OperationModel 2500 74
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5 Loosen the locking collar on each shaft.
6 Place a strip of masking tape (or any stiff tape) across the bottom of the rotating cylinders.
Install and secure (finger tight) the rotating cylinder (short or long) onto each shaft.
7 Gently drop the 2.5cm plastic ball(s) into the each vessels and allow them to rest in place.
8 Lower the drive head onto the height adjustment block and turn the drive lift knob to lock
position. Gently push down the shaft until the tape across the bottom of the rotating
cylinders touches the 2.5cm ball.
9 Lock each shaft collar using a 5/64 inch hex wrench. Do not over-tighten the set screws on
the shaft collars and avoid putting any weight on the drive head when performing this
step.
10 Fully raise the drive head and turn the knob to lock position. Discard the masking tape.
11 Lower the drive head and turn the knob to lock position. The distance between the
rotating cylinder and the inside bottom of the vessel is set and maintained during the test.
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