ASTM D6786 – Particle Count in Mineral Insulating Oil Using Automatic Optical Particle Counters

Insulating oils cool and electrically insulate transformers, high voltage capacitors and other electrical equipment.  Particles in these fluids, even particles too small to be visually observed, may decrease the performance and life of the oil and damage expensive system components.  This test determines the number and distribution of particles in insulating fluids.

Using an automatic optical particle counter, the number of particles in the following size classes:  >4µm, >6 µm, >10 µm, >14 µm, >21 µm, >38 µm and >70 µm are determined and reported. 

Price: $193.00

Sample size: 1 pt

Related tests:

• ASTM D1275 – Corrosive Sulfur in Electrical Insulating Oils
• ASTM F312 – Particulate Contamination (Suggest FTM-3012)
• FTM-3012 – Particulate Contamination by HIAC
• ISO 4406 – Particulate Contamination, by HIAC Particle Counter, ISO Cleanliness Code
• NAS1638 – Particulate Contamination by HIAC
• SAE 749 – Particulate Contamination
• SAE ARP 598B – Particle Count
• SAE J1165 – ISO Cleanliness Code, ISO Solid Contaminant Code
• WQTM-611 – Particle Count, BASF Method