A sister lab just began operations in pressure and temperature testing, but they were still using old-fashioned chart recorders to log their data. After I showed their lab manager what the ATO Lab was capable of, he requested a mobile digital data acquisition system for his lab. I went to work creating a user-friendly data acquisition system including easy-to-use software and simple hardware connections.
The resulting system can read 8 4-20 mA sensors and 6 thermocouples. In addition to the system itself, I delivered a user guide and electrical schematics.
Here is the system in use on its first test:
The system ended up being used for all their testing, and I built a second unit for them a couple of months later. Here is the feedback I received from the lab manager:
" I spoke with all the guys and they are happy with what they have now. I just need to get you some more equipment to build us at least another 2 carts. Appreciate all the help you have helped us with. Really do appreciate all the efforts."
Features of the system:
- Up to 10 Hz data logging from 8 4-20 mA channels and 6 Type J thermocouples
- Sensor calibration information easily entered and resulting best-fit line is reviewed before committing to system.
- UPS battery backup to ensure power loss does not invalidate test data
- System checks sensor calibration dates before acquiring data
- Sensor data can be saved/loaded from file
- System saves all testing parameters on shutdown and loads last parameters on startup