iOptron CEM40 User Manual

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11. PEC status: Display of “PEC” here Indicates the Periodic Error Correction playback is turned on.
Default is off.
12. Tracking speed: Displays the current tracking rate of the mount.
 SDRL: mount is tracking at sidereal speed;
 Solar: mount is tracking at solar speed;
 Lunar: mount is tracking at lunar speed;
 CSTM: mount is tracking at a custom, user-defined speed.
13. Slew speed: The mount has 9 slew speeds: 1X, 2X, 8X, 16X, 64X, 128X, 256X, 512X, MAX (~4º/sec).
14. Operation Mode: EQ indicates that the mount is operating in an equatorial mode.
2.4.3. Install and Check the Hand Controller Battery
The hand controller has a real time clock (RTC) which should display the correct time every time the
mount is turned on. If the time is incorrect, please check the battery inside the hand controller and replace it
if needed.
The hand controller uses a CR2032 button battery to keep the Real Time Clock running. The HC is
shipped without battery installed due to shipping restrictions. Open the HC back cover using a good size #1
Phillips driver. With battery + sign facing up, slide the battery under two small metal hooks on the positive
side first. Then push the battery down to make a good contact.
Figure 14. Install a CR2032 battery
If the hand controller can’t display the correct date and time, most likely the battery power is low and
needs be replaced.
2.5. Bench Testing the Mount
The counterweight shaft is designed to counter balance the mount’s own weight. It is recommended
that the CW shaft is installed when testing the mount’s function. Slewing the mount without the CW shaft
installed is not recommended.
NEVER operate the mount with only the counterweight or OTA on it. It may damage the mount
drive system.

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