User's Manual

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 determined by your latitude coordinate, with one exception. If

your are near the equator (within +/- 10°), you can choose your own N/S setting.

If the polar axis is aligned to the North Celestial Pole, then set the mount to Northern Hemisphere. If the

polar axis is pointing to the South Celestial Pole, set the mount to Southern Hemisphere. Press the ◄

or ► key to move the cursor and use the ▲ or ▼ key to toggle between “Northern Hemisphere” and

“Southern Hemisphere”.

The time and site information will be stored inside the hand controller’s memory chip. If you are not

traveling to another observation site, they do not need to be changed.

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 required. The battery is a 3V, CR1220 button battery.

STEP 11. 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 12. Perform Polar Alignment

Polar Alignment with iPolar Electronic Polar Scope

CEM40 & CEM40EC are equipped with an iPolar

electronic polar scope. To perform polar alignment,

please refer to Appendix C. It is simple and fast, even the pole star or part of the sky is blocked. Steps

are briefly outlined below:

 Download and install iPolar Software (first time use)

 Connect a USB cable between the iPolar port on the mount and a computer USB port

 Calibrate the iPolar Rotation Center (first time use)

 Start polar alignment by following on screen instructions

Quick Polar Alignment

If the mount equipped with a AccuAlign

optical polar scope, you can use ths Quick Polar Alignment

procedure to perform the polar alignment. One of the CEM40’s unique features is that the polar scope

can be used at anytime as it is not blocked by DEC axle as is the case in a German Equatorial Mount.

This makes it possible to adjust the polar alignment while the mount is tracking.

As indicated in Figure 25, the Polar Scope reticle has been divided into 12 hours along the angular

direction with 20-minute tics. There are 6 concentric circles in 2 groups of 3 marked from 36’ to 44’ and

60’ to 70’, respectively. The 36’ to 44’ concentric circles are used for polar alignment in the Northern

Hemisphere using Polaris, while the 60’ to 70’ circles are used for polar alignment in Southern

Hemisphere using Sigma Octantis.