Revision H, 11/10 VK 7025 Dissolution Apparatus Page 33
P/N 70-9033 Operator’s Manual Setup
Varian, Inc.
Step 3. Press and hold DRIVE DOWN until the drive unit is at its lowest position.
Step 4. Gently press down the shaft until the desired height is reached.
Step 5. Place a shaft locking ring on the top of the shaft and slide it down until it
rests on the shaft collar.
Step 6. Rotate the shaft locking ring so the drive positioning teeth on both the
shaft locking ring and the shaft collar rest against one another, locking
Tighten the set screw using the 7/64-inch T-handle Allen wrench
provided. The intrinsic dissolution apparatus is set at the desired height
above the bottom of the vessel.
Step 7. Repeat this procedure as applicable for additional positions.
Removing the Dissolution Apparatus
To remove paddles, baskets, rotating cylinders or intrinsic dissolution apparatus,
complete the following steps:
Step 1. Loosen the set screw on the shaft locking ring using the 7/64-inch
T-handle Allen wrench and remove the shaft locking ring. Repeat this
step for all positions.
Step 2. Raise the drive unit to its home position and gently remove the shafts
taking care not to drop them into the vessels.
Note
There is a safety mechanism in the bottom of the left side guide
rod which keeps the drive unit from lowering improperly. If the
rods do not line up precisely with the holes in the vessel plate,
the mechanism engages and the drive unit stops lowering and
rises to the home position. See Figure 4, “Drive Unit Guide
Rods,” on page 24.
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