Installation & Operation Manual
4.4 Daylight Savings
Daylight Savings Time (DST) varies greatly from one country to another and sometimes even within countries themselves.
As a result there are many parameters used to handle all of the various rules that are in use throughout the world. The
default setting uses the rule that is observed by the majority of the United States.
NOTE* If any DST settings are changed, the changes will not take effect until the next SNTP Resync Period.
4.4.1 Daylight Savings (DST Options)
The Daylight Saving Time Drop down, allows you to select AUTO, OFF, or CUSTOM. When AUTO is selected the clocks
use the default US Daylight Savings start and stop dates. If OFF is selected the clock does not adjust for Daylight Savings
Time. If CUSTOM is selected the user can specify a custom start date with a start time and stop date with a stop time. The
user can also adjust the bias of the offset.
NOTE* If a US Time Zone is selected then and DST setting of OFF is not allowed. If a DST setting of OFF is needed the
Time Zone should.
4.4.2 Fixed Day
The Fixed Day check box indicates whether or not DST occurs on a specific date. For example, if DST started on March
1st of every year, the Fixed Day box would need to be checked. The Fixed Day box is important in that it changes how the
Start and Stop parameters function. Based on the Fixed Day Check box certain drop down menus will be available for
editing.
4.4.3 Start/Stop Date
The Start and Stop Date parameters indicate when DST changes occur.
• The first drop down is only used on floating day start time (i.e. 2nd Sunday of the month). If fixed day is selected this
option is greyed out.
• The second drop down allows the user to select the day of the week you want DST to start or stop. This parameter is
also only available in a floating day scenario.
• The third drop down allows the user specify the month of the start or stop date. This field is always used.
• The last field is the date, this is only used when a fixed is used (i.e. June 4th).
4.4.4 Hour Bias
The Hour Bias parameter allows the user to input a custom hour and/or minute offset if a CUSTOM Daylight Saving Time
is chosen.
4.5 Clock Type and Date Mode
This section is for utilizing the Calendar feature of the clock. When in Calendar mode the clock will alternate between
displaying the current time for a selected duration, and the current (or offset) date for a selected duration.
4.5.1 Use Calendar
Check this box if the Calendar mode of the clock is desired. If unchecked, the following fields will be greyed out and the
clock will operate as a precision digital clock only.
4.5.2 Date Mode
This field is used to select the format in which the date is to be displayed.
4.5.3 Time
This field is used to select the amount of time, in seconds, that the current time is to be displayed on the clock.
4.5.4 Date
This field is used to select the amount of time, in seconds, that the date is to be displayed on the clock.
NOTE* If a constant display of the date is desired, the “Time” field can be set to 0 seconds, and the “Date” field can be set
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