DYNAMIC VACUUM EXTENSOMETER
PMA-52
Dynamic Vacuum Extensometer PMA-52
High-precision vacuum high-temperature extensometer up to 3000°C.
General information
- The system is supplied without a cable for the encoder signal.
- The system also requires a TF amplifier (modulator, demodulator, signal amplifier). This is not included in the scope of delivery.
Notes
- During inert gas operation, turbulence can occur (heating gas inside the chamber). These turbulences can cause unwanted vibrations in the probe fingers, leading to disruptive interference with the measurement signal.
- The extensometer adjustment flange (PMA-13/3) is required to attach the HT vacuum extensometer to the chamber.
- The extensometer installation guide (PMA-13/4) is required to protect the device from manual damage when replacing the ceramic probe fingers.
Characteristics
- Version V8 with higher sensitivity/reduced nonlinearity
- Simple operation due to fixed suspension on the flange of the vacuum chamber and the feed wheel for the probe fingers.
- Quick test readiness.
- Uncomplicated positioning of the probe fingers.
- Adjustable initial measuring length L0 and simple sample attachment mechanism with approach indicator “probe finger sits well on sample”.
- Cuff rings for adjusting the measuring length L0 not required on the tensile test specimen.
| Scanning mechanism | Manual operation | Motor operation |
|---|---|---|
| Probe finger pressure force | 0-3 N (300g) adjustable, horizontal | 0-3 N (300g) adjustable, horizontal |
| Probe finger material | Al2O3, others optional | Al2O3, others optional |
| Probe finger position | Perpendicular to the sample longitudinal axis | Perpendicular to the sample longitudinal axis |
| Measuring length L0 | 6-20 mm, continuously adjustable by the customer | 6 – 20 mm, continuously adjustable by the customer |
| Permissible test vibration | max. 0,5 Hz (amplitude-dependent) | max. 0,5 Hz (amplitude-dependent) |
| Housing | Aluminum, anodized, stainless steel | Aluminum, anodized, stainless steel |
| Weight | Approx. 7 kg |
| Measuring system | |
|---|---|
| Measuring principle | Strain gauge full bridge |
| Measuring range (linear) | ± 1,25 mm, linear range |
| Resolution | < = 0,1 μm |
| Supply voltage | 1 10-V |
| Carrier frequency | 350 kHz into 1 kΩ |
| Signal output | 1,6 mV/V/mm +/- 2,5% |
| max. nonlinearity | 0,1% of the full measuring range |
| Permissible measuring system Temperature | Max. 80 ° C |
Thanks to our many years of industry experience, we understand your specific requirements down to the last detail.
In modern testing technology, high-temperature and vacuum furnaces are indispensable: they simulate exact extreme conditions for demanding material tests.
They thus form the foundation for development, quality assurance and research in key industries such as aerospace, automotive, electronics and high-performance materials technology.
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