ALTANA Z7-Z10 Bubble Viscometers - Manual (Page 8)

7
Directions for Using the Gardner Bubble Viscometer
mm. and should be used for exact determinations.
However, this close tolerance is relatively expensive,
and for the sake of economy, tubes having the
same approximate diameter with a tolerance of
± 0.150 mm. Grade “B” are used by many
manufacturer for general factory control tests.
This viscometer meets the requirements of ASTM
D 154, D 555, D 1131, D 1545, D 1725, FTMS
14la-Method 4271, and AOCS Method Ka6.
Approximate Viscosity in Stokes at 25º C (77º F)
U 6.66
V 8.89
W 10.7
X 12.0
Y 17.4
Z 22.9
Z-1 29.1
Z-2 40.6
Z-3 48.4
Z-4 72.4
Z-5 99.2
Z-6 150.8