Description

SF6 Gas Mixing Dynamic Distribution System MDD-SF6 is an environment-friendly equipment, featuring automatic gas mixing, instrument calibration and instrument verification functionality in one unit. The new design of double diagonal side ventilation and integrated installation technology in a closure rack are originated from and authorized by the German manufacturer. The whole unit is composed of calibration device for automatic gas mixer, workbench for instruments under test/calibration and ventilation. The independent ventilation meets the European laboratory fume hood testing standards. The MDD-SF6 has a simple and smooth frame with easy operation. It offers a pollution-free and safe environment-friendly condition for users who carry out  instrument calibration and verification in the laboratory as well as Institute of Metrology.

Features

• German originated and authorized design of closure rack
• High precision, mix 10^-8 ~ 10^-2 various concentrations of trace gases
• Multi channel selectable, i.e. random combination of trace gas and background gas
• Good stability, repeatability and high linear precision
• Parameter preset, automatic mixing and distribution, automatic calibration
• Traceability and transferability, accurate and reliable
• Fast and efficient mixing, calibration, recovery of trace gas and used gas
• Zero emission, no pollution, safe and environment-friendly
• Zero adsorption, reflecting true value of gas mixture
• Touch screen and all the subsystems through the network link
• Data storage, can also be connected with the computer
• Easy to operate, easy to maintain

SF6 Gas Mixing Dynamic Distribution System main part - SF6 Gas Mixer

Principle

Using mass flow to mix 10^-8 ~ 10^-2 various concentrations of trace gases

Functionality

Automatic mix gas: the device is a computer intelligent gas mixer, all the operating functions are completed by the touch screen of the gas mixer, input the name and concentration of the gases that need to be prepared and diluted, by pressing the touch screen a few times, 10 seconds or so a standard gas of correct concentration is ready;

Automatic calibration: according to the nature of different gases and the environment temperature under experiment, automatic correct flow volume;

Mix multiple sets of gas, or one type of gas at the same time;

Choose different background gas for various configuration (N2, SF6, Air... )

Use of gas: mixed standard gas can be used, also can be charged into the cylinder or air bag to off-site use.

SF6 Gas Mixing Dynamic Distribution System main part – Recovery device of used gas and standard gas

Auto control module, audio and visual alarm

Compressor supervision accumulated counter

Over pressure protection

Mains power module (fused)

Standard gas: concentration and equivalent as per customerized

Recover standard gas and used gas separately

Compressor discharge of standard gas recovery: 1.8m3/h

Compressor discharge of used gas recovery: 1.0m3/h

Ultimate pressure after recovery: 5.0MPa

Specification

Flow range, the number of groups, the maximum dilution ratio can be set according to user requirements

Gas distribution principle: mixed method

Flow linear error: less than ±0.3%

Detection range: the volume ratio of 10^-8 ~ 10^-2

Gas mixer traceability: traceable to national measurement standards

Limiting dilution ratio: 3000:1

Flow control mode: mass flow meter

Channel number: 4

Calibration gas: SF6 (optional N2, Air, etc.)

Gas distribution outlet flow: 200 ~ 2000mL/min (SF6)

Dilute gas channel flow: 40-2000ml/min (SF6)

Gas concentration repeatability: less than ±0.5%

Gas distribution tubing: PTFE, passivated stainless steel

Ventilation volume: 1000 m³/h

Operating voltage: 220V-240V 50Hz, AC

Operating temperature: -10 ℃ ~ 50 ℃

Ambient humidity: no more than 90%RH

Dimension: 1125mm X 700mm x 1950 mm

Instrument weight: about 130kg

Application

• The system is designed to mix SF6 gas for electrical power, it can also be used for instruments calibration, combustible gas, toxic and harmful gases in metrology, environmental protection, petrochemical, health control, CDC, coal mines and other departments of the verification of gas analyzers, and provide standard equipment for testing, calibration and testing of the equipment and the preparation of standard gas
• Mix and the preparation of standard gas for various gas measuring instruments, measuring and alarm devices and gas sensors in
the power sector
• For verification and performance evaluation of sulfur hexafluoride leak detector and the preparation of standard gas
• Methane Tester in Coal Mine, carbon monoxide, oxygen and other test equipment and performance evaluation of the standard gas preparation
• Interference test for gas analyzer and gas sensor