1. Measurement Accuracy 

Accuracy refers to how close the machine's measured value is to the true physical value of the unbalance.

• Definition: It indicates the error between the "indicated unbalance" (what the screen shows) and the "actual unbalance" of the rotor.

• Why it matters: High accuracy ensures that the operator is not chasing "ghost imbalances" and that parts are corrected to the exact level required by international standards (like ISO 21940).

• Key Phrase: "High measurement accuracy ensures that your rotors meet exact quality standards on the first attempt."

2. Repeatability

Repeatability refers to the ability of the balancing machine to produce the same measurement result consistently when the same rotor is tested multiple times under the same conditions.

• Definition: It is the consistency of the readings across several cycles. If you balance a rotor, remove it, remount it, and balance it again, the machine should display the same unbalance magnitude and angle.

• Why it matters: This is the hallmark of a reliable industrial machine. If repeatability is poor, the machine is unreliable, and operators will lose trust in the system.

• Key Phrase: "Superior repeatability guarantees consistent quality across your entire production batch, eliminating the need for constant re-checks."

3. Sensitivity 

Sensitivity refers to the smallest change in unbalance that the machine can detect and register.

• Definition: It is the ratio of the output signal change to the input unbalance change. A high-sensitivity machine can pick up even the tiniest amount of mass imbalance (often measured in micrograms).

• Why it matters: This is critical when balancing high-speed or precision components. A machine with low sensitivity will simply ignore small imbalances, leading to vibration issues once the part is in high-speed operation.

• Key Phrase: "Enhanced sensitivity allows for the detection of even the smallest residual unbalance, essential for high-RPM applications."

Summary Table for Marketing/Technical Sheets