Product Core Brief
- Model: A3120/022-000
- Product Name: CSI 3120 Dual-Channel Bearing Vibration Monitor
- Brand: Emerson
- Series: CSI 3120 Machinery Health Monitoring
- Core Function: Monitors absolute bearing vibration on two channels for small and low-channel-count rotating equipment applications.
- Product Type: Dual-Channel Bearing Vibration Monitor
- Key Specs: 2 channels | PR9268 seismic sensor input | configurable high-pass/low-pass filters | 0/4–20 mA output | IP65 enclosure | software-configurable alarms
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction (Rotation Engine)
For small turbines, pumps, compressors, and fans, losing bearing vibration visibility can delay early fault detection and increase unplanned downtime risk. The EMERSON A3120/022-000, also known as the CSI 3120 dual-channel bearing vibration monitor, is designed for compact and low-channel-count machinery health applications. It accepts seismic sensor inputs and continuously measures absolute bearing vibration, then provides configurable alarms and analog outputs for integration into plant monitoring or protection schemes.
For maintenance and procurement teams, this unit is a targeted spare for existing CSI 3120 installations. Because it matches the dual-channel bearing vibration monitoring function, it helps restore measurement continuity faster during corrective maintenance. A factory-sealed EMERSON A3120/022-000 also reduces the risk of prior field-wiring faults, sensor interface degradation, moisture ingress, or unknown service history.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Emerson |
| Product Family | CSI 3120 Bearing Vibration Monitor |
| Model | A3120/022-000 |
| Channels | 2-channel bearing vibration monitoring |
| Sensor Input | PR9268 seismic sensor type |
| Measurement | Absolute bearing vibration |
| Frequency Filters | High-pass: 5 / 10 / 15 Hz; Low-pass: 50–1500 Hz |
| Analog Output | 0/4–20 mA or 20–4/0 mA; max load 500 Ω |
| Power Supply | Up to 48 VDC; max 1 A |
| Enclosure Rating | IP65 |
| Power Consumption | Max 6 W |
| Operating Temperature | -20°C to +65°C (-4°F to 149°F) |
Note: Exact configuration, alarm setpoints, sensor compatibility, and communication options should be confirmed against the nameplate and CSI 3120 documentation before installation.
Key Selling Points & Differentiators
- Dual-channel bearing vibration monitoring for compact rotating equipment applications.
- Software-configurable measurement ranges, filters, and alarm behavior.
- 0/4–20 mA output supports integration into DCS, PLC, or condition-monitoring systems.
- IP65 enclosure supports industrial environments where dust and moisture exposure are concerns.
- Factory-sealed surplus units help avoid aged sensor interfaces, prior field faults, or moisture damage.
- Suitable for small steam/gas/water turbines, compressors, pumps, and fans.
- Not a direct substitute for CSI 6500, 3300/3500-series monitors, or other vibration protection systems without configuration verification.
Quality Transparency SOP (DYNAMIC GENERATION)
For surplus CSI 3120 bearing vibration monitors, inspection focuses on enclosure integrity, power behavior, and output response:
- Visual QA: Inspect enclosure, connectors, terminal areas, and nameplate for corrosion, impact damage, or missing hardware.
- Anti-static handling: Seal in ESD-safe packaging with humidity indicators before shipment.
- Power-up test: Verify the unit powers up correctly within the specified supply range.
- Output verification: Check 0/4–20 mA output behavior against known input conditions where test infrastructure is available.
- Alarm and configuration check: Confirm alarm relay behavior and configuration access if supported by available test setup.
Technical Risk Avoidance (DYNAMIC GENERATION)
❗ Confirm this is a CSI 3120 monitor, not a CSI 6500 or Bently Nevada module. The A3120/022-000 is a CSI 3120 dual-channel bearing vibration monitor. It is not automatically interchangeable with other vibration monitor families.
❗ Verify sensor compatibility. This unit is specified for PR9268-type seismic sensor input. Using an incompatible sensor can cause incorrect readings or loss of measurement.
❗ Check filter and range configuration. High-pass and low-pass filter settings must match the application; incorrect settings can mask or exaggerate vibration levels.
❗ Confirm analog output wiring. The 0/4–20 mA output loop, load impedance, and polarity must match the receiving system.
❗ Validate alarm setpoints before commissioning. Incorrect alarm thresholds can cause nuisance trips or missed fault detection.
Buyer’s FAQ
Is this a genuine Emerson module?
Yes. The A3120/022-000 is an Emerson CSI 3120 dual-channel bearing vibration monitor. We supply factory-sealed surplus stock when available.
What condition is the unit in?
Units are sold as New Original / New Surplus unless otherwise stated. That means unused, factory-sealed inventory rather than field-removed or refurbished hardware.
Can I use it as a direct replacement?
If your existing installation uses a CSI 3120 dual-channel bearing vibration monitor and the sensor type, filters, and output configuration match, this unit should be a like-for-like replacement. Always confirm the nameplate and configuration first.
What sensors does it support?
It is specified for PR9268-type seismic sensor input. Confirm sensor type and cabling before installation.
How fast can you ship?
Stock availability determines lead time. For urgent vibration monitoring failures, request expedited shipping at checkout.
Do you offer a warranty?
Yes. Warranty terms are provided at checkout. For surplus instrumentation, a clear warranty window helps protect against DOA or hidden inventory damage.
