Installation & Operation Manual
separated by a colon (Hours:Min). The default setting is 0 hours and 10 minutes and is the recommended update interval.
3.3.6 Twelve Hour Time
Select 12 or 24 hour time. When the box is checked the TMPC is in 12 hour mode, when the box is unchecked the TMPC
is in 24 hour mode. The default setting is 12 hour mode. In the 12 hour mode of operation AM hours will display a dot in
the upper left corner of the display. PM hours will display a dot in the lower left corner of the display. (In 24 hour mode
there will be no indication of AM or PM)
3.3.7 24-Hour Mode Leading Zero
When checked, and the clock is displaying 24 hour time, a leading zero will be added to times with single digit hours, such
as 00-09 hundred hours.
3.4 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.
3.4.1 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.
3.4.2 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.
3.4.3 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).
3.4.4 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.
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