The document applies to refrigerator oils of group KA in accordance with DIN 51503-1. It specifies the method for testing the resistance of refrigerator oils in contact with ammonia in the presence of atmospheric oxygen.
DIN 51538:1998 history
1998DIN 51538:1998-09 Testing of lubricants - Testing of resistance of refrigerator oils to ammonia
1998DIN 51538:1998 Testing of lubricants - Testing of resistance of refrigerator oils to ammonia