Brookfield DV-III Rheometer - Manual (Page 52)

Brookfield Engineering Laboratories, Inc. Page 52 Manual No. M/98-211-A0701
This Cone/Plate version of the DV-III+ 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+ 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+ 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 (en-
abled).
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.
APPENDIX A - Cone/Plate Rheometer Set-Up
Pilot Light
(red)
Toggle Swtich
Contact Light
(yellow)
Sliding Reference
Marker
Micrometer
Adjustment Ring
Figure A1