Flash point

OELCHECK test instrument: Setaflash Series 3,7,8 (small scale closed cup)
Normalab NPM 450 (Pensky Martens, closed cup)
Normalab NCL 440 (Cleveland, open cup)
Sample quantity: small scale closed cup: 30 ml
Pensky Martens cup, Cleveland cup: 200 ml
Unit: °C
Test result: flash point
Result range: flash point, small scale closed cup: 30 - 300 °C
flash point, closed cup: 40 - 370 °C
flash point, open cup: 79 - 400 °C
Analysis for: heat transfer oils, engine oils, fuels
Brief description: The flash point is the temperature at which so much highly flammable steam develops in a pot from the liquid to be tested that it could be momentarily ignited by an external ignition. Measurement methods and devices vary depending on oil type and the expected flash point.
Statement: The flash point of engine oils decreases when fuel enters. This is the key criterion for the flammability of combustible liquids. The breakdown of combustible liquids into various hazard classes is based on the flash point.
Underlying test standard:

flash point, small scale closed cup: DIN EN ISO 3679,  ASTM D3828 , ASTM D7236
flash point, Pensky-Martens closed cup: DIN EN ISO 2719, ASTM D93

flash point, Cleveland open cup: DIN EN ISO 2592, ASTM D92

Deviating methods: ASTM D6450: Use of a different apparatus, ignition mechanism and sample quantity