Conradson residue

OELCHECK test instrument: Micro Conradson
Sample quantity: 5 ml
Unit: % (weight)
Test result: Conradson carbon residue
Analysis for: heat transfer oils, compressor oils
Brief description: Carbon residue indicates the amount of residue produced when 3 grams of the oil for testing is smouldered in a special Conradson apparatus under defined conditions.

Residue in the form of carbon deposits or coke may be produced when mineral oils are exposed to excessive thermal load or do not combust completely due to a lack of oxygen. For heat transfer oils, carbon residue is an assessment criterion for oil change prolongation.

For alloyed, low-ash compressor oils (VBL, VCL), potential deposits on valves can be detected from the carbon residue.

Underlying test standard: DIN EN ISO 10370, ASTM D4530 (comparable results as ASTM D189)
Comparable methods: DIN 51551-1: big approach
ASTM D189: big approach