This machine could be run as needed however it should be scheduled for maintenance to reduce the vibration.

Restricted Operation – the same motor/pump operating a vibration levels between 0.16-0.25 in/sec (pk) or 2.8-4.5 mm/sec (rms) should be considered to have a problem causing excessive vibration, such as unbalance or misalignment.

An acceptable vibration level would be below 0.16 in/sec (pk) or 2.8 mm/sec (rms).

Unrestricted Operation – this assumes a motor/pump that has been in operation beyond original commissioning.

An overall vibration level of 0.08 in/sec (pk), or 1.4 mm/sec (rms) or less would be expected.

Newly Commissioned Machinery – this is assumed to be a new motor and pump, with no wear, operating in a “best case” condition.

Let’s take a 150hp electric motor, driving a pump, at 1765 rpm, on a rigid base, as an example, and use the ISO 10816-3 chart.Īdvised vibration levels in velocity (inches per second/peak) Machines mounted on a flexible base, such as isolator springs or neoprene pads, can tolerate slightly higher vibration levels, since these machine’s movements are dampened, or cushioned, by the isolator or pad. This is because larger machines have larger mass, wider stance, and typically can tolerate slightly higher levels of overall vibration.Įach of these two groups are also separated between Rigid and Flexible mounts. You’ll notice on the chart that Group 1 machines can tolerate slightly higher levels of vibration than Group 2. Group 1 Machines – electric motors and driven machines above 402 hp. Group 2 Machines – electric motors and driven machines between 20-402 hp. All machines falling within this specification run at speeds between 120-15,000 rpm.

To help new users understand the ISO 10816-3 chart, let’s break it down. Accurex™ performs a first order diagnostic based on ISO 10816-3 specifications (based on overall vibration levels in velocity, in inches per second/peak, or mm/sec/rms), and a second order diagnostic based on several thousand rules-based algorithms. The Smart Machine Checker (SMC), and the Falcon (vibration data collector/analyzer) use Accurex™ automatic diagnostic software to determine vibration problems on rotating equipment.

Falcon 4 original iso engineering