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The QBJ-3PN eccentricity monitoring instrument provides comprehensive monitoring and protection for rotating machinery shafts. This system consists of a monitoring instrument and a 3800XL-Φ8mm eddy current sensor, delivering reliable eccentricity measurement that is essential for evaluating the overall mechanical condition of rotating equipment.
Eccentricity measurement has become indispensable during steam turbine start-up or shutdown operations. The system enables visualization of shaft bending caused by thermal effects or gravitational forces, providing critical data for machinery health assessment.
The rotor's eccentric position (shaft radial position) indicates bearing wear, applied load magnitude from misalignment, and determines shaft azimuth angle for stability assessment.
Technical Specifications
Measurement Range
0～200μm (peak to peak eccentricity)
Frequency Response
0.17Hz～10Hz (1～600cpm) Above 600 rpm: displays shaft vibration signal
Accuracy
Linearity Error: <0.5% (full scale) System Error: <±2%
Output
Constant Current: 4～20mA (DCS compatible) Alarm/Danger Switch: Passive contact DC24V/2A Noise Level: <1% (full scale) no signal
Linear Range
2mm
Operating Temperature
Instrument: -25℃～45℃, relative humidity <80% (Sensor specs per 3800XL-A01 manual)
Dimensions
160mm (W) × 80mm (H) × 260mm (D)
Cutout Dimensions
153mm (W) × 77mm (H) × 260mm (D)
Power Supply
AC220V±10%/50Hz
Main Functions
Independent relay outputs for alarm and danger conditions
Configurable measuring range limits with 4-20mA current output
Disconnection detection protection with 5-second delay recovery
Fully adjustable alarm/danger values within measurement range
Maximum measurement value memory function
Gap voltage measurement display
Automatic return to measurement state after 1 minute of inactivity
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Exporter,Trading Company,Seller
Year Established:
2000
Total Annual:
3 Million-4 Million
Ecer Certification：
Verified Supplier
Our company OUTER ELECTRONIC TECHNOLOGY (HK) LIMITED focus is on steel mills, power plants, cement plant , chemicals, paper, CNC numerical control machine tool industry system spare parts! Main products: DCS system cards, spares of turbine ,generator ,boiler ,blower , coal mill , motor , transformer... Our company OUTER ELECTRONIC TECHNOLOGY (HK) LIMITED focus is on steel mills, power plants, cement plant , chemicals, paper, CNC numerical control machine tool industry system spare parts! Main products: DCS system cards, spares of turbine ,generator ,boiler ,blower , coal mill , motor , transformer...
