iOptron CEM40 User Manual

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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.
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
Year
M
Day
q
e
ω
Ω
I
H
G
C/2012
S1 ISON
2013
11
28.7960
0.0125050
1.0000030
345.5088
295.7379
61.8570
6.0
4.0
Select “Add a New Comet” to add a new one:
The hand controller will display the parameter entry screen:
Add a New Comet
Browse Comets
Delete a Comet
Delete All Comets
User Defined Comet
Other Objects

iOptron CEM40 Specifications

General

Mount	Center-balanced Equatorial Mount (CEM)
Structure Material	All metal, CNC machined
Exterior finish	Anodized red/black
Level indicator	Level bubble
Dovetail saddle	8" Losmandy D & Vixen
Hand Controller	Go2Nova® HC, 212, 000 objects database, star recognition
Cable management	Yes
Tripod	LiteRoc 1.75" Stainless Steel(7kg), optional tri-pier
Max payload*	40 lb (18kg), exclude counterweight
Payload/Mount weight ratio	2.28:1
PEC	PPEC/Real time PEC
Tracking accuracy (PE)**	<±7.5 arcsec p-p (CEM40, CEM40G), or <0.3 arcsec RMS (CEM40EC)
Motor resolution	0.08 arc seconds
Slew speed	1×, 2×, 8×, 16×, 64×, 128×, 256×, 512×, MAX(~4.5°/sec)
Latitude adjustment range	0°~ 60° (special CW shaft mounting if <10° )
Azimuth adjustment range	± 6°
Operation temperature	-10°C ~ +40°C
Right Ascension worm wheel	Φ110mm, 216 teeth aluminum
Declination worm wheel	Φ110mm, 216 teeth aluminum
Counterweight shaft	Φ28X280 mm, Stainless Steel (1.2 kg)
Counterweight	11 lb (5 kg) X1
Motor drive	Precision stepper motor, 1.8º/128X micro-step
Meridian treatment	Stop (0-14° pass), auto flip
Power consumption	0.6A(Tracking), 0.9A(GOTO)
Power requirement	12V DC 5A
AC adapter	100V ~ 240V (included, indoor use only)
Polar Scope	Internal iPolarTM electronic polar scope
GPS	Yes
WIFI	External (optional)
Guiding scope/camera	Built in guiding scope and camera, iGuiderTM (CEM40G)
Autoguide port	ST-4
Communication port	USB Port (on mount)
PC computer control	Yes (ASCOM)
Warranty	Two year limited

Weight and Dimensions

Mount weight	17.4 lb (7.9kg)
Mount base size	Φ120 mm