ASTM D4283 standard test method for viscosity of silicone fluids
4. Apparatus
4.1 Viscometer Recommendations:
4.1.1 Ostwald Viscometer - up to 5000 cSt.
4.1.2 Ubbelohde Viscometer - up to 100 000 cSt.
4.1.3 Cannon Fenski - up to 5000 cSt.
4.2 Constant Temperature Bath, of 25 6 0.2 °C.
4.3 Cleaning Solution for Viscometers, such as toluene, alcoholic KOH.
4.4 Fluid Standards, for calibrating viscometers.
4.5 Stopwatch.
5. Preparation of Sample
5.1 After charging the fluid to the selected viscometer and placing it in the constant temperature bath, keep in bath for a minimum of 15 min to reach the proper temperature level.
6. Calibration
6.1 Viscometer Constant (F) - Consult the manufacturer's instructions for calibrating individual viscometers.
