Brookfield DV-III Ultra Rheometer - Manual (Page 95)

Brookfield Engineering Laboratories, Inc. Page 95 Manual No. M/98-211-B0104
Brookfield Engineering Laboratories, Inc. Page 95 Manual No. M98-211-E0912
APPENDIX A - Cone/Plate Rheometer Set-Up
This Cone/Plate version of the DV-III Ultra 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 (0.013mm).
Programmable DV-III Ultra 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.
The following information explains how to set the Electronic Gap and verify calibration of the DV-III
Ultra Viscometer. Acceptable operating temperature range is 0ºC to 100ºC. Be careful about condensation
and the possible formation of ice crystals when approaching 0ºC. Setting the gap should be accomplished
at the same temperature that you intent to use for testing your material.
A.1 ELELECTRONIC 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).
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.
Figure
A-1
Pilot Light
(red)
Toggle Swtich
Contact Light
(yellow)
Sliding Reference
Marker
Micrometer
Adjustment Ring