Brookfield DV-I Prime - Manual (Page 44)

Brookfield Engineering Laboratories, Inc. Page 44 Manual No. M/07-022-D0613
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 clockwise (as
you look down on the instrument) until the
light is just breaking contact, i.e., flickering
(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
r i n g s l o w l y
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 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.
7. Carefully remove the sample cup.
Moves Away
from Hit Point
(clockwise)
LEFT x
Moves Towards
Hit Point
(counter-clockwise)
RIGHT
Figure A-5
Figure A-6
This viscoity 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 taken readings!
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.