Brookfield Engineering Laboratories, Inc. Page 22 Manual No. M/92-021-N0902
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 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 con-
tact 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)
LEFTx
Moves Towards
Hit Point
(counter-clockwise)
RIGHT
Full Scale
Division Marks
Sliding
Reference
Marker
Figure A-5
Figure A-6
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.
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