Standard/ applicable to | Title | Keyword/ Meas. Unit | Conditions | Description |
| DIN 50 981 DIN 50 984 | Layer thickness | µm | DIN 50 982-2 | Determination of layer thickness. |
DIN 51 412-1 Oils | Testing of petroleum products; Determination of the electrical conductivity Part 1: Laboratory method Part 2: Field method | Electrical conductivity/ pS/m (Ohm x cm) | at 23 °C | Procedure for measurement of the electrical conductivity of liquids. Cannot be used with insulating oils. The test makes use of a conductive receptacle containing approx. 100ml of the liquid under test, to which a direct current voltage of 100V is applied. The electrical conductivity can be calculated from the measured voltage drop. |
DIN 51 562-1 Oils | Viscosimetry; Measurement of kinematic viscosity using the Ubbelohde viscometer; Part 1: Geometrical design and performance of measurements | Viscosity/ mm²/s | at 40 °C, at 100 °C Silicone oil at 25 °C | Method for the determination of the kinematic viscosity of transparent, Newtonian liquids in the range 0.35mm²/s to 100,000mm²/s at temperatures between 10C and 100C. The test measures the time taken for a certain volume (measured by two ring marks) of the liquid under test to flow through a capillary tube under the influence of gravity. |
DIN 51 581 Oils | Determination of evaporation loss | Evaporation loss/ | T = 250 °C, 60 min | Determination of evaporation loss of an oil over a specified time period t at a specific temperature T. |
DIN 51 755 Oils, solvents | Determination of flash point using the Abel-Pensky closed cup method | Flash point/ °C | Temperature range from 5 °C to 65 °C | Determination of flash point of mineral oils and other combustible liquids. Other tests are used for higher flash points. |
DIN 51 757 Oils | Determination of density of mineral oils and related substances | Density/ kg/l of g/ml | at 15 °C | To convert mass to and from volume. |
| DIN 51 805 Oils, Greases | Determination of flow pressure of lubricating greases, Kesternich method | Flow pressure/ mbar, °C | Lower operating temperature for lubricating greases according to DIN: flow pressure < 1.400 mbar | A test nozzle filled with lubricating grease is connected to a pressurized gas source and a pressure gauge. At a specific, constant temperature, the pressure is continually increased until the lubricating grease rope snaps and the pressurized gas escapes through the nozzle. The lower operating temperature for lubricating greases according to DIN 51 825 is defined by the flow pressure as maximally 1400 mbar. |
DIN 51 813 Greases
| Determination of the amount of solid substances in lubrication greases, particle sizes > 25 µm | Solids content/ mg/kg or ppm | Only for soap-based lubrication greases without added solid lubricants | Determination of the amount of solids, impurities in lubricant greases that can cause lubrication problems, noise and wear. 500 g of the grease is pressed through a sieve. Then, the residue in the sieve is mixed with a solvent and impurities are washed out. |
DIN 51 817 Greases (Pastes) | Determination of oil separation from lubricating grease under static conditions | Oil separation/ % in mass | t/T | Determination of the bleed properties over a specified time period t and temperature T |
DIN 51 832 Powder | Particle size | µm | d 50, d 99, max. | Determination of average (d50) and maximum (d99) particle size. |
DIN 52 612 Thermally conductive pastes | Thermal conductivity | W/mK | Testing of thermal conductivity of a substance. | |
DIN 53 481 Insulating pastes, Thermally conductive pastes | Dielectric strength | kV/mm | at 20 °C, 0,05 inch separation | Electrical testing. |
DIN 53 482 Insulating pastes, Thermally conductive pastes Electrical greases | Specific resistance | Ohm x cm | at 25 °C, Electrode separation 1 cm, Electrode area 1 cm² | Testing of electrical resistance of a substance. |
DIN 58 397-1 Oils | Evaporation loss | Weight percent | t/T | Determination of the evaporation loss of a lubricant over a defined period of time, t, at a defined temperature, T. |
DIN EN 22719 Liquids | °C | > 79 °C < 65 °C < 5 °C | Lowest temperature at which the evaporating oil can be ignited by an external ignition source. | |
DIN EN ISO 3838 All substances | Density | g/ml | at 20 °C | |
DIN ISO 2176 Greases, pastes | Drop point | °C | Temperature at which the structure of the grease breaks down. | |
DIN ISO 3016 Liquids | Pourpoint | °C | 3°C steps | Temperature at which the oil first becomes capable of flow. |
| Insulating pastes | Dielectric constants | 1 kHz - 10 MHz | Electrical testing. | |
| Insulating pastes | Arc stability | s | Electrical testing. | |
| Insulating pastes | Dielectric loss factor | tan | 1 kHz - 10 MHz | Measurement of dielectric loss factor. |
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