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Monitoring the set point within a climatic chamber

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  • Monitoring the set point within a climatic chamber

    Dear all

    Cabinets are customized and controller is Jumo Detron 316. Please find the details enclosed.

    Kindly let me know what we need, thank you. Here the details once more:

    3 rooms; 10 + 15 + 15 climate chambers, totally 45 measuring points of temperature and humidity (climate chambers).

    Process description:

    They need to dry products and they do it in a bit complicate 3-phase process (Batch xxx goes Room 1/Chamber1 etc, then Room 2, Chamber 1 and then Room 3 Chamber 1, etc.). Products are always in batches and they need alarms if drying process is not going as planned as well as batch documentation of each phase as well as total process documentation for each batch of products.

    Alarm limit profile is the thing they need as well as tailored user dash boards and logger displays in the rooms (loggers in chambers, displays), pc in each room and one for main admin user.

    Room 1
    Temperature is between 33…37°C
    Room humidity is 15-20%
    Humidity in the chamber should stay under 10% but first 8h it goes up (around 40%) so there should be a delay of 8h.

    Room 2
    Temperature is 19…33°C
    Conditions +20°C, 10%
    Process takes 5 days

    Room 3
    At the end product should achieve 5%, 29…33°C

    The problem is that alarm curve is not the same in every step of the process. Do you have similar cases like this and is there a possibility to have process based alarm curve profiles to RMS?

    Attached Files

  • #2
    The dTron uses a custom protocol which is a shame but it does have the option of supplying analogue outputs that can be set as the set point value.

    Click image for larger version  Name:	What to order.JPG Views:	0 Size:	118.7 KB ID:	554

    So with RMS we get the set point via an RMS-MADC logger. The real time values would be logged with a standard device.

    We would create an arithmetic measurement point (Set point from the ADC – Real time value), which gives us a measure of the difference between the set point and the real time value.

    Then we simply set an alarm on the difference measurement point with the desired delay for ramp and soak (eg +/- 5 with 15 minute delay). The alarm would be triggered if actual readings are not within +/- 5%rh for the set point with a 15 minute delay to account for the speed of the chamber to control.

    You could also use the logic output to tell RMS when control is on or off and there for switch the alarms on or off within RMS (no alarms when the controller is off :-))

    I think that is what you need?
    Attached Files

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