AI

The AI (Analog Input) panel allows users to perform analog signal measurements for voltage or current. Through this interface, you can configure acquisition channels, sampling modes, and sampling rates, and view signal waveforms in real-time.

Operation Flow

Please follow the steps below to configure AI signal measurement settings:

1. Select Port

First, confirm your device model and select the corresponding port (Port) and channel.

Product Name	Port	Measurement Type
Ethan-A	0	Voltage
Ethan-A2	0	Voltage
Ethan-I	0	Current
Ethan-IA	0, 1	0: Current 1: Voltage
USB-DAQ-F1-AD	0	Voltage
USB-DAQ-F1-AOD	0	Voltage
Wifi-DAQ-E3-A	0	Voltage
Wifi-DAQ-E3-AH	0	Voltage
Wifi-DAQ-F4-A	0	Voltage

2. Channel Selection

Select the range of channels to be enabled from the Channel Selection drop-down menu.

Option	Description
port0/ai 0	Enable only channel 0
port0/ai 0:1	Enable channels 0 to 1 (2 channels in total)
port0/ai 0:3	Enable channels 0 to 3 (4 channels in total)
port0/ai 0:7	Enable channels 0 to 7 (8 channels in total)

3. Select Acquisition Mode (Mode)

Select the appropriate acquisition mode based on your measurement needs:

• On Demand (Single Read): The software sends one command, and the device returns one current value. Suitable for low-speed monitoring that does not require continuous waveforms.
• N Sample (Finite Point Read): Set a fixed number of sampling points, and stop after acquisition is complete.
• Continuous (Continuous Read): Continuously acquire data until the Stop button is pressed. Suitable for long-term signal recording or oscilloscope monitoring.

4. Set Sampling Rate

Set the number of points acquired per second (Samples per second). The maximum sampling rates supported by different devices are as follows:

Product Name	Sampling Rate Description
Ethan-A	20 kS/s (8-channel sync)
Ethan-A2	10 kS/s (8-channel sync)
Ethan-I	Only supports On Demand mode
Ethan-IA	Only supports On Demand mode
Wifi-DAQ-E3-A	10 kS/s (8-channel sync)
Wifi-DAQ-E3-AH	10 kS/s (8-channel sync)
Other USB-DAQ	Please refer to the product datasheet

5. Other Parameter Settings

Adjust the following advanced parameters as needed:

• Number of Sample: The number of points read from the buffer each time (affects chart update frequency).
• Timeout (ms): The timeout for reading data; if no data is read within this time, an error is returned.
• Ignore Timeout Error: If checked, timeout errors will be ignored, and the program will continue to execute.
• Trigger: Set trigger conditions (select None if there are no special requirements).
  • RTC-Absolute: Absolute time trigger.
  • RTC-Relative: Relative time trigger.

6. Start Measurement

After the settings are complete, operate the buttons below to control the measurement:

Button	Function
Start	Start signal acquisition
Stop	Stop signal acquisition