Brookfield DV-III Rheometer - Manual (Page 54)

Brookfield Engineering Laboratories, Inc. Page 54 Manual No. M/98-211-A0701
A.3 SETTING THE GAP
1. Move the toggle switch to the right; this will
turn on (enable) the Gap Setting Feature.
The Pilot (red) light will be illuminated.
2. If the contact light (yellow) is illuminated,
turn the micrometer adjustment ring clock-
wise (as you look down on the instrument)
until the light is just breaking contact, i.e.,
flickering (see Figure A5).
3. If the yellow contact light is not illuminated,
slowly turn the micrometer adjustment ring
in small increments (one or two scale divi-
sions) counter-clockwise.
Continue moving the micrometer adjustment
ring slowly counter-clockwise until the
contact light (yellow) turns on. Back off
(rotate clockwise) until the light is just
breaking contact, i.e., flickering.
4. Adjust the sliding reference marker, right or
left, to the closest full scale division mark
(see Figure A6).
5. Turn the micrometer adjustment ring one
scale division to the left to meet the line on
the sliding reference marker. THE YEL-
LOW CONTACT LIGHT SHOULD GO
OFF.
6. You have established the gap space needed
for measurement. Now turn the toggle
switch OFF (left); the red pilot light should
go off.
7. Carefully remove the sample cup.
Moves Away
from Hit Point
(clockwise)
LEFT x
Moves Towards
Hit Point
(counter-clockwise)
RIGHT
Full Scale
Division Marks
Sliding
Reference
Marker
Figure A5
Figure A6
Notes
1. The cup may be removed and replaced without resetting the gap if the micrometer adjustment
ring has not been moved.
2. Remove the spindle from the viscometer when cleaning.
3. Re-establish the hit point every time the spindle is attached/detached.