ZK S900 User's Guide download pdf (Page 167)

S900 User Guide

Scroll with the ▲/▼ keys until RTC Test is highlighted. Then press

OK to accept.

You will notice the Date (YYY-MM-DD) and Time (HH-MM)

appear on the top of the screen.

Beneath the date/time line you will see:

00(s) : 08(ms).

The line above represents seconds(s) and milliseconds (ms).

Press OK once and the seconds and milliseconds advance in

real-time, as does a stop watch.

Each time you press OK, the “stop watch” will reset to zero and

then start again.

If the clock is operating correctly, press ESC at any time to return

to the Auto Test Menu.

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ZK S900 User's Guide Page 167