iOptron CEM40 Instruction Manual page 21

All the time zones in North America are "UTC –", as shown in the following table, so ensure the
display shows "UTC -" instead of "UTC +".
Time Zone
Hour behind UT
Enter UTC
To adjust minutes, move the cursor to each digit and use the number keys to input the number
directly. Use ▲ or ▼ key to toggle between "+" and "-". When the time one information entered is correct,
press ENTER and go back to the previous screen. Note that fractional time zones can be entered.
Do not manually add or subtract an hour from displayed time to reflect Daylight Saving Time
(DST). Only select "Y" after DST begins.
For other parts of the world you can find your "time zone" information from internet.
Set Observation Site Coordinates
The fifth and sixth lines display the longitude and latitude coordinates, respectively. The longitude
and latitude coordinates will be automatically updated when the GPS picks up a satellite signal. "W/E"
means Western/Eastern Hemisphere; "N/S" means Northern/Southern Hemisphere; "d" means degree; "m"
means minute; and "s" means second.
If, for any reason, your GPS does not pick up the satellite signal, you can manually enter your
longitude and latitude coordinates. Press the ◄ or ► key to move the cursor, use the ▲ or ▼ key to toggle
between "W" and "E", and "N" and "S", and use the number keys to change the numbers. It is always a good
idea to do your homework and get longitude and latitude coordinates before traveling to a new observation
site.
The site coordinates information can be found from your smart phone, GPS receiver or via the
internet. Site information in decimal format can be converted into d:m:s format by multiplying the decimal
numbers by 60. For example, N47.53 can be changed to N47º31'48": 47.53º = 47º +0.53º,
0.53º=0.53x60'=31.8', 0.8'=0.8x60"=48". Therefore, 47.53º=47º31'48" or 47d31m48s.
Select N/S Hemisphere
The Northern/Southern Hemisphere will be selected automatically when the latitude is set, unless
the latitude is near the equator. When the latitude is between -10° ~ +10°, set it to Northern Hemisphere if
the polar axis is pointing to Northern, or Southern Hemisphere if the polar axis is pointing to South.
STEP 10. Set the Zero Position
Zero Position is the mount starting reference point which ensures the GOTO performance. Press
MENU => "Zero Position" => "Search Zero Position" to let the mount search the Zero Position. Follow the
instruction on hand controller display to adjust the Zero Position if RA or DEC is not aligned. Or press
MENU => "Zero Position" => "Set Zero Position", to manually set the mount to Zero Position. Loosen the
DEC and R.A. Gear Switches in turn to adjust the mount to the Zero Position. Engage the clutches after
each adjustment.
STEP 11. Perform Polar Alignment
Polar Alignment with iPolar Electronic Polar Scope
CEM40 are equipped with an iPolar
the rear end of the mount RA axis to connect the iPolar to a computer.
To perform polar alignment, please refer to online iPolar Operation Menu. It is simple and fast.
Steps are briefly outlined below:
Hawaii Alaska Pacific
-10 -9
-600 -540
TM
electronic polar scope. Plug a USB cable into the USB port on
21
Mountain Central
-8 -7
-480 -420
Eastern
-6 -5
-360 -300