Description
Emerson A3120022‑000 CSI3120
Technical Specifications
- Measurement Type: Overall vibration velocity
- Output Signal: 4‑20mA analog current signal
- Power Supply: 24VDC loop power supply
- Measuring Range: 0 ~ 22 mm/s vibration velocity
- Operating Ambient Temperature: -40℃ ~ 85℃
- Storage Temperature: -50℃ ~ 120℃
- Relative Humidity: 5% ~ 95%, non‑condensing
- Protection Grade: IP67
- Mounting Form: Direct mounting on machine casing
- Built‑in self‑diagnosis function for sensor and circuit fault
Functional Features High‑precision signal conditioning circuit processes raw vibration signal from piezoelectric sensor.
Signal conversion unit converts vibration physical quantity into standard 4‑20mA analog signal for industrial control system acquisition.
Built‑in self‑diagnosis circuit continuously detects sensor disconnection and internal circuit fault.
Metal housing provides reliable mechanical protection against vibration, dust and moisture on industrial site.
Two‑wire loop power design simplifies field wiring work, only one pair of shielded twisted‑pair cables required.
Supports configuration of vibration alarm threshold for monitored rotating equipment.
Application Scenarios Rotating equipment monitoring in chemical plants, oil refineries, thermal power plants, water treatment plants and mining industry.
It monitors vibration state of fans, pumps, compressors, motors and gearboxes, transmits vibration data to DCS or PLC system for equipment health management.
Performance Parameters Vibration measurement accuracy keeps stable within full rated working temperature range.
Signal conditioning circuit filters high‑frequency noise interference from mechanical operation.
Self‑diagnosis circuit detects sensor open‑circuit fault rapidly.
4‑20mA analog signal maintains low attenuation during long‑distance cable transmission.
Transmitter housing withstands continuous mechanical vibration from monitored rotating machine.
Material Composition High‑strength stainless steel metal housing.
High‑precision piezoelectric vibration sensing chip.
Multi‑layer glass‑fiber epoxy printed circuit board with signal conditioning and conversion circuit.
Hermetic sealing rubber ring for waterproof and dustproof protection.
Nickel‑plated alloy wiring terminals.
Structural Features Compact cylindrical metal housing structure.
External mounting threaded interface for direct installation on equipment casing.
Cable sealing gland at bottom for shielded signal cable entry.
Internal hermetic sealing structure prevents dust and moisture entering electronic circuit.
Internal PCB fixed by shock‑absorbing structure to resist machine vibration impact.
Working Principle Piezoelectric vibration sensor installed on machine casing captures vibration acceleration signal generated by rotating equipment.
Signal conditioning circuit filters and amplifies raw vibration signal. The circuit calculates overall vibration velocity value.
Signal conversion unit converts vibration velocity value into standard 4‑20mA two‑wire current signal.
4‑20mA current signal transmits to DCS or PLC analog input module through shielded twisted‑pair cable.
Built‑in self‑diagnosis circuit monitors sensor connection state and internal circuit working condition continuously. When sensor wire break or circuit fault appears, transmitter outputs specified fault current value to trigger system alarm.
Installation Requirements Mount the transmitter on rigid flat surface of machine casing by threaded installation interface.
Use shielded twisted‑pair cable for signal wiring, cable shielding layer single‑point grounding inside control cabinet.
Install transmitter at the measuring position with strongest vibration response of monitored rotating equipment.
Tighten cable sealing gland to guarantee IP67 protection performance.
Set vibration measurement range and alarm threshold in control system after hardware installation.
Precautions for Use Do not install the transmitter at positions with strong impact and high temperature exceeding rated range.
Check cable sealing gland tightness regularly to prevent moisture ingress.
Do not apply excessive mechanical impact on transmitter housing during installation.
Verify measurement value and loop signal after installation and replacement.
Do not disassemble metal housing of transmitter, internal circuit cannot be repaired on site.
