5.3 Property Categories 5.3.1
Temperature Controller Values
NOTE: 90% of all applications control with the “Tools > StandardConfig > Set Standard Control Speed” setting.
This section contains properties related to closed loop temperature controller mode. The properties in this section that
will most often require alteration by the user are the controller gain settings ‘Proportional Gain’ and ‘Differential Gain’
The G1 Actuator is designed to provide accurate and stable temperature control over a wide range of conditions without
altering the default factory setup. However, in some applications it may be necessary to make adjustments to maintain
stability of control.
Proportional Gain (P Gain)
This value denes how quickly the Actuator will rotate to compensate for a deviation from the set point. It is the
Property that controls the overall speed of the controller. A P gain that is too low will result in a slow response to system
disturbances, while a value that is too high may result in instability (oscillation).
Differential Gain (D Gain)
D Gain is best thought of as a compensation factor for lag in the temperature measurement system. It helps to prevent
overshoot in response, and to assist in giving quick response to disturbance. In general this is a negative value. A
Dierential gain that is too small may cause an overshoot. A value that is too large (or a positive value) will cause
serious instability.
T
able 5.1: Proportional and Differential Gain values.
5.3.2 Setting “Standard Config” Control Speeds
The G1 actuator can have the gains automatically set to 3 standard values: Standard, Fast or Slow.
To select a particular temperature controller speed, follow the menu as per Figure 5.5.
Figure 5.5: Selecting a temperature controller speed.
Controller Gain Setting Application Description P Gain D Gain
Standard (>90% of applications) Moderate flow without major pressure imbalance 200 -20
Fast High flow with well balanced water supply pressures 500 -50
Slow Low flow and/or imbalanced supply pressure 100 -10
Armstrong
International
221
Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Phone (269) 279-3602 Toll Free (888) HOT-HOSE (468-4673)
Designs, materials, weights and performance ratings are
approximate and subject to change without notice. Visit
armstrong
international.com/emech for up-to-date information.
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