Tempco TEC-9300, Инструкция по эксплуатации

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5–6 Ramp and Dwell
Example 1: Temperature cycling chamber
A chamber is used to test the temperature cycling effect on
personal computers. An external cycle timer is used to control
the event input for switching the set point. The products under
test are required to stay at 60°C for 1 hour and -10°C for 30
minutes. The transition interval between the high and low
temperatures is required to be 5 minutes. Make the following
setup:
EIFN = SP.P2
A1FN = TIMR
OUT1 = REVR, relay output
OUT2 = COOL, 4–20mA output
SPMD = MINR
IN1U = °C
DP1 = 1-DP
The circuit diagram and its temperature profile are shown below:
The TEC-9300 provides a 4–20mA signal to control the speed
of the inverter. SP.P2 is chosen for EIFN in order to create a dual
PID control. You can perform auto-tuning twice at SP1 and SP2
for the initial setup for the dual PID values. Refer to sections
3-19 and 4-3.
Example 2: Programmable bread baking oven
Bread is baked in batches. A ramp is incorporated to control
the thermal gradient to suit for making the bread. A dwell timer is
used to shut off the oven power and announce this to the baker.
The system is configured as shown in the following diagram.
Order a form B relay for alarm 1. Push the ON switch to start
a batch. The temperature will rise with a ramp rate determined by
the RAMP value. The bread is baked with the set point tempera-
ture for a predetermined amount of time which is set in the TIME
value, and then the power is shut off. The temperature profile is
shown in the following figure.
Terminal
, use
Form B Relay
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