The site information is 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
There is a real time clock in hand controller. If hand controller lost its date and time, please check
the battery.
STEP 9. Perform polar alignment
BrightStar Polar Alignment
If you mount does not have an iPolar installed, or the pole star is not in sight, you may use two bright
stars with Polar Iterate Align to perform a coarse polar alignment.
(1) Level the mount and set it to the Zero Position. Align the telescope to the R.A. axis of the mount.
If a finder scope is used, adjust it to be parallel to the telescope optical axis.
(2) Use the HC (MENU => “Alignment” => “Polar Iterate Align”) to display the azimuth and altitude
position of several bright stars near the meridian. Select one that is visible at a high altitude as
Alignment Star A. Follow the HC instruction to move Alignment Star A to the center of the
eyepiece using a combination of the Latitude Adjustment Knob and the “◄” or “►” buttons.
Press ENTER to confirm when the star is centered. Next, select a bright star that is close to the
horizon as Alignment Star B. Center it using the Azimuth Adjustment Knob and the “◄” or “►”
button (the “▲” and “▼” buttons are not used here). Press ENTER to confirm the settings.
(3) The telescope will now slew back to Alignment Star A. Repeat the steps above. The iteration can
be stopped when it is determined that the alignment error has been minimized. Press the BACK
button to exit the alignment procedure.
NOTE: It is highly recommended to use an eyepiece with an illuminated crosshair for accurate centering.
NOTE: The movement of the alignment star in your eyepiece may not be perpendicular depending on its
location in the sky.
iPolar Polar Alignment
For a HEM27 with an iPolar, refer to iPolar Operation Manual from iOptron’s website to perform the
polar alignment, or steps briefly outlined below:
Download and install iPolar Software (first time use);
Connect a miniUSB cable between the iPolar and a computer USB port;
Click Connect and start polar alignment by following on screen instructions.
Figure 20. USB port on an iPolar electronic polar scope
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