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ASPYRE® provides increased thermal
performance
To illustrate the difference between
open and power feedback, we will compare two very similar systems.
Two 750-watt
cartridge heaters
A 50-watt light
bulb
120 VAC
F4T temperature
controller - 250 degrees Fahrenheit setpoint - Thermocouple Type J input - PID P=35, I=215, D=35 - Data log interval at 5 seconds
ASPYRE DT power controller
One system will
use open feedback and the other will use power feedback. The difference is
evident when each system loses one of two heaters.
In this traditional closed-loop system, the
heaters are controlled with a simple on-off command. The power controllers are
programmed to blindly turn on-off when given this command signal from the
temperature controller using only temperature monitoring. When a single loop or
heater fails, the temperature must drop multiple degrees for the problem to be
detected by the sensors. Then the still functioning heater must operate longer
to compensate for the failure before hitting the set point. There is often a
time lag in both the temperature drop, and for the correction to take place.
This lag time of both detection and recovery keeps the system out of the
desired parameter for a painful period of time. Also, standard controllers will
not diagnose the issue and alert operators.
This system acts more
reactively. And if temperature precision is key for the thermal application, it
cannot be reliably met. The system only reacts to a temperature disturbance,
and by then it can be too late. The graph below shows the variance in
temperature and how long it drops out of the parameters for the application as
the system reacts to the heater outage.
In a closed-loop system
with an ASPYRE smart power
controller, the system can be setup up similarly with a set point temperature.
However, the power controller does not rely solely on temperature sensors to
maintain thermal performance, it uses closed-loop power feedback in the system.
That means when a loop or individual heater goes down, the ASPYRE knows immediately
and can adjust the energy being delivered to the remaining heater to maintain a
constant temperature the entire time. Fine-tuned precision is achievable
consistently and reliably.
The ASPYRE is a proactive
controller that recognizes issues as they happen and automatically adjusts to
compensate. Plus, the ASPYRE’s diagnostics
capability ensures that malfunctioning components in the system are immediately
identified for service. The graph below demonstrates how ASPYRE maintains a nearly
constant temperature even with a load malfunction.
The ASPYRE family of power
controllers is a game changer. It monitors power in a thermal system real time,
provides proactive thermal control while also assisting with troubleshooting by
intelligently providing diagnostics to aid with maintaining production quality,
ideal system performance and reducing costly downtime. By not relying solely on
temperature change, ASPYRE
provides unmatched
thermal precision.
The ASPYRE family of power
controllers is a game changer. It monitors power in a thermal system real time,
provides proactive thermal control while also assisting with troubleshooting by
intelligently providing diagnostics to aid with maintaining production quality,
ideal system performance and reducing costly downtime. By not relying solely on
temperature change, ASPYRE provides unmatched thermal precision.
Anderson-Bolds
216-360-9800
www.anderson-bolds.com
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