Measuring temperature with ADC-20 & LM35

chriscatford · Post by **chriscatford** » Sat Aug 16, 2008 3:43 pm

I'm having trouble working out how to measure temperature using an ADC-20 with the terminal board and an LM35 sensor.

I've got the three LM35 pins connected directly to the 2.5V, channel 7 and AG connectors, but this isn't working.

I'm a novice, so any advice would be very gratefully received.
Thanks, Chris

gruntman · Post by **gruntman** » Mon Sep 08, 2008 4:20 pm

Chris,

The LM35 reqiures a voltage supply of 4 to 30 volts. As the ADC-20 only operates at 2.5V you will need an external power supply to use it with the ADC-20.

Regards,

Richard Boyd
Crag Technologies, Inc
http://www.pc-oscilloscopes.com

olepagh · Post by **olepagh** » Sun Sep 14, 2008 6:11 am

gruntman wrote:Chris,

The LM35 reqiures a voltage supply of 4 to 30 volts. As the ADC-20 only operates at 2.5V you will need an external power supply to use it with the ADC-20.

Regards,

Richard Boyd
Crag Technologies, Inc
http://www.pc-oscilloscopes.com

That is a strange answer, as according to the specifications the ADC-20 and ADC-24 supply output at Â¨+ and -5V. The 2.5 V output is a reference output (+/- 2.5 mV)

/regards Ole
Denmark