Brookfield Bath, Model TC-101 - Manual (Page 16)

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Section 4. Programming
4.1 Writing A Program
Each program will accept up to 10 different temperature points (number 0 to 9) over adjustable time periods.
In each step, setting the temperature point is first, then it is followed by a time. To hold a steady temperature,
two different temperature points must be the same. To ramp a temperature, the next temperature point must
be different than the last temperature point.
To prepare a program, draw a simple graph of times and temps you desire. Label each step from 0 to 9. The
time period of each point is entered at each step. The time to go from one temperature to another is specified
in hours or minutes in the programming step which starts the ramping.
Allowing Proper Time In Programs
Circulating baths are primarily designed to hold temperatures steady rather than change temperature rapidly.
It is easy to underestimate the amount of time needed for the circulator to reach the fluid temperature. If you
do not allow enough time to reach a temperature, the circulator will continue to try to reach within ± 0.1°C of
the desired temperature before going to the next program step.
To complete a program, all 10 steps must be entered, whether or not they are needed. To finish, copy the last
temperature into each of the remaining steps with zero for the time. This cancels the action of the remaining
steps.
Example A
Initial temperature is at 25°C.
1. Go quickly to 20°C and hold temperature for 15 minutes.
2. Go quickly to 30°C and hold temperature for 15 minutes.
3. Ramp slowly up to 50°C over a period of 1 hour.
4. Go down to 5°C and hold temperature indefinitely.
STEP 0 1 2 3 4 5 6 7 8 9 cycles soak
TEMP 20°C 20°C 30°C 30°C 50°C 50°C 50°C 50°C 50°C 50°C 1 5°C
TIME 0.15 0.0 0.15 1.0 0.0 0.0 0.0 0.0 0.0 0.0 — —
Example B
Initial temperature is at 25°C.
1. Stabilize at 20°C for 5 minutes.
2. Ramp slowly from 20°C down to 10°C over 30 minutes.
3. Stay at 10°C for 15 minutes.
4. Ramp slowly up to 50°C over a period of 1 hour.
5. Once reaching 50°C shut off circulator.
STEP 0 1 2 3 4 5 6 7 8 9 cycles off
TEMP 20°C 20°C 10°C 10°C 50°C 50°C 50°C 50°C 50°C 50°C 1 —
TIME 0.05 0.30 0.15 1.0 0.0 0.0 0.0 0.0 0.0 0.0 — —