The positive and negative voltage outputs are relative to a common reference point. First, connect the positive output terminal of CH1 in series with the negative output terminal of CH2. Select the ground as the reference point and connect both CH1 and CH2 grounds to it. Since the positive terminal is connected to ground at 0 V, use a multimeter to measure the voltage from the negative terminal of CH1 to the reference point—it should read approximately -12 V. Similarly, measure the voltage from the positive terminal of CH2 to the reference point—it should read approximately +12 V.

1. UDP4303S can record up to approximately 6 seconds of waveform data locally at a sampling rate of 8 kSa/s. The exact recording duration may vary depending on the data format and internal storage capacity.
The device typically recognizes a USB flash drive within a few seconds after insertion, allowing for immediate data saving or transfer.
2. The recording length when using a USB flash drive depends on both the capacity of the drive and the data format used. Larger-capacity drives enable longer recording times, limited only by the available storage space.
3. Yes, the UDP4303S supports direct saving of recorded waveform data to a connected USB flash drive. This enables easy data transfer and further analysis on external systems.