off position.
Put the sensor inside the container to be controlled
.
•
Turn on the controller.
•
Turn on the heating device.
3) Setting the temperature.
Press SET key twice. Both 2) and 7) will start to flash. The LED shows the current
temperature setting. Use “+” and “-“ keys to change the setting. When finished, press the
SET again to confirm the change.
Note: the temperature setting will not be changed if SET is not pressed (confirmed). The
display will return to the normal display mode if no key is pressed within 3 seconds.
4) Switching the display between temperature and time.
This is done by pressing the Time Key (“6)”) once. When “8)” is on (lit) and “7)” is flashing
at the same time, LED is in timer mode and shows the actual time passed since the
controller was last powered on. When “8)” is off (not lit), LED is in temperature mode and
shows the current sensor temperature.
5) Setting the timer.
Press SET key once and release it, both 7) and 8) will start flashing. The LED shows the
current timer setting. Use “+” and “-“ key to change the timer setting. When finished,
press the SET again to confirm the change.
Note: the timer setting will not be changed if SET is not pressed (confirmed). The display
will return to the normal display mode if no key is pressed within 3 seconds.
Using the timer
The timer can be used in two different ways.
a) Use it as timer. If you set the timer for 20 hours, the controller will stop sending power
to the cooker 20 hours after it is powered up. It will display “End” on the window and send
an audio beeping sound. Turning off the power and on again will reset the timer.
b) Use it as a clock. Instead of using the timer function, many users just use it as a clock
to find how long the food has been cooked. To use it as a clock, set the time longer than
you need to use, or, just leave it at the original 99.9 hr position. During the operation,
press the “time” button once will change the display from temperature of the pot to the
time that has elapsed since powered up. Press the “time” button again will change the
display back to temperature.
6) Tuning the controller
This controller is shipped with parameters set for commercial rice cooker. You can try to
use this setting for other cooking device also because the setting it suitable for a typical
slow response and balanced system. If you feel the performance is not ideal, you can try
to use the recommended PID parameters listed in Table 1. These are the parameter we
obtain from tuning the system manually. Fig 5 shows how to change them.
6