Step 10. Returning The Mount To Zero Position - iOptron iEQ30 Pro Instruction Manual

(5) Use the ◄ or ► key to adjust polar scope dial to ensure that 12 o'clock is at the top. If the polar
scope is equipped with a bubble level indicator, you may use the bubble as the reference.
(6) Use the Hand Controller (MENU => "Alignment" => "Pole Star Position") to display the current
position of Polaris on the LCD screen, as indicated in the left side of the figure below. For example,
on June 22, 2014, 20:19:42 in Boston, US (alt N42º30'32" and long W71º08'50"), 300 min behind
UT (UTC -300 minutes), the Polaris Position is 0h45.8m and 40.4m.
(7) 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 40.4
minutes and an angle of 0h 45.8 minutes, as shown In Figure 21 (b).
Figure 21. Polaris Position shown on HC (a) and where to put on polar scope reticle (b)
NOTE: Thread the polar scope eyepiece all the way in after polar alignment, before put
the Polar Scope Cover back on. Otherwise, the polar scope eyepiece could be stuck
inside the Polar Scope Cover to cause R.A. axis jamming.
NOTE: If you are located in the Southern Hemisphere, Sigma Octantis will be chosen for Polar
Alignment. For example, on May 20, 2010, 20:00:00 in Sydney, Australia (Lat. S33º51'36" and
Long.E151º12'40"), 600 min ahead of UT, the position of Sigma Octantis is located at a radius of 64.4
minutes and an angle of 1hour21.8minutes.
BrightStar Polar Alignment
For those who can't see the pole star, you can use BrightStar Polar Alignment procedure
described in 5.3.6, Polar Iterate Align.

3.2.10. STEP 10. Returning the Mount to Zero Position

Return the mount to the Zero Position after balancing,
i.e. with the CW Shaft pointing to the ground and the telescope
aperture at its highest position, as shown in Error! Reference
source not found.. Press MENU=>Zero Position =>Set Zero
Position to set the mount zero position.
Always set or check the zero position before each use
or after firmware upgrade.
(a)
20
(b)
Figure 22. Zero position