iOptron CEM120 7300 User manual

QuickStartGuide 
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CEM120™Center‐BalancedGoToEquatorialMount
Models:#7300,#7301,#7302
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PACKAGECONTENTS1
 1XTelescopemount
 1XHandcontroller(HC)–Go2Nova®#8407
 1XCounterweight(10kg/22lbs)
 1XStainlesssteelcounterweightshaft(4.6kg)
 1XHCcontrollercable
 1XRS232‐RJ9serialcable
 1X12V5AACadapter–100‐240V
 4XBasemountingscrews
 1XGPSexternalantenna
 1XWi‐Fiexternalantenna
 QuickStartGuide(thisdocument)
ONLINERESOURCES(atwww.iOptron.com,under“Support”)
 User’sManual
 Tipsforsetupandusingtheproducts
 Handcontrollerandmountfirmwareupgrades(checkonlineforthelatestversion)
1Thedesignandpackagingmaychangefromtimetotimewithoutnotice.

STOP!!!
Read the Instruction BEFORE setting up and using the mount! Worm/gear system damage due to improperly
use will not be covered by warranty.
Questions? Contact us at [email protected]
Instruction for CEM120 Gear Switch and Axle Locking Knob
Both RA and DEC have the same Gear Switch and Axle Locking Knob, the operations are the same.
Gear Switch Axle Locking Knob
As an example, here are the positions for the Gear Switch and Axle Locking Knob for RA axis:
Fig.1: When transferring or installing the mount, lock the Axle Locking Knob and disengage the Gear
Switch . So the RA won’t swing and there is no force applied onto the worm/ring gear.
Fig.2: During mount balancing process, pull and turn the Axle Locking Knob to release it and leave the
Gear Switch at disengaged position . Now the mount will swing freely in RA direction.
Fig.3: During normal operation of the mount, i.e., GOTO and tracking, turn the Gear Switch to locking position
to engage the worm/ring gear while leave the Axle Locking Knob released
Fig.1 During transferring and
installing…
Fig.2 During balancing…
Fig.3 During operating…
ONLY set the Gear Switch at locking position to engage the worm/ring gear during goto, slew or tracking.
ALWAYS lock the Axle Locking Knob during transferring and installing.
DO NOT lock both Gear Switch and Axle Locking Knob at the same time.

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1. AttachingtheMount:MakesurethattheRAaxleis
atthelockingposition.Removethemountfromthe
package.Putitontoapier/tripodtopandsecureit
withfourincludedBaseMountingScrews.

2. Installing the Counterweight (CW) Shaft:Holdthe
mountheadwithonehand,pulltheRAAxleLocking
Knoboutward,slowlyrotatethemountRA90degree
tolevelposition.ReleasetheRAAxleLockingKnobto
locktheRAaxisagain.

RemovetheCWshaftfromthepackageandthreaded
intotheCWshaftmountinghouse.

3. Setting the Latitude:LoosentheLatitudeLocking
Clampsaboutaquarter(1/4)turnwitha5mmAllen
wrench.
Turn the Latitude Adjustment Knob until the arrow
pointstoyourcurrentlatitudeontheLatitudeScale.
There are fine scales on the Knob, as shown in the
photo.

TightentheLatitudeLockingClampswhendone.
[NOTE:Forthoselowlatitudeplacesbetween0°to
10°, special low latitude CWs (#7326LL) are needed.
Pleasespecifywhenorder.]
4. Installing the Counterweight(s) and Telescope:
Before installing the Counterweight(s), make sure
that mount is at Zero Position, i.e.,CWshaftis
pointing to ground. Both R.A. and DEC Axle Locking
Knobsareatthelockingposition(refertoFigure.1).
Remove the CW Safety Cap at the end of CW Shaft.
GuidetheCWovertheshaft.TightentheCWLocking
ScrewtoholdtheCWinplace.PlacetheSafetyCap
backontotheshaft.
You may need more CW for heavier payload, or
smallersizeCWforlighterscope.

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iOptron Corp. | 6E Gill Street | Woburn, MA 01801 USA | [phone] | www.iOptron.com
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TheCEM120hasaLosmandyDdovetailsaddle,as
shown below. Release the dovetal saddle locking
knobs and slide the telescope dovatal plate into the
saddle.Tightenthesaddlelockingknob.

5. BalancingthePayload:Afterattachingthescopeand
accessories, the mount head assembly must be
balanced in both R.A. and DEC axes to ensure
minimumstressesonthemountdrivingmechanism.
CAUTION:Thetelescopemayswingfreelywhenthe
R.A. or DEC during the balancing process. Always
hold on to the mount and/or telescope assembly
beforereleasingtheAxleLockingKnoband/orGear
Switches to prevent it from swinging, which can
causepersonalinjuryand/orequipmentdamage.
With the corresponding Gear Switch disengaged,
balance in DEC axis by moving the scope with
accessories back and forth in the mount saddle.
BalancetheassemblyinR.A.axisbymovingCWalong
itsshaft.
Onlybalanceoneaxisatatimeandstartwiththe
DECaxisfirst.Doublecheckthemounttomakesure
boththeRAandDECaxesarebalanced.
Return the mount to the Zero Position after
balancing; i.e., the CW Shaft points to ground, and
thetelescopetipisatitshighestposition.
6. ConnectingCables:Plugina12VDCpowersupplyto
theDC12VPOWERsocket.ConnecttheGo2Nova
®
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8407HandControllertotheHBXportonthemount
sidepanel.InstallWi‐Fiantenna(rightangleone)and
GPSantenna.

RefertothefullUser’sManualonhowtousethe
cablemanagementsystem.
7. Performing Polar Alignment:  You may install an
optional electronic polar scope, with an optional
polarscopeadapter,forpolaralignment.Oryoumay
usepolaralignmentsoftwaretodothejob.
You may also use “Polar Iteration Align” in hand
controllerforpolaralignment.
8. Manual Operation: The mount can now be used to
observe astronomical objects with the HC. Unlock
bothRAandDECAxleLockingKnob,andengageboth
RAandDECGearSwitch,asshownnFig.3.Usearrow
keys(►,◄,▼,and▲)topointthetelescopetothe
desired object.  Use the number keys to change the
slewing speed. Press the STOP/0 button to start
tracking.
9. Setting Controller:PresstheMENU button; then
“Settings”=>“SetTime&Site”.

EnterthecurrentdateandcheckforDaylightSaving
Time using arrow and number keys. Enter the time
zoneoffsettotheUTC;forexamples:
 Bostonis“UTC‐300minutes”
 LosAngelesis“UTC‐480minutes”
 Romeis“UTC+060minutes”

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iOptron Corp. | 6E Gill Street | Woburn, MA 01801 USA | [phone] | www.iOptron.com
 Sydneyis“UTC+600minutes”
[TIPS:  All time zones in N. America are “UTC ‐XXX
minutes”.Latitudeandlongitudecoordinatescanbe
obtained from GPS‐equipped devices (navigator,
phone), or from internet.  “W/E” = western/eastern
hemisphere;“N/S”=northern/southernhemisphere;
and “d” = degree; “m” = minute; and “s” = second.
Use arrow and number keys to enter location
information.]
10. SetZeroPosition:SetthemounttoZEROpositionby
pressing MENU=>“Zero Position” => “Set Zero
Position”. Use the hand controller to, or manually
move the mount to zero position, i.e. telescope on
topofthemountadpointingtoNorthPolewithCW
shaftpointingtoground.PresstheENTERtoconfirm.
PerformSetZeroPositionifthemountlostitspower
duringsleworafterfirmwareupgrading.
11. One Star Alignment:PerformaOne Star Alignto
correct the Zero Position discrepancy and improve
theGOTOaccuracy.TofurtherimprovetheGOTO
accuracy, refer to the full User’s Manual for more
details.
12. GotoanObject:ThemountisnowreadyforGOTO
andtrackingtargets.PressMENU,selectandENTER
“Select and Slew”. Select a category (for example,
“SolarSystem”),thenselectanobjectofinterest(for
example, “Moon”).  Press ENTERandthetelescope
will slew to the object and automatically start
tracking.
13. Sync to Target: Iftheobjectisnotinthecenterof
the eyepiece, use this function to center and
synchronize the object to improve local GOTO
accuracy.  Press MENUandselectandENTER“Sync
to Target”.Usearrowkeystocentertheobjectin
eyepiece. Press ENTERagaintocompletethis
function.
[TIP:Afterslewingtoanobject,alistofnearby
bright object(s) can be displayed by pressing “?”
button.]
14. Transferring the mount:Itisrecommendedtopark
your scope at the end of the observing session.
Please refer to online instruction manual for more
information. If you are dismounting and transferring
themount,makesurethatbothRAandDECaxlesare
locked by turning the Axel Locking Knobs to lock
positionandtheGearSwitchesareunlocked.
Use [e-mail] for technical support.

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iOptron Corp. | 6E Gill Street | Woburn, MA 01801 USA | [phone] | www.iOptron.com
IOPTRON TWO YEAR TELESCOPE, MOUNT, AND CONTROLLER WARRANTY
A. iOptron warrants your telescope, mount, or controller to be free from defects in materials and workmanship for two years. iOptron will
repair or replace such product or part which, upon inspection by iOptron, is found to be defective in materials or workmanship. As a
condition to the obligation of iOptron to repair or replace such product, the product must be returned to iOptron together with proof-of-
purchase satisfactory to iOptron.
B. The Proper Return Merchant Authorization Number must be obtained from iOptron in advance of return. Contact iOptron at
1.781.569.0200 or [email protected] to receive the RMA number to be displayed on the outside of your shipping container.
All returns must be accompanied by a written statement stating the name, address, and daytime telephone number of the owner,
together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of
iOptron.
The customer shall be responsible for all costs, such as transportation, insurance and fees, both to and from the factory of iOptron, and
shall be required to prepay such costs.
iOptron shall use reasonable efforts to repair or replace any telescope, mount, or controller covered by this warranty within thirty days of
receipt. In the event repair or replacement shall require more than thirty days, iOptron shall notify the customer accordingly. iOptron
reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and
function.
This warranty shall be void and of no force of effect in the event a covered product has been modified in design or function, or
subjected to abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not
covered by this warranty.
IOPTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A
PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HERE. THE SOLE OBLIGATION OF IOPTRON UNDER THIS LIMITED
WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH
HERE. IOPTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE
ANY IOPTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED
IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE.
Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied
warranty lasts, so the above limitations and exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
iOptron reserves the right to modify or discontinue, without prior notice to you, any model or style telescope.
If warranty problems arise, or if you need assistance in using your telescope, mount, or controller contact:
iOptron Corporation
Customer Service Department
6F Gill Street
Woburn, MA 01801
www.ioptron.com
[email protected]
Tel. [phone]
Fax. [phone]
Monday-Friday 9AM-5PM EST
NOTE: This warranty is valid to U.S.A. and Canadian customers who have purchased this product from an authorized iOptron dealer in
the U.S.A. or Canada or directly from iOptron. Warranty outside the U.S.A. and Canada is valid only to customers who purchased from
an iOptron Distributor or Authorized iOptron Dealer in the specific country. Please contact them for any warranty.