AI

AI (Analog Input) panel provides users with voltage or current analog signal measurement. Through this interface, you can set acquisition channels, sampling mode, and sampling rate, and view signal waveforms in real-time.

Operation Flow

Please follow the steps below to set up AI signal measurement:

1. Port Selection

First confirm your device model, and select the corresponding 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 channel range to enable in the Channel Selection drop-down menu.

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

3. Mode Setting

Select the appropriate acquisition mode according to your measurement needs:

• On Demand: Software sends a command once, and the device returns a single value at that moment. Suitable for low-speed monitoring that does not require continuous waveforms.
• N Sample: Set a fixed number of sampling points, and stop immediately after acquisition is complete.
• Continuous: Continuously acquire data until the Stop button is pressed. Suitable for long-term signal recording or oscilloscope monitoring.

4. Sampling Rate Setting

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 channels synchronous)
Ethan-A2	10 kS/s (8 channels synchronous)
Ethan-I	Supports On Demand mode only
Ethan-IA	Supports On Demand mode only
Wifi-DAQ-E3-A	10 kS/s (8 channels synchronous)
Wifi-DAQ-E3-AH	10 kS/s (8 channels synchronous)
Other USB-DAQ	Please refer to the product specification

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): 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 condition (Select None if there are no special requirements).
  • RTC-Absolute: Absolute time trigger.
  • RTC-Relative: Relative time trigger.

6. Start Measurement

After setting, operate the buttons below to control measurement:

Button	Function
Start	Start signal acquisition
Stop	Stop signal acquisition