14
Make sure all holes in the circuit board are in line and nothing is binding the
circuit board as it is assembled into place.
Make sure the two top mounting holes are in line and the holes for the
power transistor and voltage regulator are in line.
7.
Mount the circuit board by installing the following screws:
Two screws from the top of the PC board into the frame
One screw holding the power transistor to the frame
One screw holding the voltage regulator to the frame
8.
Assemble the dial [60] and secure with screw [79].
9.
Temporally place the cover, with the hairline jewel in it, in place and observe the
position of the hairline with relation to the "0" on the dial.
Remove the cover and adjust the two zeroing screws on the right side of the frame
and against the flat on the Torsion Body. Loosen one and tighten the other to
slightly rotate the torsion body as needed to align the "0" with the hairline.
Recheck using the cover and repeat if necessary. Both zero adjust screws should
be tight against the torsion body when adjustment is complete.
10.
Install Cover be installing the following fasteners:
Two 6-32 x 1/4 long cover to frame screws
Two 6-32 x 1/4 long cover to power supply bracket screws.
Nut cover to speed selector switch
Nut cover to variable speed potentiometer. (Use socket wrenches or nut
drivers).
11.
Install switches. Use hex key wrenches to tighten their set screws. Make sure
these set screws are seated on the flats on the switch shafts.
Power ON/OFF switch
Speed selector switch knob
Variable speed control
12.
Assemble the Dust Shield and the Bob onto the Bob Shaft, then screw the Sleeve
onto the Rotor.
13.
Connect the Model 286 Rheometer to the power source and test its performance.
NOTE: This spring calibration should be verified after assembly of
Rheometer by the silicone oil calibration method. Refer to
Model 286 Instructions.
Summary of Contents for 280
Page 5: ...2 ...
Page 8: ...5 Fig 1 Typical Torsion Shaft Assembly ...
Page 9: ...6 Fig 2 Model 280 Set Up ...
Page 13: ...10 Fig 3 Model 286 Set Up ...
