Reliant's model CERHV - very high resolution extensometer calibrator is a precise instrument designed for ease of use and long-lasting durability. Designed to meet the calibration requirements for ASTM E83 for 0.250" gauge length and greater extensometers as well as ISO 9513 Class 0,5 over the full measuring range of the calibrator, it features 10 nanometer resolution over a 50 mm (2.000") measuring range.

Unlike competing units, our model CERHV is compact, has a low center of gravity, and its hand-wheel is conveniently and ergonomically located at table top or desk level. This innovative design has a high resolution digital encoder located near the axis of the central lead screw and its movable table is held in a stiff, compact frame by a crossed-roller rail system.

It also has an easy to use, USB powered, stand-alone display. The display's units and resolution can be easily changed with a push of a button and it can be powered by a USB/AC adapter or any computer USB port.

The calibrator allows for easy and accurate extensometer attachment. Long gauge length extensometers can be easily attached without the need for additional extensions to the calibrator's frame. The upper mounting post adapter is designed to allow easy axial alignment while the lower mount allows easy radial / concentric alignment. Adapters are available for flat or round specimens as well as for COD gauges and transverse extensometers.

Model CERHV was designed from the ground up to allow easy conversion to a fully automated calibration system. Its manual hand wheel can be replaced with an optional stepper motor with a built-in drive and controller and pre-wired limit switches for safe, motorized operation. The calibrator can be commanded to move and its position read through one RS232 connection. Sample programs using VBA in Microsoft Excel are provided to allow you to easily create your own automated process.

• Full 50 mm (2.000") measuring range and 10 nanometer (0.394 micro-inch) resolution.
• Stand alone digital display with tactile switches for tare, units, sign, and resolution.
• Adapters available for nearly any extensometer.
• Each model CERHV is calibrated with a laser interferometer by an A2LA accredited calibration lab.
• Optional motorized version for automated calibration.

• Adapters available for nearly any extensometer.
• Optional motorized version for automated calibration.

Measuring Range: 50 mm (2.000").

Accuracy: ±0.19 µm (±7.5 µm) over any 0.12 mm (0.00475") range.

Resolution: 10 nm (0.4 µm).