(Note: you can only add or remove a curve in Settings or Service mode. Select Settings in the main panel and give the password.)

If you are adding a curve, you get a list of all values available. The left column shows the image tools used in the analyses. The right column shows the values measured by the tool. Choose a value, click Ok and the value is graphed.  

Right click the mouse over the curve, and you can reset this or all curves, open the settings panel (if you are authorized) or set the history length similar for all curves.

Adjustments of alarm limits and curve values can be done if you are in settings mode (click on Settings in the main menu and give the correct PIN code). Double click the curve name to see the adjustment parameters. You can adjust the curve axes and the alarm limits (alarm limits are here shown in red). The image below gives you an example.

The curves show if measured values are within given limits. This is useful e.g. to check the light conditions. Select the Notify alarm field if alarms are to be notified. Alarm limits are normally defined based on operator experience. There are two independent types of limits: operational and alarm limits. An event in the system log and a quality alarm are the results of an exceeded operational limit. If an alarm limit is exceeded you can make the system stop if the option for this is chosen (see Service-General).

Supervise only the parameters that operator experience finds useful and give them realistic limits. You may loose overview, control and trust in the system if the number of supervised parameters and generated alarms are too large.