How should oil samples from transformers be handled?

Oil samples from transformers should be handled with care to ensure accurate analysis. First, use clean, dry sampling equipment to avoid contamination. Collect samples from the transformer’s sampling valve, ensuring the flow is steady to obtain a representative sample. Seal the samples in appropriate containers, label them clearly with date and location, and store them in a cool, dark place. Transport samples to the laboratory promptly to prevent degradation of the oil’s properties.