Installing and uninstalling the labware racks
About this topic
This topic explains how to install the labware racks on the BenchCel Microplate Handler and how to uninstall the racks.
Figure BenchCel Microplate Handler (front) with two front-load labware racks
Before you start

Make sure the
BenchCel power and compressed air are turned on before you install or uninstall a labware rack.
When lifting the labware rack onto and off of the stacker head, use both hands to grasp the rack securely around the four corners near the base.

To prevent potential injury, avoid touching the interior edges of a rack when lifting the rack. The interior edges might have sharp surfaces.
Figure Safely lifting a labware rack

The rack-release button at the top of the stacker head on the BenchCel device is sensitive to static electricity. Static electricity can cause a potential loss of motor control and loss of communication with the BenchCel device. Ensure that you discharge any potential static electricity before touching the rack-release button. To discharge static electricity, you can touch the white painted or metal surface of the BenchCel device before touching the rack-release button.
Installing labware racks on the BenchCel Microplate Handler
To install a labware rack:
1 At the BenchCel Microplate Handler, verify that the clamps are closed (extended) in the stacker head.
Note: To close the clamps, open BenchCel Diagnostics. On the Controls page, click Stacker at the top of the rack that you want to remove, and then choose Close Stacker Grippers.
When you install the rack, the prongs in the labware rack tabs will be inserted into the slots in the clamps. If the clamps are open, the slots will be hidden, and you cannot install the rack.
Figure Stacker head with closed (extended) clamps
2 With the rack’s open side facing the front, lower the rack onto the stacker head. Make sure the prongs at the bottom of the rack tabs insert into the slots in the extended clamps.
The rack is automatically locked into position.
Figure Installing a labware rack on the stacker head (closeup view without labware)
Uninstalling labware racks
Before you can remove a mounted rack, you must first unlock the rack. When you unlock the rack, two pins in the stacker head retract, as the following figure shows.
Figure Stacker head with retracted locking pins
To uninstall a rack from the BenchCel Microplate Handler:
1 At the BenchCel Microplate Handler, verify that the stack is unloaded.
To unload the stack, open BenchCel Diagnostics. On the Controls page in the graphical display area, click Stacker at the top of the rack that you want to remove, and then choose Unload Plates.
2 Unlock the rack by doing one of the following:
• Press the green rack-release button at the top of the stacker head. The green status light flashes for 5 seconds to indicate that the rack is ready for removal. A click sounds as the locks retract. If the green light stops flashing, press the button again.
• In BenchCel Diagnostics, click the Controls tab. In the graphical display area, at the top of the rack that you want to unlock, click Stacker, and then choose Unlock rack. A click sounds as the locks retract.
3 Carefully lift the labware rack from the stacker head.
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