Interesting Graph

[Gary V]

Brian,
Got too much time on my hands so playing with the updated Heatermeter and noticed how the graph and possibly the controls flatten when you go from only looking at the pit probe and then adding 3 product probes. Thought this was interesting. Any ideas or concerns.

 

[Gary V]

I believe i solved my question on the graph. I believe when the products probes where added, the right hand graph scaling changed. The current displayed scale shows a narrower temp range while in reality that range must of changed and got much broader without updating the scaling on the right side. When i look at the current running graph, the right hand scale range has become wider, 40 to 170, and the graph fan and servo resolution became smaller. I have seen this before, but had not idea what caused the display to change while the right hand scaling did not change until I changed set point. Must be those little aliens from Mars.

 

[RalphTrimble]

The HM scale will adjust to show the biggest peaks in the range of the graph, be that a change in setpoint or an odd spike in a probe reading, perhaps there was a spike on a probe when plugging them in that made the scale adjust. If, for instance, you change your setpoint to very near your probe readings in ambient temperature the HM graph scale will eventually change to a very narrow band of just a few degrees.
If you click the Archive link on the bottom of the graph and then hit the reset database link there your graph scale should reset tightly around the current range of your probe readings and setpoint.

 

[Bryan Mayland]

Yup, this is correct. The left scale is always 0-100% (for fan speed, servo openness, and combined PID output). The right hand scale scales to be sure to include any probe data or setpoint in the graph range, even if the probe display is turned off. You can mess with the scale by setting your setpoint to the probes temperatures or very far away from the probes temperatures, or like Ralph said sometimes there is a point that comes when plugging in or unplugging a probe that creates a temperature out of the ordinary. That last thing I try to catch by looking at the slope of the temperature readings and discarding a large outlier, but it isn't perfect.