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Temperature sensor weird values.

Created by: Arkhanos at: 10/21/2014 10:16 AM (2 Replies)

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10/21/2014 10:16 AM	Rate (0)
Arkhanos Posts: 2 Rating: (0)	Hello, i need help with a Logo 12/24 rc 0BA6 and a TSA01 temperature ( sensorhttp://www.pishrobot.com/files/products/datasheets/tsa01.pdf). While having a 0,75v -ambient temperature 25ºC- (sensor value) at either AI1 or AI2 (I7/I8) inputs the input ampificator gives me around 23-26, then it go up to 50 aproximately and inmediatedly go down to 0 and then it start to increase back to 23-26. I tried to change amplifier configuration but i get different values but same behaviour (while there is not temperature change at sensor). The sensor is powered by a 4,5v battery (5v to +, Sh to -, T to AI) and if i apply hot or cold on it i get proper voltage values with the multimeter but no behaviour change in amplificator values. The amplificator is configured as a 0..10v. Thanks!
Arkhanos Posts: 2 Rating: (0)	Last edited by: Arkhanos at: 10/21/2014 10:17 AM
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10/21/2014 11:21 AM	Rate (0)
190B Platinum Member Joined: 2/8/2012 Last visit: 12/22/2014 Posts: 2347 Rating: (385)	Do you have a connection between the negative terminal of the battery and the M terminal of the LOGO !? According to the data sheet of MCP9700A are between a temperature of -40 ° C and +125 ° C from a voltage of 2.3 V to 3.95 V. Example, see attached file. Attachment Example TS01.zip (223 Downloads)

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10/22/2014 4:11 PM	Rate (0)
Arkhanos Posts: 2 Rating: (0)	Thanks!It´s working now!.
Arkhanos Posts: 2 Rating: (0)
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