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on again when T<SV-Hy. e.g. If SV=100 ° C. Hy=3.0 ° C, the heater will heat until

temperature reaches 100.0 ° C. It will be turned on again when temperature drops

below 97.0 ° C. For the cooling mode, the compressor will be turned off when

T=SV. It will be on again when T>SV+Hy.

 CooL. When Cool=0, the controller is set for heating control (reverse action).

When Cool=1, the controller is set for cooling control (direct action).

 Out, Output power percentage. 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 function, you can make the 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 to over heat. You can set the output to 80%. It will prevent the

controller from over heating from staying at full power too long. For details, please

see Appendix 1.

 C-F, Display unit setting. You can set the display either Celsius or Fahrenheit.

 TK, Timer. When TK is set to 1, the timer is on. If you want the controller stays on

without turning of by itself.

This group of parameters is accessed by input code 155. Figure 8 is the flow chart that

shows how they can be changed.