THORLABS CLD101 Series, Руководство по эксплуатации

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CLD101x
Use the arrow buttons to select a parameter, then
push EDIT button, or push the selected topic a
second time.
Below the PID optimizing procedure is described
in detail.
1. Set the Temperature Set Point to the required
temperature.
2. Set the P share to a very low value (e.g. 0.2)
and the D and I shares to minimum (0) in the
PID control loop settings menu. Set the
Oscillation Period to Minimum (0.2 s).
3. Switch on the TEC output. Watch the course of the actual measured temperature.
Note
If temperature oscillates continuously, or even builds up to increasing amplitude, switch the TEC
output off immediately. Further decrease the Proportional parameter before switching the TEC
output on again.
Proportional (P) share:
Repeatedly increase and decrease the
temperature set point for about (1…2)°C around
the desired target temperature. Watch the settling
behavior of the actual measured temperature.
Increase the P share gradually. By increasing P
share, the settling time will decrease. Too high
values will increase the amplitude and number of
overshoots. This may lead to an unstable system
(continuous
oscillation or even increasing
amplitude), which should be avoided. The P
parameter is set optimally if the oscillation is
notably damped - the actual temperature approaches the set point with each overshoot having
about half the amplitude of the previous overshoot. Due to the disabled Integral constant, a
temperature deviation may remain. Please evaluate the time span between the maximum
temperature of the positive overshoot and the minimum temperature of the following negative
overshoot (i.e., half a period); doubling this value will be approximately equal to the full period of a
continuous, undamped oscillation.