Brookfield DV3T Rheometer - Manual (Page 95)

Brookfield Engineering Labs., Inc. Page 95 Manual No. M13-2100
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.
Note: The motor should be OFF.
2. If the contact light (yellow) is illuminated, turn the
micrometer adjustment ring clockwise (as you look
down on the instrument) until the light is no longer
illuminated (see Figure A-5).
3. If the yellow contact light is not illuminated, slowly
turn the micrometer adjustment ring in small
increments (one or two scale divisions) counter-
clockwise.
Continue moving the micrometer adjustment ring
slowly counter-clockwise until the contact light
(yellow) first turns on. THIS IS THE “HIT
POINT.”
4. Adjust the sliding reference marker, right or left,
to the closest full scale division mark (see Figure
A-6).
5. Turn the micrometer adjustment ring one scale
division to the left to meet the line on the sliding
reference marker. THE YELLOW 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.
The viscosity of electrically conductive fluids
may be affected if readings are taken with the
Electronic Gap Setting feature “on”. Be sure to
shut the feature “off” before taking readings!
7. Carefully remove the sample cup.
Note:
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 rheometer when cleaning.
3. Re-establish the hit point every time the spindle is attached/detached.
Moves Away
from Hit Point
(clockwise)
LEFT x
Moves Towards
Hit Point
(counter-clockwise)
RIGHT
Full Scale
Division Marks
Sliding
Reference
Marker
Figure A-5
Figure A-6