Program mode uses Constant mode humidity

[Jeremy Diamond]

On a Watlow F4T(BTX-475) chamber with product temperature control programs use the current constant mode humidity

Here is an image of the program in slot 1 (notice it uses 50% humidity for step 2)

Here is an image of the program 1 running step 2 (notice it uses 10% humidity matching the Constant mode)

[Myles Metzler]

This actually has to do with how the F4T operates and how the ChamberConnectLibrary it, I've opened an issue on there to resolve look into resolving this.

The reason you are seeing this is that humidity control is never actually turned on with this program, and the F4T does not set the set point of its control loops in a program until that loop actually starts controlling:

1. Step 1; humidity is forced off when the temperature process value is not within 0-100C.
2. Step 2; humidity is forced off until the temperature is within 5C of set point, this step is to short for that to happen (per the BTX spec it would take about 20min to make the transition from -5 to 45C).

All of this can be observed from the F4T's disply as well; specifically the humidity CSP parameter. While the F4T's displays humidity TSP parameter will show the correct set point in your case it is actually only telling you what the set point SHOULD be at the end of a the step.

In a normally operating chamber with a program that allows the chamber to reach its desired set points not an issue.

[Myles Metzler]

This issue is actually with ChamberConnectLibrary and not the web controller. An issue has been opened on that repository for this; however defining the correct behavior in this case with how the Watlow F4T operates will be difficult as showing what is actually happening (what is currently being done) is confusing and unexpected, and showing what any reasonable user expects to see will not match what the F4T shows in it's display.

[Jeremy Diamond]

Thank you for the clarification.