C.B.S. Scientific TTGEK-2401-220 - Manual (Page 29)

TTGE Instruction Manual, version 8/30/2011
29
www.cbsscientific.com
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3.3 Heater/Stirrer Programming- con’t.
22
Example B
Initial Bath Temperature = 25°C
Program Priority = Temperature
Desired Profile: Cool bath temperature to 20°C and hold it there for 10 minutes.
Decrease bath temperature to 10°C over 15 minutes.
Hold bath temperature at 10°C for 15 minutes.
Increase bath temperature to 50°C over a 1-hour period.
This example requires a 5-step program:
Program
Step
Step Set
Point
Step
Duration Controller Operation
1 20°C 10 minutes
Controller cools fluid to 20°C as fast as possible. Until
20°C temperature set point is achieved, “Starting”
appears on the display. When fluid temperature reaches
20°C, “Running” appears on the display.
Fluid temperature is maintained at 20°C for 10 minutes.
2 20°C 15 minutes
Controller cools fluid to 10°C set point programmed for
Step 3. Ramp rate is based on the 15 minute step
duration.
3 10°C 15 minutes Fluid temperature is maintained at 10°C for 15 minutes.
4 10°C 1 hour
Controller slowly heats fluid until 50°C set point
programmed for Step 5 is reached. Ramp rate is based
on the 1 hour step duration.
5 50°C 1 second
“Complete” appears on the display. 50°C fluid
temperature is maintained until set point is changed.
0
5
10
15
20
25
30
35
40
45
50
55
0 5 15 30 45 60 75 90 105 120 135 150 165
Minutes
Degrees C
Step 1
Step 2
Step 3
Step 4
Step 5