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- Model 3925-0160 - Flow Tester
Model 3925-0160 -Flow Tester
The flow meter operates on the thermodynamic principle. The instrument uses the linear relationship between the flow rate and the energy carried along. At a thin stainless steel pipe two thermal resistance elements are mounted. A part of the air or gas flow passes through this bypass and is heated with constant power by two heating elements. Due to thermal transfer the two temperatures drift apart. The difference between the two temperatures is directly proportional to the air mass flow.
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In the industry flow test is used quite often. Pipe structures (like exhaust systems), valves, fittings or many other parts can be checked with a flow tester.
Measuring the mass flow directly is very precise. In addition a wide choice of measuring ranges is available and the wide measuring span (1:50) makes our flow tester applicable for most diverse applications.
Different methods can be used to determine the mass flow. Our flow tester 3925-0160 uses a thermal mass flow meter. Contrary to the volumetric flow meters no additional sensors for temperature and pressure are needed. So the installation of our flow tester is higly simple and makes the quality check of your products as easy as possible.
Automation of the workplace nowadays have to be realized even in quality assurance. To test production parts for flow, it is therefore necessary to integrate the flow test in the manufacturing process.
Important features of the FLOW TESTER 3925-0160 are:
Important features of the FLOW TESTER 3925-0160 are:
- automatic control cycle
- storage of test programs
- contamination free test
- reproducible measuring results
- short cycle times with high accuracy
- unambiguous results
- measured value in ml/min etc.
- programmable test pressures and test times to suit to the production of many different components
- user friendly operation with interactive user guidance
- modular design concept for ease of maintenance and service
A high-precision thermal mass flow meter with high sensitivity is used as measuring sensor. This unit consists of a measuring tube and an exchangeable bypass which determines the measuring range.
The design of the measuring tube and the bypass ensures a laminar flow inside.
A heating coil is located in the middle of the measuring pipe. Temperature sensors are placed in equidistance on both sides of the heating. Without a gas flow both sensors register the same temperature. Any gas flow leads to a temperature difference between the sensors which is directly proportional to the mass flow on the inside of the pipe.
Programming of the control and test parameters is menu guided - no special knowledge is required. The test parameters are stored in the program register and can be recalled as required. Different selectable languages are available.
A write-protect key switch ensures data security. Data can be read but not modified by the operator.
Machine control systems are able to communicate with the leak tester via the standard parallel (discrete I/O) interface or various other optional interfaces.
A serial interface is available to connect the leak tester with a computer or printer. Other optional protocols are available (see technical data).