I. Core Functions of Atlas Copco Air Compressor HOURMETER
Real-time Speed Monitoring
Real-time display of the operating speed of the air compressor motor (or screw unit), which directly reflects the current load status of the equipment (such as an increase in speed during loading, a possible decrease or maintenance idle speed during unloading).
Performance Correlation Reference
Speed is directly related to the exhaust volume and energy consumption (the higher the speed, the usually larger the exhaust volume per unit time). Through the speed meter, it can assist in determining whether the air compressor is operating under the rated condition and whether there is a "small horse pulling a big cart" or low efficiency situation.
Fault Warning Alert
If the speed is abnormal (such as a sudden increase, sudden decrease, or excessive fluctuation), it may indicate motor failure, belt slipping (for belt transmission type), or abnormal VSD system (for VSD models), providing important clues for fault troubleshooting.
II. Common Types and Applicable Scenarios
Mechanical Pointer Speed Meter
Simple structure, displaying speed through mechanical transmission or induction, commonly found in some traditional fixed-frequency models.
Features: Intuitive but with lower accuracy, susceptible to vibration.
Electronic Digital Speed Meter
Main type, collecting speed signals through sensors (such as Hall sensors, photoelectric sensors), processed by the control unit, displayed in digital form on the display.
Applicable Models: GA series (especially VSD variable frequency models), G11-G160 mid-to-high-end models, usually integrated in the display of control units (such as MK5/MK6 controllers, Smart Controller).
Features: High accuracy (error usually <1%), capable of synchronously recording the speed change curve, partially supporting linkage with alarm systems (triggering warnings when speed is abnormal).
Remote Monitoring Type
High-end models (such as those equipped with SmartLink system) can transmit speed data to remote monitoring platforms, allowing viewing on mobile phones or computer terminals, facilitating centralized management of multiple devices.
III. Precautions
Normal Speed Range
The rated speed of different models of air compressors varies. Generally, the motor speed is between 1000-3000 rpm (commonly 1500 rpm or 3000 rpm when operating at 50Hz AC frequency), specific values need to be referred to the equipment manual. Variable frequency models (VSD) have a wider range of speeds (such as 300-3000 rpm).
Handling Abnormal Situations
0 speed: Possible reasons include motor not starting, sensor failure, or line breakage. Check the power supply, start circuit, and sensor connection.
Large speed fluctuations: Possible reasons include abnormal frequency module, drastic load fluctuations, or wear of mechanical transmission components (such as belts, couplings). Combine with other parameters (such as pressure, current) for comprehensive judgment.
High/low speed: Exceeding the rated range may lead to increased energy consumption and accelerated component wear.应及时stop the machine for inspection.
Maintenance and Calibration
Regularly clean the speed sensor (such as the sensing head of the magnetic-electric sensor)， avoiding oil contamination and dust affecting signal collection.
If the displayed value deviates significantly from the actual speed (through professional instruments for verification)， contact authorized service personnel for calibration or sensor replacement.
Original Equipment Compatibility
The speed meter (especially electronic sensors) needs to be matched with the air compressor control unit. It is recommended to use Atlas Copco original accessories to avoid data distortion or control abnormalities due to compatibility issues.
