Centrifuge Calculator Rpm G

RPM Formula:

\[ RPM = \sqrt{\frac{RCF}{1.118 \times 10^{-5} \times r}} \]

RPM (rev/min):

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1. What is the RPM Calculation?

The RPM (Revolutions Per Minute) calculation determines the rotational speed of a centrifuge based on the relative centrifugal force (RCF) and the radius of rotation. This is essential for laboratory procedures requiring precise centrifugal forces.

2. How Does the Calculator Work?

The calculator uses the RPM formula:

\[ RPM = \sqrt{\frac{RCF}{1.118 \times 10^{-5} \times r}} \]

Where:

\( RPM \) — Revolutions per minute
\( RCF \) — Relative centrifugal force (g-force)
\( r \) — Radius in centimeters
\( 1.118 \times 10^{-5} \) — Conversion constant

Explanation: This formula converts the desired g-force to the corresponding rotational speed based on the centrifuge's radius, ensuring proper separation of samples.

3. Importance of RPM Calculation

Details: Accurate RPM calculation is crucial for achieving consistent results in centrifugation processes, ensuring proper sample separation, and maintaining experimental reproducibility across different centrifuge models.

4. Using the Calculator

Tips: Enter RCF value in g-force units and radius in centimeters. Both values must be positive numbers. The calculator will compute the required RPM for your centrifuge.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between RPM and RCF?
A: RPM measures rotational speed, while RCF measures the actual centrifugal force applied to samples. RCF is more meaningful for comparing centrifugation results across different equipment.

Q2: Why is radius important in centrifugation?
A: The centrifugal force increases with radius at the same RPM. Larger radius means higher g-force for the same rotational speed.

Q3: How do I measure the radius accurately?
A: Measure from the center of the rotor to the bottom of the sample tube when it's in the horizontal position (for swing-out rotors).

Q4: Can I use this calculator for any centrifuge?
A: Yes, this formula applies to all centrifuges, but always verify with your equipment's specifications and safety guidelines.

Q5: What if my centrifuge displays only RPM?
A: You can use the reverse calculation to determine the RCF generated at different radii for your specific centrifuge settings.