ISO 10816-3 ISO 20816 V4
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VELOCITY ZONES (mm/s)
Zone A — ≤ 2.3 — Good
Zone B — ≤ 4.5 — Satisfactory
Zone C — ≤ 7.1 — Unsatisfactory
Zone D — > 7.1 — Dangerous
Kurtosis < 3 — Normal
Kurtosis 3–5 — Monitor
Kurtosis > 5 — Fault likely
TEMPERATURE (°C)
< 30°C — Normal
30–36°C — Elevated
> 36°C — High
RMS VELOCITY (mm/s)
≤ 1.8 — Good
1.8–4.5 — Acceptable
4.5–7.1 — Marginal
> 7.1 — Unacceptable
SKEWNESS
|sk| < 0.5 — Normal
0.5–1.0 — Monitor
> 1.0 — Fault likely
CREST FACTOR
< 2.5 — Normal
2.5–4.0 — Monitor
> 4.0 — High
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Upload a pump CSV to begin ISO vibration analysis. Supports kurtosis, velocity (mm/s), temperature (°C), RMS velocity, skewness and crest factor per axis. Optional metrics are detected automatically — the tool works with whichever columns are present.

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