MLT28 - High-End Mechanical Load Tester
The MLT28 is our premium mechanical load tester, designed for testing both according to and beyond the requirements of the IEC standards. Equipped with 28 pneumatic cylinders, each featuring four suction cups, it provides outstanding accuracy, flexibility, and repeatability for advanced module testing.
A key feature of the MLT28 is its ability to perform inhomogeneous load tests. The system divides the module into eight independently controlled load zones, allowing each section to be loaded individually. This enables the simulation of realistic mechanical load scenarios, such as those occurring in solar tracking systems or under uneven environmental conditions.
The MLT28 features a robust, high-rigidity frame that ensures exceptional long-term stability and highly precise test results. A wide range of optional features is available to further enhance testing capabilities, including:
- Deflection measurement using distance sensors
- Electrical continuity monitoring during testing
- Safety enclosure for enhanced operator protection
- Calibration equipment for verification of load accuracy
Whether for standard qualification tests or advanced R&D applications, the MLT28 delivers the performance and flexibility required by leading PV manufacturers and test laboratories.
Technical specifications
| Test area | 2.25 m × 1.5 m |
|---|---|
| Simultaneous testing capacity | 1 |
| Number of pneumatic cylinders | 24 |
| Number of suction cups at one cylinder | 4 |
| Maximum total exertable force with all cylinders |
Push +27,720 N Pull -22,000 N |
| Corresponding maximum pressure load (on 2 m²) |
Push +13,860 Pa Pull -11,000 Pa |
| Load cycle frequency | 0.1 Hz (optional 0.5 Hz) |
| Number of deflection sensors | 1 (optional 8) |
| Relevant standards | IEC 61215, IEC 61646, IEC 62782, UL 1703, ISO 9806, EN 12975 |
Key facts
- Reduced local mechanical stress on test unit through a high number of 96 suction cups
- Fast and precise configuration of the cylinder array with mechanical coupling of the cylinders
- Fast adjustment for testing units of different sizes with sliding cross bars and quick release levers
- Static and dynamic load testing according to common international standards
- Testing to failure through applicable forces up to +27 kN / -22 kN
- Highly accurate deflection-measurement of the unit under test by optical distance sensors.
- Electrical continuity measurement for PV modules available
- Continuous monitoring of load uniformity with one dedicated load cell per cylinder
- 28 pneumatic cylinders with 112 suction cups for optimized and highly uniform load distribution
- Independent load control for each bridge and cylinder, enabling highly flexible test configurations
- High-end mechanical load testing for qualification according to and beyond international standard
Other Mechanical Load Testers
Software features
- Intuitive graphical user interface for full remote control of the test stand
- Dynamic testing according to IEC 62782
- Customized test schedules (even non-cyclic, free definition of various load setpoints, can be saved and restored)
- Real-time visualization of key measurements in graphical displays
- Quick and easy test scheduling – through displaying of required testing times.
- Web-based user interface – intuitive operation from any network-connected device
- Automatic calculation of the optimum cylinder positions for fast and reliable test setup
- Central database storage of all test parameters and results
- Real-time visualization of live test data as well as comprehensive analysis of completed tests
- Dynamic load testing with programmable load profiles, multiple load steps, cycle counts, and cycle times
- Intuitive programming of inhomogeneous load distributions for realistic simulation of application-specific load scenarios
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