Relay & Meters
CMC 256 plus
The reference for accurate signal requirements
A very high-accuracy test set for protection devices and calibration applications, designed for demanding signal requirements across testing, production, and research workflows.

Product Highlights
Precision testing and calibration for demanding applications
CMC 256 plus combines very high accuracy, broad calibration support, and flexible testing capability for protection and measurement applications.
High-accuracy test set for demanding signal requirements
Excellent for protection devices of all kinds
Can also be used as a universal calibrator
Supports calibration of energy meters of class 0.2
Suitable for measuring transducers, power quality devices, and PMUs
Ideal for research and development, production, and type testing
Description
The reference for accurate signal requirements
The CMC 256plus is the first choice for applications requiring very high accuracy. This unit is not only an excellent test set for protection devices of all kinds but also a universal calibrator.
Its high precision allows the calibration of a wide range of measuring devices, including energy meters of class 0.2, measuring transducers, power quality measurement devices and phasor measurement units (PMU).
Its unique accuracy and flexibility make the CMC 256plus ideal for protection and measurement equipment manufacturers for research and development, production and type testing.
Protection testing
CMC 256plus is an excellent high-accuracy test set for protection devices, supporting demanding signal generation and testing workflows.
Calibration
Its precision allows calibration of a wide range of measuring devices, including energy meters, measuring transducers, and power quality measurement devices.
R&D and production
Its accuracy and flexibility make it ideal for protection and measurement equipment manufacturers in research and development, production, and type testing.
Key Capabilities
- High-accuracy signal generation
- Protection device testing
- Universal calibrator functionality
- Energy meter calibration
- Power quality device calibration
- PMU and transducer support
