IES LM-28-20 PDF Download

The IES LM-28-20 standard provides a comprehensive guide for selecting, maintaining, and using electrical instruments in a photometric laboratory setting. The standard covers a range of topics, including the definition of terms used to describe instrument capabilities for various electrical quantities, angular positioning, optical radiation detectors, airflow, and temperature.

The document emphasizes the need for caution when selecting, maintaining, and using measuring instruments in the photometric laboratory to ensure accurate and reliable measurements. It highlights the importance of maintaining appropriate levels of uncertainty in the measurements and provides guidelines for achieving this.