Specifications

ManualsBrandsAthena ManualsHousehold Appliances6075 series

5.3

Tuning the Controller

5.3.1

Introduction

5.3.2

The Series 6075 is a state-of-the-art automatic tuning PlD temperature con-

troller. The user has the option of automatically selecting the controller’s

PlD

settings or manually setting the unit as desired.

Tuning a

3-Mode

controller involves three (3) major adjustments;

propor-

tional Band (Gain), Rate (Derivative) and Reset (lntegral) action. Athena has

simplified the adjustment procedure with the incorporation of the Rate and

Reset settings into one adjustment

"RT"

which is displayed in seconds of

Rate time. The Reset time is automatically set at six (6) times the displayed

Rate values.

Automatic

PlD

Tuning procedure

NOTE FOR OPTlMUM RESULTS

Set point must be a minimum of 100°F above the starting or

ambient

temperature when tuning is initiated for accurate tuning. Less than

100ºF may not yield effective tuning settings.

Multi-zone applications require Auto-Tune units on each zone and

simultaneous warmup.

Loss of power or a turn-off during the

Auto-Tune

cycle requires a restart

from ambient (or at least

I00ºF

rise to set point) for reliable

PlD

values.

Change of state processes, i.e. solid to liquid or liquid to gas, may

introduce erroneous tuning parameters during process warmup.

Tuning should be done after the change has

occured

5.3.2.1

Damping Settings

Heat Damping Choices (“-At-“: position # 10)

To allow the controller to provide automatic tuning for a wide variety of pro-

cesses that may exhibit varying heating characteristics and/or varying heat-

ing capabilities, the controller offers three damping choices:

00 Low Damping - For processes that (any combination of the following)

are adequately powered with excellent coupling between heater and

probe.

require quick response and the tightest possible temperature control

is desired