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Density Failure Modes on the Original Floboss S600

Good morning. 

I've been trying to figure out how the S600 handles density failure modes.

Considering there is two densitometer and the first one fails due to a low period. 

Can the user select the densitometer in-use?
Thanks,
- Yasin 

4 Replies

  • Hi ,

    I was able to contact one of our experts on the issue. They explained that when two [densitometers] are in use at the station, then we automatically check and compare density A and B - if either fail, they generate an alarm.

    You should have a display to choose which densitometer you wish to use. You can also write a logicalc to do this selection of required if you have the protools.

    The expert wanted to put emphasis that it's important to consult the manual which can be found on the website and is also built into the help file on the software.

    Here is a direct copy of that help file, from our expert, for your convenience:

    Density

    The system supports single of twin densitometer.

    A densitometer fail frequency is included in the system and if a densitometer falls below this frequency it is deemed to have failed and the corresponding density value is set to zero. This prevents negative densities arising from very low frequency inputs.

    Currently there is no densitometer fail upper limit. Any frequency is considered OK. In practice the hardware will be the limiting factor.

    On detection of a densitometer failure an alarm is raised:

    • FAIL A – Dens A has failed.
    • FAIL B – Dens B has failed.

    Note these alarms are suppressed in maintenance mode and below low flow cut off.

    A densitometer check period may be entered for test purposes. This is only possible in maintenance mode.

    Densitometer failure handling
    • If you select KEYPAD, density stays in KEYPAD mode.
    • If you select DENS A:

    • If transducer A is OK, DENS A remains selected.
    • If transducer A fails, DENS B automatically selected

    Please let us know if you have any more questions,

    Chelsea McGovern

    Web Content Specialist & EE365 Community Support Admin

  • In reply to Chelsea McGovern:

    Chelsea,
    Thank you so much for your answer. It is concise and to the point.
    Supportnet gave me the short version.

    Since then I've followed your instructions and found everything to be in order.
    HOWEVER, I've come to find out that the reason I didn't see density handling in the first place is that the original configuration , programmed in 2009, had only one densitometer.
    This year, they got new dual Emerson CDM100P densitometers onsite.
    When I added the second Densitometer, the density modes DENS A, DENS B, AVERAGE didn't show up, rather it remains at KEYPAD & DENSITOMETER.
    I am not allowed to create a new configuration for my S600's onsite since I'm not the initial author.

    As a means to circumvent this, I've edited Mode_text_tables using configsys and manually added DENS A, DENS B, AVERAGE and set the enable bit to 1. My test bench is offshore in Iraq, so I haven't been able to test it to check if it will work.

    Could you please consult your in-house specialists to verify if what I have proposed will work.

    Thanks,
    - Yasin

    PS; May I please have a copy of the users manual for this version of config600 (2.6 ~ 2.7). I couldn't find it on the Emerson website or supportnet.
  • In reply to Yasin Najib:

    The manual for the old CPU
    hardware
    www.documentation.emersonprocess.com/.../d301150x412~c.pdf


    software

    www.emerson.com/.../config-600-software-user-manual-en-132292.pdf

    you cannot modify the mode text tables without the S600 pro tools. there was little support for the CDM on the old style CPU and no updates are been made to this platform as it has been obsolete for over five years.

    all updates are to the S600+ platform which fully supports the CDM
  • In reply to ian firth:

    Ian,
    As always, thank you for your help.
    Based on your answer, I have proposed a training program and an upgrade to the S600+ on the offshore platform.
    Have a great day ahead.
    - Yasin