DRAFT
September 1, 2004 11:38 am, CH_Overview.fm
7900HT Instrument
Applied Biosystems 7900HT Fast Real-Time PCR System and SDS Enterprise Database User Guide 1-5
Interchangeable
Thermal Cycler
Blocks
The 7900HT instrument features a Peltier-based, interchangeable sample block
module based on the technology established in the GeneAmp
®
PCR System 9700
thermal cycler. The sample block module houses an internal Peltier heating/cooling
unit (Figure 1-4). The sample block module is made of aluminum to provide an
optimal thermal transfer rate between the block and the optical plate or the
TaqMan
®
Low Density Array.
PHYSICAL INJURY HAZARD. Hot Surface. Use care when
working around this area to avoid being burned by hot components.
Figure 1-4 Components of the Interchangeable Thermal Cycler Block
The interchangeable sample block module provides:
• Wide temperature range: 4–99.9 °C
•Accuracy: ±0.25°C from 35–99.9 °C
• Heat/cool rate: 1.5 °C per second
• Temperature uniformity: ±0.5 °C (measured 30 sec after the clock starts)
• Long-term stability and high reliability
• Support for multiple consumable formats (see page 1-9)
• Several different modes of operation including 9600 mode and programmable
temperature ramps (see page 3-21)
• Reduced instrument downtime by allowing immediate replacement of the block
(see page 7-6)
• Easy access to the sample block for troubleshooting and maintenance
(see page 7-6)
Optics System
IMPORTANT! Do not remove the cover to the 7900HT instrument. Only a qualified
Applied Biosystems service engineer may repair or adjust the internal components.
GR2027
GR2028
Circuitry
(Do Not Touch)
Warning
GR2028
Bottom view
Heat sinks
(Do Not Touch)
Connection to the instrument
(Do Not Touch)
Sample block
(Do Not Touch)
Top vi ew
Block inside
instrument