PID Control 83
User Guide v 2.3 — September 2015 Making Adjustments
When all selected zones complete the ART process, a checkmark will appear for each
zone.
3. To cancel the ART process at any time, touch the Cancel ART Process button.
7.7 PID Control
Altanium offers the choice of using ART (automatic tuning), or PID (manual tuning). To use
PID on a zone or zones, the following provides a simple explanation of each parameter (P, I,
and D).
7.7.1 Typical PID Values
The following is a list of some typical PID values.
7.7.2 Possible Causes of Oscillation
It is possible to set the control terms incorrectly, inducing an oscillation. The following are the
most common causes:
Table 7-6 PID Values
Proportional Integral Derivative Type Example
015 010 002 Fast Probes or heaters with internally located
thermocouples
050 020 000 Fast
020 010 000 Fast
015 015 000 Fast
020 007 100 Medium Probes or heaters with internally located
thermocouples (larger mass)
020 005 200 Medium
100 003 000 Slow Manifolds or heaters with externally
located thermocouples
075 003 150 Slow
Table 7-7 Possible Causes of Oscillation
Cause Description
"P" too large Power change too great per °C of temperature change.
"I" too large Power changing too quickly for the process to follow it.
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