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Appendix D - Using Accutune II
12/03 DR4300 Circular Chart Recorder Product Manual 225
D. Using Accutune II
D.1 Overview
Introduction
Accutune II provides foolproof, trouble-free on-demand tuning in the recorder. No knowledge of the
process is required at start-up. The operator simply enters the desired setpoint and initiates the tuning. The
recorder immediately starts controlling to the setpoint while it identifies the process, calculates the tuning
constants and enters them into the tuning set up group, and begins PID control with the correct tuning
parameters. This works with any process, including integrating type processes, and allows retuning at a
fixed setpoint. The tuning sequence will cycle the recorder’s output two full cycles between 0 % and 100
% (or low and high output limits) while allowing only a very small process variable change above and
below the setpoint during each cycle.
• Accutune works for all control algorithms except ON/OFF.
• The recorder must be in Auto mode.
• Accutune works for integrating processes.
Enable/disable Accutune using the tuning set up group TUNE parameter described in Section 4.
Detailed instructions for using Accutune are provided in this appendix.
What’s in this section?
This section contains the following information:
Topic See Page
D.1 Overview 225
D.2 Starting and Stopping Tuning with Accutune II 226
D.3 Using Accutune with Duplex (Heat/Cool) Control 227