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Measure negative temperature with logo RTD

Created by: Import-User-1 at: 10/24/2011 11:13 AM (3 Replies)

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10/24/2011 11:13 AM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Import of a Technical Question of an User Guest Hello, I have a problem. I need measure a temperature range from -40°C to 30°C. I have connected a PT1000 to Logo RTD, but the value of input is about 00190 at 16°C, 00000 at 0°C and it remain at 00000 for negative temperatures. I aspect that it became negative,like in the simulation. How can I measure the negative temperature? I have connected the PT1000 between M1- and IC1 and made a shortcut between IC1 and M1+. Can someone help me? Thank you
Import-User-1 Posts: 3609 Rating: (29)
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10/25/2011 6:54 PM	Rate (0)
Oll Bell Posts: 62 Rating: (3)	https://www.automation.siemens.com/tf/WW/en/Posts/64721#top
Oll Bell Posts: 62 Rating: (3)	Last edited by: Oll Bell at: 10/25/2011 6:55 PM
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11/1/2011 11:33 AM	Rate (0)
Maverick_Adani Posts: 3 Rating: (0)	Dear If still you did not get your reading properly i think you should go with this attachment.Hope so it will be useful to you. Attachment Temp.zip (244 Downloads)
Maverick_Adani Posts: 3 Rating: (0)
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11/2/2011 8:52 AM	Rate (0)
stivk Posts: 6 Rating: (2)	Hello I think that you have to get an analog amplifier.In the amplifier you should select senson PT100/PT1000.So you must connect your analog input with the analog amplifier and then you should take the right value. Best regards
stivk Posts: 6 Rating: (2)	Last edited by: stivk at: 11/2/2011 8:53 AM
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