Omron H3DS Manual page 27

Operation
■ Basic Operation
Setting of Selector
The selectors can be turned clockwise and counterclockwise to
select the desired time scale, or operating mode.
Each selector has a snap mechanism that secures the selector at a
given position. Set the selector at a position at which it is secured. Do
not set it midway between two securing positions or a malfunction
could result from improper setting.
Selection of Time Unit and Time Scale
The star-delta transfer time and star operation time scale are set with
the same selector. The star-delta transfer time can be set to 0.05,
0.1, 0.5, or 1. The star operation time scale can be set to a multiplica-
tion factor of 1 or 10. If the star-delta transfer time is displayed in the
display window in white letters, this means that the star operation
time scale is "x10". Refer to the example below.
Star-delta transfer time
0.05 s
0.1 s
0.5 s
1 s
0.05 s
0.1 s
0.5 s
1 s
Star-delta transfer time and
star operation time scale
display window and selector
■ Timing Charts
Power (A and A )
1 2
Star contact
17 and 18
(star indicator)
Delta contact
27 and 28
(delta indicator)
Note: The reset time requires a maximum of 0.5 s.
Star operation time scale
x1
x10
ON
OFF
t t
1 2
ON
OFF
ON
OFF
t : Star operation time setting
1
t : Star-delta transfer time
2
Time Setting
The star operation time of the Timer is set with the time setting dial.
Locking/Unlocking of Selectors and
Time Setting Dial
The time setting dial and time scale selector can be locked using the
Y92S-38 Lock Key, a special pen type tool that is sold separately. To
lock the dial or selectors, insert the Lock Key in the keyhole to the
lower right of the dial or selector and turn it clockwise until the dial or
selector is completely covered with the red cover. To unlock, turn the
Lock Key in the opposite direction.
0.5 s
Solid-state Star-delta Timer
Key hole
H3DS-G
B-35