Introduction:

The proving ring is a grade 0.3(3� “force value�measuring instrument,
It is designed to calibrate material testing machine and compression testing machine.
It can also be used to test and calibrate “force value�for other apparatus, equipment and components.
It is characterized by reliable readouts, zero drift, good quality, aging-resistant, and zero worn-out.
It is inexpensive, easy to operate, accurate and safe and suitable for applications in quality monitoring, metrological testing,
scientific institutes, colleges and universities, and quality inspection

Specification:

Scope of measurement: 10% of the max testing force ~ the max test force
Repetitive error and Long-term stability of the displayed value:�.3%
Relative error of the displayed value produced between advance and return: �.5 %