Otii Arc Pro

Otii hardware frequently asked questions

What is the difference between Otii Arc Pro and Otii Ace Pro?

The difference between the Otii Arc Pro and Otii Ace Pro hardware is for example in the power supply and sampling rate. Otii Arc Pro goes up to 5 V and has a sampling rate of 4ksps and goes Otii Ace Pro up to 25 V and has a sampling rate of 50 ksps.

Here is the detailed hardware comparison between Otii Arc Pro and Otii Ace Pro.

What is included when I purchase Otii Arc Pro?

In the package, you will receive Otii Arc Pro and a USB micro-B cable. Otii Arc Pro is used with feature-packed, multi-platform Otii software.

Check the "What's included" page for further details.

How can I request customized plan for my team?

If you are looking for a customized plan for your team’s and company’s needs, please contact our Sales team directly. We will be more than happy to respond to your request and help you achieve your project or business goal with our most suitable tools.

How do I choose the right external DC adapter for Otii Arc Pro?

If you choose to run with an external DC adapter, we recommend you to pick one from an established supplier. The adapter should be low noise, approved for IEC 60950-1 as a Limited Power Source.

The output from the DC adapter can be in the range 7-9V. We recommend 9V in case you have a voltage drop in the supply cables. Pick an adapter that is able to provide a little more than the output current you will need. Be aware that the voltage drop in most cables at 5A is not negligible.

Otii Arc voltage output range: 0-4.2V, 0-200mA In most cases, the power supplied by your computer’s USB Host will be sufficient. However, not all computer USB Hosts are created equal, and if you experience problems you might need an external power supply, see the next section. Hint: By enabling ”meters” (Device => Meters) you can see the actual voltage of your Otii. VBUS is the USB voltage. If this goes below 4.75V, you should switch to an external DC adapter. The input voltage from the external DC connector is also monitored (VDC) and this should not go below 7V.

Otii Arc voltage output range: 0-5V, 0-2A continuous current For this you should use an external AC/DC adapter. There are many good ones available, and we recommend you pick a certified one of good quality with sufficient power rating and 7-9VDC output. XP Power VER18US090-JA, providing up to 2A, and available through Digikey.com, has received good feedback.

Otii Arc voltage output range: 0-5V, 0-2.5A continuous current, 5A peak current Again, use an external power supply. However, many AC/DC adapters with a rating above 2A have been found to be quite noisy, so you should be careful about the quality when looking for good measurements and working in these ranges. We recommend you use a good certified lab power supply. Make sure your lab supply can handle the maximum peak current your device possibly can surge. Be aware of the + and – signs for the DC input.

How does Otii Arc Pro handle short pulses since sampling rate is 4ksps?

Check out our blog post and a short video showing how Otii Arc Pro measures short pulses.

Didn’t find what you were looking for? Check out Qoitech Support page.