EPRO PR6423/002-030 CON021 Tachometric sounding

The EPRO PR6423/002-030 speed monitoring system with CON021 preprocessor is a special solution for turbine monitoring and speed measurement. The following is a detailed description of the system:

1. System composition
Probe: EPRO PR6423/002-030 eddy current sensor
Preprocessor: CON021
2. How it works
Eddy current effect: The eddy current sensor forms an oscillator with the preprocessor, and the amplitude is attenuated when the sensor probe is close to the metal subject. The magnitude of the attenuation is proportional to the distance between the sensor and the measured object.
Calibration: The sensor and preprocessor have been linearly calibrated using calibration material 42CrMo4 before the system is shipped, so no calibration is required during installation.
3. Installation and adjustment
The user needs to adjust the air gap between the sensor and the measuring surface until the desired signal is obtained from the output of the preprocessor.
4. Scope of application
It is mainly used for the speed monitoring of steam turbines and other industrial environments that require accurate speed measurement.
5. Characteristics and advantages
High precision: Based on the measurement principle of eddy current effect, to ensure the accuracy of speed measurement.
Easy to install and adjust: The user only needs to adjust the air gap between the sensor and the measuring surface.
Factory calibration: No need for on-site calibration, simplifying the installation process.
6. Technical parameters (reference)
Supply voltage: Usually 5 V (3… 5 kHz).
Sensitivity: 270 mV/V (5 V power supply).
Working environment: Suitable for various industrial environments, including explosion-proof environment (explosion-proof level up to Eex ib IIC T6/T4).
7. Application cases
In power plants across the country, more than 200 sets of large steam turbines have been running on the speed monitoring system based on EPRO PR6423/002-030 and CON021, to ensure the safety of these units.