5
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alignment. You may also use two bright stars for
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. An
eyepiece with an illuminated crosshair is highly
recommended.
(2) Use the Hand Controller (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. 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.
For a HEM mount quipped with an iPolar
TM
electronic
polar scope, 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
port and a computer USB port;
Click Connect and start polar alignment by
following on screen instructions.
11.
Manual operation:
The mount can now be used to
observe astronomical objects with the HC. Use arrow
keys (
►
,
◄
,
▼,
and
▲
) to point the telescope to the
desired object. Use the number keys to change the
slewing speed. Press
STOP/0
button to start/stop
tracking.
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 (e.g.,
Solar
System
), then select an object of interest (e.g.,
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
. Follow the on-screen instruction to perform
the sync.
14.
Install hand controller battery:
The hand controller
uses a CR2032 button battery to keep the Real Time
Clock running. The HC is shipped without battery
included/installed due to shipping restrictions. Open
the HC back cover. With the b sign facing up,
slide the battery under two small metal hooks on the
positive side first (circled in red). Then push the
battery down to make a good contact.
15.
Mount control via a computer/SmartPhone/Tablet:
One can control the HEM27 via USB on the 8409 hand
controller or built-in WiFi. It supports ASCOM for
Windows, third party INDI driver for MacOS or
Raspberry PI, iOptron Commander Lite or SkySafari
for iOS/Android. Some software also has iOptron
mount driver embedded.
16.
Put the mount back into the package/carrying case:
It is recommended to return the mount to Zero
Position at the end of the observation session. Lay
the mount into the carrying case. Disengage the gear
system for transportation.
Use
Rev. 2.0 Oct. 2022
