Celestron 94050 Setup Manual - Halaman 3

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Fig 7

Alternately tighten the screws using a cross pattern as shown.

8. Remove the paper installation shield. Installation is now complete.

When the dew heater ring is not in use, the power jack and

thermistor jack stay clipped to their plastic storage clips which are

connected to the ring itself (Figure 8). When in their storage clips,

the telescope's dust cover can be placed on the front of the tube

without interference from the jacks.

Fig 8

Power Jack Storage Clip

STAND ALONE OPERATION

The simplest way to use the dew heater ring is to connect a 12V

DC power supply to the ring's power jack.

1. Remove the power jack from its storage clip on the ring and

place the jack into the included cable management clip

(Figure 9).

Fig 9

Storage Clip

Thermistor Jack

2. Attach the cable management clip to the front cell of the telescope

near where the jack connects to the heater ring (Figure 10). When

doing this, avoid pulling on the jack's cable, which puts strain on

its connection to the heating circuit, and with enough force could

cause cable damage. The cable management clip holds the

jack securely to the front cell of the optical tube in a convenient

position and prevents pulls on the jack's cable when in use.

Fig 10

3. Now, just plug your 12V DC power source (5.5mm/2.1mm barrel

plug, tip positive) into the heater ring's power jack, and the ring

will begin to heat up.

When used in this "stand-alone" operation, the heater ring's

thermistor is not used, and the ring always operates at full power.

This provides the highest level of dew prevention but is not the

most efﬁ cient use of power to keep the optics clear.

At full power, the dew heater rings draw the following amount

of current:

Dew Heater Ring

Max Current Draw

0.6 A

1.0 A

1.7 A

9.25"

2.0 A

11"

2.5 A

14"

4.4 A

Make sure your 12V DC power source can deliver at least the

maximum amount of current draw, otherwise the ring may not heat

up enough to prevent dew from forming on the corrector during

heavy dew conditions.

When you are done for the night:

1. Unplug the power source from the ring's power jack.

2. Remove the power jack from the cable management clip and

place the jack into its storage clip on the dew heater ring.

3. Remove the cable management clip from the telescope. We

recommend storing this clip in your eyepiece or equipment case.

4. Now place the telescope's dust cover on the front of the

optical tube.

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