Operation near ambient
For best results, to calibrate at a setpoint near ambient when cooling down from a higher temperature set
parameter (AL-1) 3
°
C higher than you room ambient. When heating up from a lower temperature set (AL-1) 3
°
C
lower than ambient. Access the AL-1 parameter by pressing the mode button (2
nd
from the left). Do not change
AL-2 which should be set at 1.0
Factory default control parameters
The parameters used in the controller have been developed by Accurate Thermal Systems to give the best unit
performance for most applications. If the need arises the “AT” autotune command can be run to further optimize
results based on the thermal block load and ambient conditions. Contact us for further support and details.
Switching the display from Degrees C to Degrees F and vice versa
To switch the display press and hold down the left key until the display indicates “CN-t”, next press the 2
nd
key
from the left one time and the top line will show “d-U” which is display units. Switch to either C or F. After setting
this value hold down the left most key so the controller resets and accepts the new value.
Next press the first button on the left and then the 2
nd
button from the left until the top line displays CN5.
Set CN5 to ____ for degrees F operation and ____ for degrees C. Unit S/N: _____________
When done press the button on the left one time.
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