X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
3
3
-
-
2
2
8
8
R
R
E
E
V
V
E
E
The display and all other time outputs indicate UTC without any DST adjustment if a time-zone offset of
00:00 is selected. Regardless of the time-zone offset there will be no DST adjustment if "Off" is
selected for the DST function. Some local jurisdictions enter and leave DST at times other than those
set by U.S. federal law. Therefore, TrueTime has included a "Manual" choice which allows the user to
override the times of entry into and exit from DST by selecting his own. If "Manual" is selected for the
DST function, the display will show:
Enter dst: 02:00
1st Sun in Apr
or some other entry time and date. Press the right- or left-arrow keys to position the cursor beneath the
character that you wish to change. Press the up- or down-arrow keys to scroll through the possible
choices. Alternatively, directly enter the numbers using the keypad. The cursor will automatically
advance to the next position. The hours may range from 0 to 23. The week may be "1st", "2nd", "3rd",
"4th", or "Last". Any day of the week or month may be selected. The above display means that
Daylight Saving Time will start at 2 a.m. local time on the first Sunday in April each year. DST
transitions may be set to occur at any hour of the day, any day of the week or any month of the year
with the following restriction: If either transition is less than 24 hours from the start or end of a year, the
transition may not occur at the desired time.
When the display shows the desired entry time and date, press "FUNC/ENTR" again, and the display
will show:
Leave dst: 02:00
Last Sun in Oct
or some other entry time and date. Press the right- or left-arrow keys to position the cursor beneath the
character that you wish to change. Press the up- or down-arrow keys to scroll through the possible
choices. Alternatively, directly enter the numbers using the keypad. The cursor will automatically
advance to the next position. When the display shows the desired exit time, press "FUNC/ENTR" to
enter the selections. The data entry may be aborted at any time prior to pressing the last
"FUNC/ENTR" by pressing either the "TIME", "STATUS", or "POSITION" keys.
Once the entry and exit times are entered, they will be retained in nonvolatile memory if the clock loses
power or is turned off. If the nonvolatile memory is corrupted due to battery failure or any other cause,
the entry time will default to 2:00 a.m. on the first Sunday in April and the exit time will default to 2:00
a.m. on the last Sunday of October.
The sequence of the count upon entry into DST is:
01:59:58
01:59:59
03:00:00
03:00:01
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