Determination of the evaporation loss of lubricating oils (particularly engine oils).
Procedure A uses the Noack evaporative tester equipment.
Procedure B uses the automated non-Woods metal Noack evaporative apparatus.
Measuring Noack Principle
A quantity of 65 grams of sample is heated to a specific temperature and maintained for 1 hour while it is enclosed in a crucible, the crucible’s cover is shaped to allow a constant vacuum of -2 mbar to remove from the crucible the evaporating portion of the sample.
At the end of the test, the sample is cooled and then reweighted: the difference, reported in percentage, represent the sample’s Evaporation Loss by the Noack Method.
Method A: bath is controlled at 250°C.
Method B: the sample is controlled at 245.2°C.
Measuring Temperature Probe
- Platinum resistance PT100 class A
Measuring Parameters
- Temperatures: in °C
- Testing range: +225°C to +275°C
- Measuring range: 0°C … +320°C
- Resolution: 0.01 °C
- Accuracy: ± 0.1 °C
- Repeatability / Reproducibility: according ASTM D5800 or better
Electronic regulator for automatic control of differential pressure
- Differential pressure 20 mm H20, accuracy 1%
Crucible, Crucible Cover and Heating Block
- Same dimensions and volume as ASTM D5800
- Electrically heated new designed aluminium block, no Woods metal needing
Heating unit
- Electrical resistance, 500 W
Vacuum Pump
- Equipped with high resistant Kalrez valve, inlet filter to remove product residuals
- Automatic electronic control system able to maintain the -2mB during the analysis
- Low voltage power supply
Integrated Touch Screen Panel PC
- TFT/LCD 8”
- Resolution 1024 × 768, 16.2 M colours
- 2 USB ports for connection to an external printer and/or external PC
- Storage capacity for more than 60’000 analysis
- Lin-Tech operating software Lab-Link running in Windows ambient
- Automatic reading of the weight suggested balance LT/B-2470/BCA500 INT- CAL
Dimensions
- Length 400 mm
- Width 450 mm
- Max. height: 450 mm
Weight
- 22 Kg
Ambient Temperature
- Max 35°C
- H.R. 80%