
5-9
Creating Programs
Considerations During Program Creation
Once you have written the body of your raw program, there are decisions to make before
creating your Dyad program. They concern how your steps should be implemented. These
decisions involve the following:
•
Temperature control mode
•
Lid control mode
•
Temperature ramping rate (advanced mode only)
•
Temperature hold time
•
Temperature time extend (advanced mode only)
•
Temperature increment (advanced mode only)
•
Temperature gradient (available with the 96-well Alpha unit only).
•
Outside of the example protocol: other considerations
Choosing a Temperature Control Mode
The Dyad cycler can control incubation temperature in three possible ways, each of which
has different implications for the speed and accuracy of sample heating. These include
Calculated Control
,
Block Control
, and
In-Sample Probe Control
.
Calculated Control
When using calculated control, the Dyad cycler estimates sample temperatures based on
the block’s thermal profile, the rate of heat transfer through the sample tube or slide, and
the sample volume or mass. Since this estimate is based on known quantities and the
laws of thermodynamics, sample temperatures are controlled much more accurately than
with block or probe control.
Since the sample temperature will always lag behind the block temperature, the Dyad
cycler can adjust the block temperature to bring samples of a specific volume in a spe-
cific vessel type to programmed temperatures. This is done through optimized “over-
shoots” of the block temperature by a few degrees for a few seconds, which bring
samples to the desired temperature more quickly.
Calculated control is also the method of choice for most types of programs because it
yields the most consistency, reliability, and speed. Calculated control provides for shorter
protocols in three ways:
1. Brief and precise block temperature overshoots are used to bring samples to
desired incubation temperature rapidly.
Summary of Contents for DNA Engine Dyad PTC-220
Page 8: ...1 4 DNA Engine Dyad Operations Manual ...
Page 14: ...2 6 DNA Engine Dyad Operations Manual ...
Page 38: ...4 18 DNA Engine Dyad Operations Manual ...
Page 78: ...DNA Engine Dyad Operations Manual 5 40 ...
Page 109: ...DNA Engine Dyad Operations Manual 8 10 ...
Page 113: ...9 4 DNA Engine Dyad Operations Manual ...
Page 127: ...DNA Engine Dyad Operations Manual 10 14 ...
Page 136: ...11 9 Alpha Units and the Remote Alpha Dock System Figure 11 5 Flush mounting template ...
Page 137: ...11 10 DNA Engine Dyad Operations Manual ...
Page 142: ......
Page 156: ...DNA Engine Dyad Operations Manual In 12 ...
Page 157: ...Declaration of Conformity DoC 1 ...