Connecting Differential Measurements
- Updated2022-09-20
- 2 minute(s) read
Connecting Differential Measurements
You can use a differential measurement configuration to attain more accurate measurements and less noise. A differential measurement configuration requires two inputs for each measurement, thus reducing the number of available channels on the TS-15100 to 16. The following table shows the signal pairs that are valid for differential connection configurations with the TS-15100.
Channel | AI + | AI- |
---|---|---|
0 | AI 0 | AI 8 |
1 | AI 1 | AI 9 |
2 | AI 2 | AI 10 |
3 | AI 3 | AI 11 |
4 | AI 4 | AI 12 |
5 | AI 5 | AI 13 |
6 | AI 6 | AI 14 |
7 | AI 7 | AI 15 |
16 | AI 16 | AI 24 |
17 | AI 17 | AI 25 |
18 | AI 18 | AI 26 |
19 | AI 19 | AI 27 |
20 | AI 20 | AI 28 |
21 | AI 21 | AI 29 |
22 | AI 22 | AI 30 |
23 | AI 23 | AI 31 |
For an illustration of connecting a device to the TS-15100 using differential connections, refer to the following figures.
To connect floating differential signals to the TS-15100, you must connect the negative signal to COM through a 1 MΩ resistor to keep the voltage within the maximum working voltage. If the voltage source is outside the maximum working voltage, the TS-15100 does not read data accurately.
In a differential configuration, the TS-15100 rejects the common-mode noise voltage during the measurement of V1. To connect grounded differential signals to the TS-15100, you must also connect the signal reference to COM.