Service & Calibration

Size Calibration (non-ISO) is a basic form of calibration for air particle counters. It includes testing and stating the following parameters as per the received data:

1. Size Setting: The calibration of the device to accurately measure the size of particles.
2. Sample Flow Rate: The rate at which air is sampled by the device.
3. False Count: The measure of the device’s accuracy in differentiating between actual particles and false readings.

The ISO 21501-4 Calibration is a more comprehensive calibration standard for air particle counters. It includes all elements of the Size Calibration (non-ISO), plus two additional parameters:

1. Size Resolution: The ability of the device to distinguish between particles of different sizes.
2. Counting Efficiency: The effectiveness of the device in counting particles within a specified size range.

ISO 17025 Calibration represents the highest standard of calibration, combining the requirements of ISO/IEC 17025 and ISO 21501-4:2017. It includes the following five parameters:

1. Size Setting
2. Sample Flow Rate
3. False Count
4. Size Resolution
5. Counting Efficiency

All these parameters are rigorously tested and stated in the calibration report, providing the most comprehensive evaluation of the air particle counter’s performance.

The choice of calibration depends on the required accuracy, industry standards, and regulatory compliance needs. Non-ISO Size Calibration is suitable for basic applications, ISO 21501-4 Calibration is preferred for more precision and compliance with certain industry standards, while ISO 17025 Calibration is essential for the highest level of accuracy and for meeting stringent regulatory requirements.

Yes, ‘as received’ data, which represent the initial state of the device before any calibration adjustments, are included in all three types of calibrations. This data is crucial for understanding the initial performance of the device and for comparing pre-calibration and post-calibration performance.