User's Manual

Figure 25. Polar Scope

Figure 26. Connect polar scope LED

To perform the polar alignment:

(1) Level the CEM40 mount and set it to the Zero Position. Make sure the telescope optical axis is

parallel to the polar axis (R.A. axis) of the mount. If using a finder scope, adjust it to be parallel to

the telescope optical axis.

(2) Remove both the Polar Axis Cover and Polar Scope Cover. Thread the polar scope LED to the

Polar Scope. Connect one end of the polar scope power cable to the illumination LED and the

other end to the DC12V output located on DEC Cable Management Panel (Figure 26).

(3) Turn the mount power on.

(4) Adjust the polar scope dial to rotate the 12 o’clock at the top.

(5) Use the Hand Controller (MENU => “Alignment” => “Position of Polaris/SigmaOct”) to display

the current position of Polaris on the LCD screen, as indicated in the left side of the figure below.

For example, June 22, 2014, 20:19:42 in Boston, US (long. W71°08’50” and lat. N42°30’32”, UTC -

300 min,) the Polaris Position is 0h45.8m and 40.4m.

(a) (b)

Figure 27. Polaris Position shown on HC (a) and where to put on polar scope reticle (b)

(6) Look through the polar scope to find the Polaris. Use the Azimuth and Latitude Adjustment Knobs

to adjust the mount in both directions and put the Polaris in the same position on the Polar Scope

reticle as indicated on the HC display screen. In this case, Polaris will be located at a radius of 41.5

minutes and an angle of 1 hour 26.8 minutes, as shown In Figure 27 (b).

NOTE: If you are located in the Southern Hemisphere, Sigma Octantis will be chosen for Polar

Alignment.