Brookfield DV2T Viscometer - Manual (Page 58)

Brookfield Engineering Labs., Inc. Page 58 Manual No. M13-167-B0614
Appendix A - Cone/Plate Viscometer Set-Up
This Cone/Plate version of the DV2T uses the same operating instruction procedures as
described in this manual. However, the “gap” between the cone and the plate must be verified/
adjusted before measurements are made. This is done by moving the plate (built into the
sample cup) up towards the cone until the pin in the center of the cone touches the surface
of the plate, and then by separating (lowering) the plate 0.0005 inch (0.013 mm).
When operating the Cone/Plate at elevated temperature, the gap must be set with the cup
and spindle equilibrated at the temperature recommended. Maximum temperature for Cone/
Plate operation is 80ºC. Maximum operational temperature of sample cup is 100
ºC. Personal
protection is recommended when controlling to temperatures above 80ºC.
Note
: Micrometer Adjustment Ring will become hot when controlling sample
cup at temperatures above 50ºC.
Programmable DV2T Cone/Plate Viscometers, S/N 50969 and higher, have an Electronic Gap
Setting feature. This feature enables the user to easily find the 0.0005 inch gap setting that
was established at Brookfield prior to shipment.
Brookfield recommends that the maximum particle size in the sample material for measurement
with cone/plate geometry be less than 5 times the gap setting. A more conservative approach
is to limit the maximum particle size to less than 10 times the gap setting.
The following information explains how to set the Electronic Gap and verify calibration of the
DV2T Viscometer.
A.1 Electronic Gap Setting Features
TOGGLE SWITCH allows you to enable/disable the
Electronic Gap Setting Feature: left position is
OFF (disabled), right position is ON (enabled).
PILOT LIGHT
is the red (LED) light; when illuminated,
it means the Electronic Setting Function is
sensing (enabled).
Note
: Be sure the light is off before
introducing the test sample.
CONTACT LIGHT is the yellow (LED) light; when it
first turns on, the “hit point” has been found.
SLIDING REFERENCE MARKER is used after finding the
“hit point;” it is the reference for establishing the
0.0005 inch gap.
MICROMETER ADJUSTMENT RING is used to move the cup up or down in relation to the cone
spindle. Turning the ring left (clockwise) lowers the cup; turning it right (counterclockwise)
raises the cup. Each line on the ring represents one scale division and is equivalent to
0.0005 inch movement of the plate relative to the cone.
Pilot Light
(red)
Toggle Swtich
Contact Light
(yellow)
Sliding Reference
Marker
Micrometer
Adjustment Ring
Figure A-1