Introduction
The model 990-05-XX-01-CN is a Velomitor® Series Piezoelectric AC Accelerometer from PCB Piezotronics, configured for the Chinese market (as denoted by the -CN suffix). This model is part of a family of industrial-grade, low-frequency vibration sensors designed for measuring dynamic vibration where low-frequency performance is critical. The "XX" in the model number is a placeholder that specifies the sensitivity value (e.g., -50 for 50 mV/g, -100 for 100 mV/g, -500 for 500 mV/g). This accelerometer outputs a raw AC voltage signal proportional to acceleration and is specifically engineered with a low-frequency response, making it ideal for monitoring slow-speed machinery and structural vibrations. Its rugged, stainless steel construction ensures reliability in harsh industrial environments.
Parameters / Specifications
The following table outlines the key technical parameters for a typical 990-05-XX-01-CN series accelerometer.
| Parameter | Specification / Range |
|---|---|
| Model Number | 990-05-XX-01-CN (e.g., 990-05-100-01-CN for 100 mV/g) |
| Description | Low-Frequency, AC-Coupled, Industrial IEPE Accelerometer |
| Physical Dimensions | Approx. 65 mm (2.56 in) height x 29 mm (1.14 in) diameter (hex) |
| Weight | Approx. 170 grams (6.0 oz) |
| Measurement | Dynamic Acceleration & Vibration |
| Output Signal | AC Voltage (IEPE/ICP® compatible) |
| Sensitivity (XX) | Variable: e.g., 50 mV/g, 100 mV/g, 500 mV/g (±10%) |
| Frequency Range | 0.5 to 4,500 Hz (±3 dB) |
| Low-Frequency Cutoff (-5%) | Typically 0.3 Hz |
| Dynamic Range | ±10 g Peak (for 500 mV/g), up to ±100 g Peak (for 50 mV/g) |
| Power Supply | 18 to 30 VDC, 2 to 20 mA constant current IEPE/ICP® |
| Electrical Connection | 10-32 coaxial connector, top exit |
| Housing Material | Stainless Steel |
| Operating Temperature | -55°C to +120°C (-67°F to +248°F) |
*Note: The "XX" sensitivity code is critical for defining the sensor's performance and dynamic range. The extended low-frequency response (down to 0.5 Hz) is a key feature of the "-05" series. The "-CN" suffix indicates a version for the Chinese market. Always confirm the full model number for exact specifications.*
Application Scenarios
The 990-05-XX-01-CN series accelerometer is specialized for applications involving low-frequency vibration and slow-speed machinery.
Low-Speed Machinery Monitoring:
Ideal for monitoring very slow-speed rotating equipment such as kilns, large dam gates, draglines, and heavy-duty conveyors in mining and mineral processing, where the fundamental vibration frequency is extremely low (below 2 Hz or 120 CPM).
Structural Vibration Monitoring:
Used to monitor absolute vibration on large structures that vibrate at very low frequencies, such as wind turbine towers, bridges, buildings, and large industrial frames and foundations.
Hydroelectric Turbine Monitoring:
Excellent for monitoring vibrations on large hydroelectric turbines and generators, which operate at very low speeds (e.g., 60-120 RPM) and generate low-frequency vibrations.
Predictive Maintenance (PdM) on Heavy Industry Assets:
Permanently mounted on critical, slow-speed assets in pulp and paper, cement, and metal processing plants to collect vibration data for trend analysis and early fault detection of gearboxes and large bearings.
Chinese Market Compliance:
The
-CNdesignation makes it suitable for projects and system integrations within China, ensuring compliance with local standards and requirements.
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