Checkline DT-311J - Manual (Page 6)

6. INTERNAL SIGNAL OPERATION
When internal signal mode is selected (‘INT’ LED on), flash rate is
adjusted by turning the setting knob (6).
7. EXTERNAL SIGNAL OPERATION
When external signal mode is selected (‘deg’ or ‘rpm’ LED on), flashing
rate is synchronized with the external signal.
Deg Delayed angle Degree
rpm # of revolutions per 1 minute rpm
(1) DIVIDE RATIO SETTING (See 8. FLASH INTERVAL for detail)
Select 1/1 to provide a flash per every 1 rotation.
Select 1/2 to provide a flash per every 2 rotations.
Select 1/3 to provide a flash per every 3 rotations.
Select 1/4 to provide a flash per every 4 rotations.
Select 2/4 to provide two continuously flashes per 4 rotations.
(2) PHASE SHIFT
Turning the Phase shift setting knob clockwise or counterclockwise, ;
the flashing phase will be shifted.
Pressing the zero set button (ZERO) makes the display “0” at any
angle.