PicoScope 7 Software
Available on Windows, Mac and Linux
PicoScope 7 Software
Available on Windows, Mac and Linux
OEM & custom applications
PicoScope, Pico data logger and RF products can be used as components in custom applications and OEM projects.
A to Z of PC oscilloscopes
Everything you need to know about PC oscilloscopes from Advanced Triggers to Zooming.
A to Z of Data Loggers
Everything you need to know about PC-based data loggers from Alarms to Zooming.
Application Notes
Details of some of the many applications for Pico data logger and oscilloscope products.
How do I measure...?
Find out how you can measure using Pico products
Videos
Showing you how to get the most out of PicoScope oscilloscope software.
Documentation
Up-to-date versions of the documentation supplied with your products in PDF format.
Educational Experiments
Our library of science experiments suitable for use with oscilloscope and data logging products.
PicoApps
Want to share hints, tips and code with other developers? Show your Pico-based products to the world.
Newsletter
Archive of our monthly Test and Measurement Newsletters.
Post by sjhagan »
Post by markspencer »
Post by houz9 »
sjhagan wrote:I am using a thermistor in a wheatstone bridge circuit to measure temperature. I am measruing the voltage across the bridge and then using this value to calculate the resistance of the thermistor and then the temperature.
All the fixed resistors are 10k and the thermistor is 10k (at 25C). When I measure the voltage across the bridge using a multimeter it gives one reading. However, when I use the connect the ADC-40 probem, the voltage drops by approx 0.2V. Obviously the voltage reading is incorrect and subsequently the temperature ends up being wrong.
I am guessing this problem has something to do with the input impedance of the ADC-40 probe (approx 1M?). Is there any way of using the ADC-40 probe to measure the correct voltage (and subsequently temperature) using this circuit (perahps by modifying the circuit or by taking the resistance of the probe into account in the calculation?). Any help would be most appreciated.
Many thanks,
Simon
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