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Pt100 and other

Created by: andrewF at: 12/24/2011 9:17 AM (4 Replies)

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12/24/2011 9:17 AM	Rate (0)
andrewF Posts: 87 Rating: (1)	Hi! Give me please info about then Pt100.... 1) In hardware config I can config Standard and Climatic ??? Why??? 2) In manual I see three table with Stand, Climatic and Stand. with range -260..1100 C ???? IEC narmative IEC 60751 (2008) describe the one range -200C.....+850C......what is Climatic? what is the range -260.....+1100 ???
andrewF Posts: 87 Rating: (1)
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12/24/2011 11:30 AM	Rate (0)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 8/27/2024 Posts: 2957 Rating: (242)	Hello, Check this forum thread /tf/WW/en/Posts/17006 it should help.
	Best regards, Darius
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12/24/2011 11:37 AM	Rate (1)
Marko Bursic Platinum Member Joined: 9/8/2009 Last visit: 7/17/2023 Posts: 1410 Rating: (153)	It depends on range of teperature you need, internal operational amplifier is set to these three ranges. It means that you will have the best accuracy if you choose climatic range, but also the smallest range of temp., if you choose large span of range you get smaller accuracy.

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12/25/2011 2:19 PM	Rate (0)
andrewF Posts: 87 Rating: (1)	Thank for answers...but I not understand this info....in normative described range -200....+850C , what is the 1100C - it not standard range for PT100..... for Klimatic i must understanding this like working in the standard range (-200....+850) with better accuracy in Klimatic range? but what happened if I work with standard Pt100 in Kilmatic range???
andrewF Posts: 87 Rating: (1)
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12/25/2011 6:00 PM	Rate (0)
Marko Bursic Platinum Member Joined: 9/8/2009 Last visit: 7/17/2023 Posts: 1410 Rating: (153)	andrewF Thank for answers...but I not understand this info....in normative described range -200....+850C , what is the 1100C - it not standard range for PT100..... for Klimatic i must understanding this like working in the standard range (-200....+850) with better accuracy in Klimatic range? but what happened if I work with standard Pt100 in Kilmatic range??? At this point I don't understand your question. Pt100 is a temp. variable resistor. You need to feed this resistor with constant current source lets say of 1mA (I don't know exactly the value of siemens ANA module) and you measure voltage on resistor. First you have to subtract bias voltage (voltage at minum temp. range) and then amplify signal (until max temp outputs max signal, if you choose small amplication you can have large range but less precision, and alternatively...). So the range of mesured temp. is purely dependant of bias and gain of operational amplifier, not by pt100 element. However, higher temp. ranges needs pt100 element to also resist higher, to not melt down.

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