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on off Temperature control

Hello Everybody,

I have two heaters to heat two objects and i want to control the temperatures
of these two objects, i have also two sensors to be able to take the actuall value of the temperature                                                                                                                                    of the two objects  and compare it with the required value.
in case of the actuall value exceeds the required value the two heaters should be  switched off

note: the two objekts should be heated at the same time.

also it should be able to change the required value on the frontpanel of the labview and also to see the actuall value on the front panel

i have labview version 7.1
the hardware is NI PXI 2565 ( general purpose relay switch )
and NI PXI 4351 Temperature/ voltage

i read alot about this item from NI webside and i found that all of them talked about PID controller                                                                                                                                         but i don't think that is  the right solution in my case because i don't make continous control  on the signal but it just switch on and after that off   

could you please help me with your advise how can i make this code

best regards
Satriany
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hello satriany,

basically the best way to implement this would be, that you take a whileloop, where you continuously acquire the temperature from your sensors.
after reading the temperature you compare the acquired value with the limits, you set and then you could switch the heaters off or not dependent on if the temperature is high enough or not.

kind regards,

robert h
NI germany
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