrated by the national legal metrology agency.
4 The device can be used to detect various calibers and various forms of gas flow meters. Working principal
The device uses a venturi sonic nozzle as a standard device. The venturi sonic nozzle has the following advantages:simple
structure, stable performance, high accuracy,no moving parts,convenient maintenance,long verification period(five years),etc
During operation, the gas flow throughout the entire experimental pipeline is achieved through the suction of a vacuum pump. The air passes through a filter, left and right meter switching system, enters the meter under test, then enters the buffer container through the sonic nozzle and control valve, and finally is exhausted into the atmosphere via an oil-free vacuum pump. When the gas passing through the sonic nozzle reaches the critical state, the mass flow rate through the meter under test and the nozzle remains constant. Therefore, the flow rate through the sonic nozzle is determined for a duration of time, while the system receives signals from the gas meter sampling, temperature sensor, pressure sensor, and humidity sensor. Automatic corrections are made to account for temperature, pressure, and humidity factors, providing the measurement error of the gas meter under test.
Feature of this device
- The proposed power system utilizes a combination of large and small vacuum pump sets as the power source, paired with a frequency converter for automatic regulation. This combination ensures that nozzles with different flow rates have sufficient back pressure ratios, effectively saving energy and reducing noise pollution.
- The surge tanks are designed in a combination of large and small sizes. The small tank is equipped with nozzles below 8m³/h, while the
- large tank is configured for nozzles above 8m³/h. Each surge tank is equipped with temperature and pressure sensors, connected to dedicated detection pipelines. This setup improves the accuracy of small flow rate measurements.
- Each detection pipeline is equipped with an analog signal reception module, which converts the signals to digital format and transmits them to the upper computer via a 485 interface. Compared to traditional long-distance transmission of analog signals, this method enhances signal anti-interference capability and system accuracy.
- The system can receive various signals such as current, voltage, and pulses in real-time. It can also employ dynamic image processors or optoelectronic samplers to achieve dynamic metering by automatically sampling the meters under test.
- Every detection pipeline is equipped with a touch-sensitive LCD display, enabling the start of the testing program through touch operation after the meter under test is installed. This saves labor for the testing personnel and improves efficiency.
- The computer software utilizes methods such as piecewise linear interpolation, parabolic interpolation, and input of calibration points to perform error correction on all temperature, pressure, and humidity transmitters. This ensures a more accurate and reliable system.
- Standard devices employed in this system use Venturi nozzles. The computer automatically selects the optimal nozzle combination based on the flow rate of the meter under test.
- For automatic control, a single-chip microcomputer and high-precision A/D converter technology are utilized. They automatically detect parameters such as pressure, temperature, and humidity, participating in real-time error correction calculations to ensure the accuracy of the device.
- The meter number can be input using a Symbol laser barcode scanner, which automatically scans and inputs the factory serial number of the gas meter (keyboard input is also possible).
- The computer control software enables full automation of the entire system during testing. The testing software features a clear and aesthetically pleasing interface, user-friendly operation, and the ability to dynamically connect with Excel software for easy and rapid completion of test reports. It also includes functions for data storage, certificate printing, analysis, and statistics.
- All pneumatic components are sourced from Taiwanese brands like Yadeke and Japanese brand SMC. The sensors used are from internationally renowned brands.
Standards
1.
JJF1204-2010 "Critical Flow Venturi Nozzle Method Gas Flow Standard Device Calibration Specification"
2.JJG 643-2003 "Standard Meter Method Flow Standard Device Verification Regulation"
3.JJG620-2008 "Critical Flow Venturi Nozzle Verification Regulation"
4. JJG633- 2005 "Gas Positive Displacement Flowmeter Verification Regulations"
5.JJG1030-2007 "Ultrasonic Flowmeter Verification Regulations"
6.JJG1029-2007 "Vortex Flowmeter Verification Regulations"
7. JJG1037-2008 "Turbine Flowmeter Verification Regulations"Certificates Honors of TNMA Software Copyright Utility Models Patent Certificates
Our Clients
Non-Standard Customized Products 1000L Piston Type Gas Flow Standard Device
Standard Meter Method Gas Flow Standard Device
Gas Meter Temperature Adaptability
Detection Device and Other Gas Meter
Type Evaluation Test Equipment
Why Choose TNMA1. Strong R&D AbilityAs a professional manufacturer of metering calibration equipment for gas meters, water meters and various flow meters, our company has a group of technicians who are professionally engaged in the research of flow measurement technology. They have long been committed to the field of flow measurement and control. And the scientific research institute has a good cooperative relationship to ensure the leading position of the company's products in this industry.2.Strict Quality Management System Our company implement rigorous quality control processes to ensure that all products or services meet set standards. This results in high-quality deliverables and satisfied customers.
All the ready products will be tested before shipment and will provide test report.3.Accurate Delivery TimeWe have stable stock to avoid any delay of shipment.We are always put customers' requirements at the first place. We try our best to avoid any inconvenience for our customers.
With advanced technology and streamlined processes, we can provide fast and efficient calibration services for you.
4.Customer Service and Support: As a professional manufacturer, we provide comprehensive customer service and support, helping customers to troubleshoot issues, access technical assistance, and receive training on how to use your equipment effectively.
5.Innovation and Leadership: Finally, as a leading manufacturer in this field, we are constantly innovating and improving your equipment, whether through new technology or by partnering with other industry leaders. This helps to ensure that our customers have access to the latest and most effective calibration solutions, keeping them ahead of the curve in utility measurement.
Address:
65 Kaiyuan Street, Qingshanhu Science and Technology City, Lin′an District, Hangzhou, Zhejiang, China
Business Type:
Manufacturer/Factory
Business Range:
Industrial Equipment & Components, Instruments & Meters
Company Introduction:
Our company specializes in producing high-quality water meter and gas meter testing equipment. With over 20 years of experience in the industry, we have established ourselves as a trusted and reliable provider of these essential products. Our team of experts has a wealth of knowledge and experience in producing accurate, reliable, and durable testing equipment. We are committed to providing the best quality products and services to our customers, ensuring maximum satisfaction and long-term success. At our company, we understand the importance of accurate measurement and testing in the water and gas industries. Our equipment is designed to meet the most rigorous standards and specifications, ensuring that our customers can rely on us to provide the best possible results. Whether you are looking for equipment to test residential water and gas meters or commercial-sized equipment, we have the expertise and capabilities to meet your needs. Our commitment to quality, reliability, and customer satisfaction is unmatched in the industry, and we look forward to establish cooperation relationship with you.
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