Removing An Alpha Unit; Opening An Alpha Unit; Closing An Alpha Unit - BIO RAD PTC-200 Operation Manual

Removing an Alpha Unit

1. Turn the DNA Engine cycler off (see the Caution below).
2. Pull upward on the handle. When the lock releases, you will hear a click, and the
Alpha unit will slide a little toward the back of the DNA Engine cycler. The elec-
trical connectors of the Alpha unit and the DNA Engine cycler are now
disengaged, so there is no danger of electrical shock.
3. Slide the Alpha unit toward the rear of the DNA Engine cycler about 3 cm.
4. Grasp the front and back edges of the Alpha unit, and lift it out of the machine.
Caution:

Opening an Alpha Unit

Grip the front edge of the top lever of the Hot Bonnet
and pull upward firmly. The top lever will pop open to reveal the entire thumbwheel
(fig. 4-2B). Continue pulling upward to open the Hot Bonnet lid. The Hot Bonnet lid
will tip backward, revealing the entire block.
Caution:

Closing an Alpha Unit

Press down on the top lever. The lever will close down over the thumbwheel as the
Hot Bonnet lid closes down over the sample block. A click signifies that the
Hot Bonnet lid's latch has engaged.
Figure 4-2 Opening an Alpha unit.
A
Do not insert or remove an Alpha unit with the DNA Engine
cycler turned on; electrical arcing can result. Read the safety
warning at the front of this manual regarding electrical safety
when inserting or removing an Alpha unit.
Do not pull on the thumbwheel to open the unit. This can
damage the Hot Bonnet lid's closing mechanism.
Tech Support: 1-800-4BIORAD • 1-800-424-6723 • www.bio-rad.com
® lid as shown in figure 4-2A,
B
Operation
4-5