Could not find a download for instructions on this watch, but I did manage to find some basic instructions for the Sector brand. I hope this helps as this is the best I can come up with.
Sector Chronograph Watch Instructions
Most chronograph watches have screw-down crowns for water resistance. You must unscrew the watch crown before you can make any changes to the watch time. After time is set screw the crown back in. To utilize the chronograph dials, use the buttons on the side of the watch. One button will be for the second timer. Press once for the second hand to start timing. Press again to stop it. Another button will be to reset the second hand timer back to zero. Sector Chronograph watches may have different dial functions (see link in References).
Sector Dual-Time Watch Instructions
Because Sector watches are known for their sports capabilities, the Dual-Time watches have screw-down crowns. For Dual-Time timepieces, unscrew the crown counterclockwise. Pull the crown to middle position to set the date. Pull the crown out to its fully extended position and rotate it to set the day of the week, hour and time. Press and hold in the crown and turn clockwise to seal the crown back in to the watch.
Sector Ana-Digi Watch Instructions
Sector Ana-Digi timepieces have analog hands plus digital timekeeping functionality. To set the time, unscrew the crown counterclockwise and then clockwise to the appropriate time. The digital functionalities are programmed by the buttons on the side of the case. Depending on the style of the Sector watch, you can set the digital time with one button, set the date display, 1/100 seconds chronograph timer, altimeter, thermometer and alarm functions.