The Emerson AMS 2140 Machinery Health Analyzer is a multi-channel, portable instrument for vibration-based condition monitoring of rotating assets (bearings, gears, pumps, fans, motors, spindles, etc.). Its claim to provide the “earliest and simplest indication of bearing failure” comes from combining standard velocity/acceleration measurements with high-frequency impact techniques—classic envelope (demodulation) and Emerson’s PeakVue—in a single device.

How it works (technically)

• Sensor & acquisition chain: Accepts IEPE/ICP piezoelectric accelerometers; provides constant-current power, applies anti-aliasing filters, and digitises signals with a high-resolution ADC.
• FFT & order analysis: Time waveform → windowing (Hanning) → FFT to obtain velocity/acceleration/displacement spectra. With a tach/laser reference it performs order tracking and phase measurements (useful for balancing, coast-down tests, ODS/resonance work).
• Early bearing detection (PeakVue / Envelope): Early bearing defects create short-duration, high-frequency impacts. These excite structural resonances; long before overall vibration rises, envelope demodulation reveals repeating energy at bearing fault frequencies (BPFO, BPFI, BSF, FTF). PeakVue tracks this impact energy in a g-peak/energy metric, giving very early warnings.
• Low vs. high-frequency bands:
  • Low–mid band (≈10–1,000/2,000 Hz, velocity RMS): imbalance, misalignment, looseness, structural issues.
  • High band (≈500 Hz–20 kHz+, acceleration/envelope/PeakVue): bearing surface damage, micro-pitting, poor lubrication, gear impacts.
• Severity assessment: Overall values, trends, alarm/condition bands and symptom bands indicate growth rate and level. Crest factor and kurtosis help distinguish lubrication issues from surface damage.

Practical recipe for “early and simple” bearing indication

1. Sensor mounting: Use a magnetic base on a clean, stiff point; use the same spot each time. Enter the correct sensor sensitivity (mV/g).
2. Velocity check (ISO 10816/20816 range): Fmax ≈ 1 kHz, 1,600–3,200 lines → mm/s RMS to reveal imbalance/misalignment/looseness.
3. Envelope/PeakVue: Set band-pass around bearing resonance (e.g., 500 Hz–20 kHz); record 1–2 s with ≥3,200 lines FFT.
4. Add tach/laser and enable order tracking if speed varies.
5. Interpretation:
   • Rising PeakVue/envelope + lines at BPFO/BPFI/BSF/FTF → early bearing defect.
   • High crest factor but normal overall velocity → lubrication problem / very early damage.
   • Sidebands around defect lines → load/looseness modulation or inner-race issues.
   • If the trend increases across 2–3 routes: relubricate → re-measure → plan bearing change at the next maintenance window.

Typical operating modes

• Route-based data collection: Pre-defined asset/point lists with consistent parameters to build reliable trends.
• Expert modules: High-resolution analysis, low-frequency (SST), PeakVue Bearing/Gear, laser speed detection, balancing, impact/resonance tests.

Why choose the AMS 2140?

• Portable, rugged, multi-channel hardware that unifies ISO velocity measurements with envelope and PeakVue.
• Early warning: Impact-based metrics flag problems before overall vibration rises.
• Clear severity & trends: Simple alarms for operators; deep FFT/order tools for analysts.

For CNC spindles, gearboxes, fans/pumps, using the correct bands and sampling, the AMS 2140 tracks the progression lubrication deficiency → micro-damage → surface degradation early, enabling confident maintenance planning.