TroubleShooting Measuring

i1Pro and iO

i1Pro / iO - Failing calibration, connection or measuring

• i1Pro requires significant power and when used without the iO, can fail calibration and taking measurements when connected to a USB hub (powered or unpowered) or even directly connected to some PCs. Try changing the cable to a shorter one and directly connecting to a known-good USB port on your computer.

• The iO has also had problems with the same type of connection (even though it’s self powered)

iO Measurement Problems

• Make sure you select iO as the instrument type and not i1Pro - sometimes our software can connect to the i1Pro through the iO (which acts as a USB hub) and mislead you into believing you’re properly connected to the iO.

iSis

Note: All iSis models (other than the iSis Net in network mode) have an idiosyncrasy with their power indicator. The iSis must be plugged into a computer’s active USB port before the iSis power light lights green - regardless of whether the iSis power switch is on or off.

This is unlike any other independently-powered USB peripheral we’ve ever encountered and could lead you to believe the iSis or its power supply is faulty. Also, as an extra idiosyncrasy, even though a connected iSis’s power switch is off, and sometimes even when it’s unplugged from power, it can still appear on the USB bus implying it’s powered and turned on. The iSis is a great instrument, but these features? not so much.