Brookfield Falling Ball KF20 - Manual (Page 6)

Brookfield Engineering Labs., Inc. Page Manual No. M09-352-B04
b. eliminate the formation of air bubbles
c. avoid a build up of pressure (see Fig. 3 and 4)
5. Mounted on the lower plate are tubes (10) to which the circulating temperature bath tubing
is attached.
NOTE: Any alteration, modification or replacement of the sample tube, water jacket,
falling tube screw fittings, tension rods or balls renders the ball constants invalid
and requires the re-calibration of the viscometer. See Appendix B.
6. The thermometer fastening screw (11) and sealing washer (13) with inserted thermometer
is screwed into the screw neck (12) in the upper plate. The thermometer fastening screw
should be tightened securely to prevent fluid leakage.
7. The primary function of the ball gauge is to distinguish the two glass balls (Ball No. 1 and
Ball No. 2) from each other. Ball No. 1 will not pass through the ball gauge, whereas Ball
No. 2 will pass through. The ball gauge may also be used to help identify Ball No. 2 through
4.
Ball Gauge (p/n FB68)
Balls (set of 6)
(p/n FB1-FB6)
Case (p/n FB22)
Figure 1
NOTES:
Ball diameters, weights, densities and ball constants (forwards and backwards) are
listed in the test certificate accompanying the viscometer.