Extension gauge calibrator calibrator calibration device

JW-YSJ type extensometer calibrator extensometer calibrator extensometer calibration device

It is a pure mechanical high-precision displacement micrometer instrument. According to the requirements of JJG762-2007 extensometer calibration regulations, it is specifically used for the calibration of various extensometers, and is also widely used for the calibration of displacement sensors and corresponding dial gauges and micrometers.

This instrumentExtension gauge calibrator calibrator calibration deviceComposed of precision differential probes and measuring brackets. The calibration device is designed with a modular structure. Precision differentiation

The measuring head and support arm can be combined in various ways or positions to facilitate the metrological calibration of various specifications and models of extensometers. Users can also configure specialized accessories for precise micro deformation measurement according to their specific testing needs.

The precision differential measuring head consists of a sliding measuring rod, a measuring rod sleeve, a reading inner cylinder, a reading outer cylinder, and a high-precision threaded pair.

Its large range is 25mm; Minimum division (cursor division) 0.0002mm; Rotate the outer cylinder with a division of 0.002mm.

The displacement change reading is:

L=（a+0.001b+0.0001c）-(a0+0.001b0+0.001c0)

Among them: a0, b0, c0 are the readings before the corresponding displacement changes

A - Reading of millimeter markings on the inner cylinder

B - Reading of engraved lines on the outer cylinder

C - cursor marking reading

1. Measuring the gauge length range Lmax of the extensometer200㎜

2. Measure the installation aperture of the support arm on the support bracketφ10； φ28

3. Differential probe reading inner cylinder axial scale0.5mm/grid

4. Differential probe reading inner cylinder vernier scale0.0002mm/grid

5. Differential probe reading outer cylinder circumference scale0.002mm/grid

6. Precision index of high-precision differential probe

Extension gauge calibrator calibrator calibration deviceCalibration instrument indication error:

Range within 0.5mm ≤ 0.5 μ m error

Range above 0.5mm ≤ 0.10% Point by point relative error

Reference standard:

JJF 1096 - 2002Calibration specification for extensometer calibrator

ISO9513:1999Calibration of extensometers for uniaxial testing of metallic materials

JJG762-1992Verification regulations for extensometers

Can calibrate a 0.5-level extensometer