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4 | ENGLISH
FCC NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Ring construction Aluminum black anodized
Power jack 12V DC input, 5.5mm outer diameter / 2.1mm inner diameter
barrel connector, tip positive
Power jack
extension cable
6” long, 12V DC, 5.5mm/2.1mm barrel connector on one end,
male RCA connector on other end, tip positive, only needed for
use with optional dew heater controllers
Thermistor jack 2.5mm audio jack, compatible with Smart DewHeater Controllers
for most effi cient power usage
SPECIFICATIONS
celestron.com/pages/warranty
USE WITH DEW SHIELDS
To achieve the highest level of dew prevention, use the heating rings
in conjunction with a dew shield. While not mandatory, a dew shield
will cut down on the amount of power the dew heater ring needs to
use to keep the optics clear of dew. This will result in even better
power effi ciency.
The Celestron Aluminum Dew Shields have a cable management clip
built-in so that they can work seamlessly as a system with the dew
heater rings (Figure 13). If you regularly observe in very heavy dew
conditions, we recommend using both a heater ring and dew shield,
especially with the larger aperture 11” and 14” models.
IMPORTANT NOTE: Be sure to fi rst remove the dew heater ring’s jacks from the integrated
clip in the Aluminum Dew Shield before attempting to remove the dew
shield from the telescope. Otherwise, you can damage the jacks and the
heater ring can become inoperable.
Fig 13
The Celestron Aluminum Dew Shields
are fully compatible with the dew heater
rings, there is an integrated clip built into
the dew shield for the heater ring’s jacks.
2. Attach the cable management clip onto the front cell of the
telescope near the jacks as indicated previously (Figure 12).
Be sure not to pull on the cables too hard when doing this.
3. Connect the heater ring’s power jack to one of the Smart DewHeater
Controllers heater output ports using the included extension cable.
4. Use the thermistor extension cable that comes with the Smart
DewHeater Controllers to connect the heater ring’s thermistor jack
to the corresponding thermistor port located on the controller box
under the heating port that the ring is now connected to.
The dew heater ring is now ready to be used with the Smart
DewHeater Controllers. For more information on powering and
operation of the Smart DewHeater Controllers, refer to the instruction
manual that comes with the controller.
The dew heater rings are also generally compatible with third party
dew heater controllers. Use the included extension cable to connect
the dew heater ring’s power jack to the controller’s heater output port.
NOTE: The dew heater ring’s integrated thermistor is generally NOT compatible with 3rd party
dew heater controllers. To utilize “smart” functionality for most effi cient power usage,
you will need a Celestron Smart DewHeater Controller.
Fig 12
Fig 11
USAGE WITH CELESTRON SMART
DEWHEATER CONTROLLERS
For the most effi cient power usage while keeping your optics free from
dew all night, we highly recommend using the dew heater rings with
the Smart DewHeater Controllers. These controllers utilize the ring’s
built-in thermistor to provide just the right amount of heat to prevent
dew based upon the ambient temperature, ambient humidity, and
temperature of the Schmidt corrector.
To use the dew heater rings with the Smart DewHeater Controllers:
1. Remove both the ring’s power jack and thermistor jack from their
storage clips on the ring and insert them into the cable management
clip (Figure 11).
©2022 Celestron. • Celestron and Symbol are trademarks of Celestron, LLC.
All rights reserved. • Celestron.com • 2835 Columbia Street, Torrance, CA 90503 USA
celestron.com/pages/technical-support
(Products or instructions may change without notice or obligation.)
Designed and intended for those 14 years of age and older.
94050, 94051, 94052,
94053, 94054, 94055
10-22
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