Details about each parameter.
• SC: Calibration offset. The parameter is used to make the input offset to compensate for
the error produced by sensor. Each unit is 1 degree. e.g. if the temperature displays 2 °C
in ice water mixture, set SC=-2 will make the display to shown 0 degree.
• OUT: Output power reduction. It is expressed as a percentage value. This function will
allow you to control the maximum output power delivered by the heater. For example, if
you set Out=50 and your heater is 1000 watts, the output will use 50% of the 1000 watts
as the full output. It treats the 1000W heater as a 500W heater. When the PID algorithm
determines 50% output value, the actual power output will be 250 watts. This function can
be used in two situations.
1) When you have a very powerful heater and are using a very small pot of water to cook
at very low temperature, for example, a 1400 watts heater with a one litter (1 qt) pot of
water at 130 F. The heater is too powerful for the small water volume. The moment it is on,
it releases too much energy and overshoots the temperature. Although it is still possible
to stabilize the temperature with proper PID parameters, it is much easier to control if you
limit the maximum output to 25%. Ideally, an optimized temperature control system
should consume about 25% of the heater power at set temperature (steady state), for
example, if you found out that only 50 watts of energy is needed to maintain the
temperature at 60 °C (141 °F), ideally you should use only a 200 watts heater for the job.
Too much power will make the system over react too quickly. Too little power will make
the system too slow in response. By using the OUT parameter, you can make a 1400
watts heater to act as a 200 watt heater for stable temperature control.
2) When the cooker consumes more power than controller can handle, for example, if you
have a 12A, 120V AC heater and your cooker contains more than 38 liter (10 gallon) of
water. It might take more than 90 minutes of full power heating for controller to heat up
the pot. Long time of full power operation might cause the controller overheating. You can
set the output to 80%. It will prevent overheating the controller from staying a full power
for a long time.
• C-F: Temperature unit setting. You can set the display to either Celsius or Fahrenheit.
• Mod: Mode selection setting. Three control modes are available: PID (PID mode for
heating); Cool (on/off mode for cooling), and Heat (on/off mode for heating).
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