Pec Data Integrity; Park Telescope; Edit User Objects; Enter A New Comet - iOptron CEM40 Instruction Manual

1. Setup the mount with a telescope in autoguiding configuration by connecting a guiding camera via
the mount's Guide Port or using the ASCOM protocol;
2. Select "MENU=>Settings => Set Guiding Rates". Set a guiding speed from 0.10X to 0.90X. The
default setting is 0.50X;
3. Then press the BACK button and select "PEC Option" from the menu. Use the ▲ and ▼ scroll
buttons to display the "Record PEC" option and press ENTER to start recording the periodic error.
4. It takes the worm gear 400 seconds to make one complete revolution. After 400 seconds PEC will
automatically stop recording. The PEC value will be permanently stored inside PEC chip on R.A. motor
drive until a new data are recorded.
5. If you want to re-record the periodic error, select "Record PEC" and repeat the recording
processes again. The previously recorded information will be replaced with the current information.

5.6.3. PEC Data Integrity

This function will check the recorded PEC data integrity.

5.7. Park Telescope

This function parks the scope to one of four preset park positions.

5.8. Edit User Objects

Besides various star lists available in the hand controller, you can add, edit or delete your own user-
defined objects. This is especially useful for newly found comets. You can also add your favorite
observation object into the user object list for easy sky surfing. Up to 60 comets and other user objects can
be stored.

5.8.1. Enter a New Comet

Press "MENU =>Edit User Objects" to set user objects.
User Defined Comet
Other Objects
Select "User Defined Comet" to add/browse/delete the user-defined comet list. Find the orbit
parameters of a comet in the SkyMap format. For example, the C/2012 ISON has an orbit parameter:
No. Name
C/2012 S1 ISON
Select "Add a New Comet" to add a new one:
Add a New Comet
Browse Comets
Delete a Comet
Delete All Comets
The hand controller will display the parameter entry screen:
Year M Day
2013 11 28.7960 0.0125050
q e
1.0000030 345.5088
30
ω Ω
295.7379 61.8570
I H G
6.0 4.0