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.
Hi Yasin Najib , 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
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