VACUUM EXTENSOMETER
PMA-13
Vacuum Extensometer PMA-13
High-precision vacuum high-temperature extensometer up to 3000°C in versions with motorized and manual drive.
General information
- The system also requires a TF amplifier (modulator, demodulator, signal amplifier). This is not included in the scope of delivery.
Notes
- Inert gas operation can cause turbulence (warming gas inside the chamber). This turbulence can cause undesirable vibrations in the probe fingers, which can lead to interfering superimpositions on the measurement signal.
- The extensometer adjustment flange is required for mounting the HT vacuum extensometer to the chamber.
- To protect the device from manual damage when replacing the ceramic stylus fingers, the extensometer installation guide is required.
Characteristics
- New version 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.
Accessories
- Extensometer stand for proper temporary mounting of the device outside the testing machine.
- With motorized control: Insertion of the start-up control of the probe fingers via the internal sample positioning mechanism.
| 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 | 6-50 mm, continuously adjustable by the customer | 6 – 50 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. 10 kg | Approx. 11 kg |
| Measuring system | |
|---|---|
| Measuring principle | Inductive Transformer (LVDT) |
| Measuring range (linear) | ± 10 mm, linear range |
| Resolution | < 0,1 μm |
| Supply voltage | 5 V |
| Carrier frequency | 10 kHz into 1 kΩ |
| Signal output | 37,5 mV/V/mm |
| 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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