Operating Instructions for U-Tube Viscometer
Charge viscometer through tube L up to point G with a slight excess of sample. Mount the viscometer in a constant temperature bath. When the temperature equilibrium with the bath has been attained, adjust the volume of the sample so that the bottom of the meniscus settles at the top of mark G. Apply gentle suction to tube N to bring the liquid level to a point 5mm above timing mark E. Release the suction and record the flow time taken for the bottom of the meniscus to pass from the top edge of mark E to the top edge of mark F. Repeat flow times as required for calculation of determinability.
Poulten Selfe & Lee Š 2011 Version: 022011