Open up your device's Wi-Fi settings and join the network named "TimewiseNNNN", where NNNN is the serial number of your clock.
Your phone may warn you that the selected network has no Internet. That condition is fine, since you are connecting directly to the clock. If prompted, select "remain connected".
Return to this page in your web browser.
Press the "Next" link below.
Follow this link in your device's web browser to access the clock: http://192.168.4.1