Home-automation HOME AUTOMATION User Manual download pdf (Page 83)

Latitude, Longitude, and Time Zone

The system automatically calculates the time of sunrise and sunset each day. Sunrise/sunset can be specified as the time a

scheduling command is executed, as an enable/disable time, or as a darkness condition on a scheduling command or event button.

To enable the system to properly calculate sunrise and sunset times, you must enter your latitude, location north or south of the

equator, longitude, location east or west of the Prime Meridian, and time zone.

These items should be set to the proper values for the location where the Omni IIe is installed. The latitude and longitude for a

particular location may be obtained from an almanac or map of the area. These values should be entered to the nearest degree.

The value entered for the time zone is the number of hours difference between local standard time at the Omni IIe location and

Greenwich Mean Time. The following values should be used for the standard time zones in North America:

ZONE

NAME

4 ATLANTIC

5 EASTERN

6 CENTRAL

7 MOUNTAIN

8 PACIFIC

9 YUKON

10 ALASKA-HAWAII

11 BERING

The value specified for longitude may be adjusted to correct for areas, such as Nova Scotia, where the local time differs from

Greenwich Mean Time by a non-hourly amount. The calculated time of sunrise/sunset will change by four minutes for every

degree change in longitude. To cause the calculated sunrise/sunset to occur later, enter a larger value for longitude. Enter a

smaller value for longitude to cause the time to occur earlier.

It is not necessary to alter the time zone to compensate for daylight savings time, the Omni IIe will automatically adjust its

calculations for sunrise and sunset, and time when daylight savings time begins and ends.

LATITUDE: 30

0-60 

LATITUDE N/S: 1

1=NORTH 2=SOUTH 

LONGITUDE: 90

0-180 

LONGITUDE E/W: 2

1=EAST 2=WEST 

TIME ZONE: 6

0-12

↑

Daylight Savings

The Omni IIe automatically calculates the day of daylight savings time each year. It also adjusts the "time of day" each time

daylight savings time begins and ends.

To enable the system to properly calculate daylight savings time, a start month, start weekend, end month, and end weekend is

set-up at the factory. You may change or disable this function if desired.

DST START MONTH: 4

1-12 0=DISABLE 

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Home-automation HOME AUTOMATION User Manual Page 83

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