Pedro Posted August 17, 2010 Report Share Posted August 17, 2010 Hi all, I've been using a Jazz PT15 with 3 PT1000 sensors connected (measuring hot water at a boiler room) very well. I recently installed another PT15 in another room but this time the measurements are very unstable: temp shows correctly (40ÂºC for example) but jumps every few seconds to 36ÂºC or 45ÂºC...a huge gap! I tried the "high" filter, but inputs keep fluctuating a lot. I tested the sensors with another application and they are ok. PLC is grounded. The only issue is that sensors cables run very near other 220V cables May those cables produce noise to the sensors? (I have done that before without any trouble, though). Am I forgetting something / doing something wrong regarding PLC connections? Any help will be highly appreciated!! thanks in advance Pedro Quote Link to comment Share on other sites More sharing options...
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