Applied Biosystems 7900HT User Manual page 277

Re-checking the
Input Stack 1
Applied Biosystems 7900HT Fast Real-Time PCR System and SDS Enterprise Database User Guide
7. Using the Vertical Positioning commands, carefully lower the Plate Handler
arm onto the instrument tray and confirm that the plate rests squarely inside it.
8. Tighten the three black thumbscrews on the platform connecting the 7900HT
instrument and the Plate Handler.
9. Release the plate from the Plate Handler arm.
a. Click
b. Click
10. Click
The Plate Handler arm lowers onto the plate.
11. Save the rotary and vertical offset information:
a. Click
The software records the rotary position for the plate drawer (Zymark
position 2).
b. Click
The software records the vertical position for the plate drawer.
Now that the positions of the Plate Handler and instrument are fixed, the Plate
Handler stacks can be aligned and the positional values recorded.
1. Place an empty plate into input stack 1.
2. In the Zymark Twister Software, click the icon for stack 4.
The Plate Handler arm moves over the input stack.
3. Using the Vertical Positioning commands, lower the Plate Handler arm until it
is 1 cm above the stack and verify that it is centered on the stack. If necessary,
center the stack using the Rotary Adjustment arrows.
4. Carefully lower the Plate Handler arm into the stack. Center the gripper as it
moves down the stack by adjusting the Rotary Adjustment arrows if needed.
5. After the Plate Handler arm is centered inside the stack, click
The Plate Handler arm lowers upon the plate.
Confirm the following:
• The plate is in the middle of the gripper span.
• The plate sensor switch is contacting the plate.
• The gripper does not contact the side of the stack.
6. Click
7. Click
The Plate Handler raises the arm to its highest position. If the plate contacts the
sides of the stack, re-adjust the rotary position of the Plate Handler arm until the
plate moves freely inside the stack.
Contact between the plate and the stack or all stacks may be unavoidable.
Note:
However, try to minimize the contact as much as possible.
.
.
.
, and click .
, and click .
.
.
September 1, 2004 11:39 am, CH_Maintenance.fm
Aligning the Plate Handler
DRAFT
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