30
5000/5100 Series Digital Analog Clocks Installation and Operation Manual
Chapter 2: ADC-5100 Series Analog Digital Clocks
Note
The offset range is only ±6 hours due to the
12-hour representation of 24-hour time. For example, offsets of -8 or
+16 hours can both be represented by a move of +4 hours.
Daylight Saving Time Adjustment (Free Running Clocks)
To advance the time by one hour, press and hold the
CW
button for 10
seconds. Release the
CW
button when the clock hands begin to move
rapidly. The clock will automatically set to the new time.
To revert the time by one hour, press and hold the
CCW
button for 10
seconds. Release the
CCW
button when the block hands begin to move
rapidly. The clock will automatically set to the new time.
Note
When operating from external timecode, daylight saving time is applied
to the master clock, not the ADC.
Second Hand Tracking
If the second hand is not falling on the second marks, the following
calibration procedure should be used while the clock is operating
normally. (Be careful not to enter the Manual Set Mode).
Note
Before moving the seconds hands, place the hands in Step Mode using
DIP switch SW1 (closed position).
•
To advance the second hand clockwise slightly, press and hold the
CW
and
MANUAL SET
buttons together in the following manner:
press and hold the
CW
button first, followed by the
MANUAL SET
button. For every second that the buttons are held, the hands will
move three extra motor points forward. There are 150 motor points
per second; therefore a one second error requires that the
CW
and
-4
8:00:00
-3 1/2
8:30:00
-3
9:00:00
-2 1/2
9:30:00
-2
10:00:00
-1 1/2
10:30:00
-1
11:00:00
-1/2
11:30:00
Table 2-13.
Table 3.1 Local Offset Programming
(Continued)
Offset Desired (hrs) Move Hands To Offset Desired (hrs) Move Hands To
