User`s Manual Astro-Smart External Dew Annihilator
Contents
1. Users Manual for the Astro Smart External Dew Annihilator External Differential Dew Heater Module Model eDA Copyright September 2013 User s Manual for the Astro Smart External Dew Annihilator Model eDA Contents AS AA dieceecacecdens cea cends Saebaceedeeesedscanesced cnscenss Shebadesdeeeeanseaeeeenges Contents Included eeeecceeeeececcccesceccccsscccecccccceccccceceececceceececccceceececcsseececceueece E Oe e 1 Front Panel da aida 2 Operation nados G Accessories sccccesecccececcceccecceccecceccecccscecseccusecccececccecccccesceccescesesccsesccceecaeess Specifications sssrini E E A ane muamoannnnas Design Features A e Basic Finca alias HOW t Usted Astro Smart LLC P O Box 33753 Indialantic FL 32903 Page 1 External Dew Annihilator Model eDA astro smart com September 2013 External Dew Annihilator Model eDA A Overview Astro Smart LLC is the innovator of this elegant solution to your dew problem The External Dew Annihilator allows your investment to be brought back to its original condition without alteration The External Dew Annihilator Model eDA Figure 1 can be used with any telescope The External Dew Annihilator incorporates a four port heater capability controlled by two channels using two remote temperature sensors one optional It will work with one remote temperature sensor or with a second remote sensor Figure2. D Power Switch Figure 6 Front Panel Layout Providing the Astronomical Community with Premier Products Services and Training Page 8 External Dew Annihilator Model eDA astro smart com September 2013 The following are descriptions of each of the major control panel features A Channel ON LED Indicators Each of the two dew heater channels has a separate indicator When the respective Channel is powered ON by the External Dew Annihilator Model epa circuit the appropriate red LED will illuminate This indicates power is being supplied to the dew straps that are plugged into the respective Channel Dew Strap Plug B Channel 1 Dew Strap Plug These two plugs provide power to the two dew straps when they are plugged into them When the Channel 1 On LED Indicator illuminates then there is power supplied to these Channel 1 Dew Strap Plugs They are standard RCA plugs Any standard dew strap from astronomical vendors will work with the External Dew Annihilator Model eDA C Remote Sensor Plugs The Remote Temperature Sensors are plugged in here The External Dew Annihilator Model epa comes with one Remote Temperature Sensor It can be plugged into either Remote Sensor Plug and provide temperature information to both Channels If the 21d Remote Temperature Sensor Accessory is purchased and utilized then each Channel will have its own remote sensor D Power Switch The Power Switch is the main on off switch for
3. 10 degree Celsius temperature differential Both Channels use the same setting that is made with this knob The Temperature Differential LED Bar Graph indicates the setting the user has set with this knob Each degree Celsius is indicted by an LED on the Temperature Differential LED Bar Graph Providing the Astronomical Community with Premier Products Services and Training Page 9 External Dew Annihilator Model eDA astro smart com September 2013 3 Operation Once the External Dew Annihilator Model epa Remote Sensor cable s and dew strap cables have been installed according to the procedures above turn the External Dew Annihilator ON using the Power Switch D When the External Dew Annihilator is turned on you will see the Power Switch red LED illuminate This is the indication that power is being supplied to the External Dew Annihilator circuit and is ready for use You may see other LEDs lit at this time depending on the setting of the Temperature Differential Setting Knob 1 Check the weather conditions for your observing site Note the temperature difference between the ambient temperature and the dew point If the temperature difference is relatively small on the order of 5 degrees Fahrenheit or less you should set the Temperature Difference Setting Knob I such that the Temperature Differential LED Bar Graph G indicate a setting on the appropriate Temperature Differential Scale E that is at le
4. Plugs B The Channel ON LED A will illuminate ON as the External Dew Annihilator heats the optical elements and OFF as the optical elements heat above the sum of the Ambient Sensor H temperature plus the Temperature Differential Setting G Providing the Astronomical Community with Premier Products Services and Training Page 10 External Dew Annihilator Model eDA astro smart com September 2013 G Accessories You may use a power supply you already have that meets the specifications listed above or you may purchase one from Astro Smart Our power supplies provide 12v at 3 3amps and will provide years of dependable service along side your External Dew Annihilator Model eDA An optional second remote sensor is available 2RSDDH M See Figure 7 This 2nd Remote Sensor allows you to control the heating of separate optical elements For instance one remote sensor would be placed with your heater at the corrector A second sensor could be placed at your eyepiece or finder scope objective lens In this setup each pair of heaters is controlled by their respective sensor This allows greater control for the user This item can be purchased at the same time as you purchase your External Dew Annihilator Model epa or at a later time If you only use the included remote sensor then all four heater connectors are controlled by the one sensor and it can be plugged into either remote sensor jack Figure 7 Remote Sen
5. 1 External Dew Annihilator available separately making your Model eDA corrector dew control independent from your eyepiece or guidescope dew control for instance B Contents Included 1 User Manual for External Dew Annihilator Model eDA 2 External Dew Annihilator Model eDA 3 Remote Sensor Model eDA Providing the Astronomical Community with Premier Products Services and Training Page 2 External Dew Annihilator Model eDA astro smart com September 2013 C Specifications The External Dew Annihilator Model epa requires the following e 12 Volts at 3 amps minimum Note This current drawn through the External Dew Annihilator Model eDA is dependent on the resistance of each dew strap being used with the External Dew Annihilator Model epa The total current for all the dew straps must not exceed the power supply current rating see red highlighted equation below The total resistance of all the dew heater straps used with the External Dew Annihilator Model eDA must follow this equation for SAFE operation Current Rating of Power Supply 1 1 Voltage output of Power Supply Rswap gt AA AS Rstrap 4 Astro Smart LLC assumes no responsibility e Center positive voltage sleeve ground See Figure 2 e Positive 12V Grounded Sleeve Figure 2 DC power plug e Uses dew straps manufactured by other astronomical vendors You must verify usability via
6. ast 2 degrees Fahrenheit The Temperature Differential LED Bar Graph G is a visual indicator of the temperature differential setting the user has set with the Temperature Differential Setting Knob 1 Power is supplied to a Channel s when the temperature difference between the Remote Sensor s C and the Ambient Sensor H is greater than the setting of the Temperature Difference Setting Knob I indicated by the Temperature Differential LED Bar Graph G You may notice when the Temperature Differential Setting Knob I is turned clockwise a small amount from the minimum setting that the Channel ON LED s A will illuminate but the Temperature Differential LED Bar Graph G will not be illuminated This condition indicates a Temperature Differential Setting of 0 5 degrees Celsius All other Temperature Differential Settings are indicated in 1 degree Celsius increments When only one Remote Temperature Sensor C is used both Channels are controlled by that sensor A single Remote Temperature Sensor C can be plugged into either Channel s Remote Sensor Plug C When two Remote Temperature Sensors C are used then each sensor controls the Channel into which it is plugged When a Channel s Remote Sensor C temperature falls below the sum of the Ambient Sensor H temperature plus the Temperature Differential Setting G then the External Dew Annihilator Model epa will supply power to the applicable associated Channel s Dew Strap
7. cidental or intentional abuse tampering or the wear and tear of normal use Astro Smart External Dew Annihilator Model eDA Module 90 days for parts and labor Sensors 90 days for parts and labor In no event shall Astro Smart LLC be liable for any claim for incidental or consequential damage arising out of or in connection manufacture delivery or use of any product offered on this website or by information received by US mail E mail data files or fax Astro Smart LLC is not responsible for damage caused by the freight carrier i e UPS FED EX etc to our product Warranty coverage excludes normal wear and tear or damage caused by improper installation any modification abuse misuse improper maintenance and unauthorized repairs or modifications to the original product Warranty does not cover those parts prone to failure under normal wear and tear Any product repair request must be submitted and approved before shipment to Astro Smart LLC Shipper is responsible for proper packaging shipping and insurance on approved repair items Providing the Astronomical Community with Premier Products Services and Training Page 12
8. gure 3 Temperature Scale of the Dew Annihilator model ipa shown Providing the Astronomical Community with Premier Products Services and Training Page 4 External Dew Annihilator Model eDA astro smart com September 2013 F How to Use Jj 1 Setup 1 Ensure the Power Switch is in the OFF position See 2 Figure 6 Page 7 item D 3 4 Conveniently locate your External Dew Annihilator on your telescope or other Ensure the Temperature Differential Setting Knob is rotated Counter Clockwise suitable location Connect the Remote Sensor cable that was supplied with the External Dew Annihilator into the Remote Sensor Plug See Figure 6 Page 7 item C If you purchased the 2 4 Remote Sensor you may install it at this time Connect any dew straps that you have See WARNINIG Ensure the total resistance meets the specifications provided in Section C on Page3 Astro Smart is not responsible for failure to heed this warning Ifyou purchased the Right Angle dew strap connector s you may choose to install them at this time along with the connection of your dew straps Install the Remote Sensor at each location under the dew strap with the flat face of the sensor facing the telescope finder or eyepiece piece See Figure 4 Providing the Astronomical Community with Premier Products Services and Training Page 5 External Dew Annihilator Model eDA astro smart com Sep
9. rance or damage claims will be accepted more than three days after delivery All Customers MUST call before returning products for warranty or repair to get an RMA Return Merchandise Authorization or an SRO Service Repair Order as well as return shipping instructions and return shipping address Items being returned from the continental US must be sent PARCEL POST unless directed by Astro Smart LLC to do otherwise Failure to do so will result in customs and administration charges being charged to the customer s account or the shipment being refused Product is to be returned with delivery and insurance charges prepaid and these charges are not refundable Limited Warranty Upon receipt of returned product Astro Smart LLC will assess the item s to determine if they comply with the conditions of our warranty Items that do comply will be fixed or replaced free of charge Items that are deemed to be out of warranty or have had their warranty voided will with the customer s knowledge be fixed at our costs specified below or replaced with new product paid for at full retail value Please note that items that have been returned for repair or assessment and are deemed to be in proper working order will have a 60 00 bench charge applied as well as return shipping costs Repairable items that are out of warranty will be charged 70 00 per hour plus parts as well as return shipping costs Our warranty does not cover damage due to misuse accidental in
10. sor accessory Another convenient accessory that Astro Smart offers is a right angle heater connector RAHC DM See Figure 8 This allows your heater to be connected to the External Dew Annihilator Model eDa at a right angle This may be convenient for you to alleviate any bending that you have of your heater connector and wire Figure 8 Right Angle dew strap connector Please note that when purchasing the Astro Smart External Dew Annihilator Model eDA you can use the heater straps you may already have Providing the Astronomical Community with Premier Products Services and Training Page 11 External Dew Annihilator Model eDA astro smart com September 2013 Visit Astro Smart for more astronomical products and services at www astro smart com Return Policy All items must be in new mint condition Returned items cannot show evidence of use or wear dirt or blemishes of any kind Merchandise must be returned in its original packaging and should include all supplied materials instructions warranty cards original accessories hardware and any software provided Astro Smart LLC is not responsible for lost or damaged packages Return shipping costs are the responsibility of the customer A 20 restocking fee will apply to returnable items if they are returned within 15 days of shipment from us Items must be in as new condition and unopened We ask that you open and inspect your order upon receipt since no insu
11. tember 2013 Figure 4 Remote Sensor Placement 10 Route the Remote Sensor s cables along with the dew strap cables A convenient way to do this is to braid the two cables together See Figure 5 If you have two Remote Sensors route one with the dew strap that is used for your telescope s main surface to protect Route the second Remote Sensor cable along with either the dew strap that is used for your eyepieces or your finderscope Providing the Astronomical Community with Premier Products Services and Training Page 6 External Dew Annihilator Model eDA astro smart com September 2013 Vionmra Raoa anta rigure Ro urle Stran tral K b 11 Connect the power supply that is 12V 3amp minimum See Section C Page 3 Providing the Astronomical Community with Premier Products Services and Training Page 7 External Dew Annihilator Model eDA astro smart com September 2013 l 2 Front Panel The front panel contains all the controls the user requires See Figure 6 INTEGRATED DEWA NNIHILATOR E Temperature IDA M_ Differential Scales A Channel On HEATERS lt 3 LED Indicator 1 an at ip 90 g 3 ao 4a gt gt E F Channel 2 Dew 65 0 B Channel 1 Dew e o E Strap Plug Strap Plug A ae si G Temperature Differential LED C Remote Bar Graph Sensors Plugs H Ambient Temperature Sensor I Temperature Differential Setting Knob
12. the External Dew Annihilator Model eDa In the ON position the Power Switch s internal LED illuminates indicating power is being supplied to the External Dew Annihilator E Temperature Differential Scales There are two Temperature Differential Scales provided on the front panel The Temperature Differential Setting is indicated with the Temperature Differential LED Bar Graph G The left Scale is in Celsius and the right Scale is in Fahrenheit The Celsius graduates from O to 10 degrees every degree The Fahrenheit Scale is converted and rounded for each Celsius scale F Channel 2 Dew Strap Plug See B above G Temperature Differential LED Bar Graph This 10 LED bar graph indicates the desired Temperature Differential Setting between the Ambient H and Remote C Temperature Sensors Each LED in the bar graph indicates 1 degree Celsius temperature difference set between the two sensors H Ambient Temperature Sensor This sensor is mounted internal to the External Dew Annihilator Model ena and is visible on the front panel It senses the ambient temperature for use by the External Dew Annihilator to determine the temperature difference between it and the remote sensors I Temperature Differential Setting Knob This knob allows the user to set the temperature difference that they wish to use for the activation of power to the dew straps Turn the knob fully counter clockwise for no temperature differential and fully clock wise for maximum
13. the equation above Providing the Astronomical Community with Premier Products Services and Training Page 3 External Dew Annihilator Model eDA astro smart com September 2013 D Design Features The Astro Smart External Dew Annihilator Model epa has these innovative and unique features e Efficient and elegant use at your telescope e Itis lightweight Yet aids balancing when placed appropriately e High quality components and construction Astro Smart uses only the best quality components e Itcan keep optical surfaces free of moisture in many different circumstances e High quality design employs multi layer circuit boards with conformal coatings E Basic Functionality The user simply adjusts the temperature differential based on local current ambient and dew temperature conditions The External Dew Annihilator Model epa displays the above ambient temperature differential setting via a bar graph showing each degree Celsius temperature difference The display is also calibrated for Fahrenheit degrees as well Each External Dew Annihilator Model epa comes with one remote sensor You simply co locate the sensor head with your primary heater Figure 3 displays the normal a closer view of the Temperature Scale INTEGRATED DEW ANNIHILATOR DA M _ HEATERS C TEMPA F o 9 o 16 2 8 0 70 14 4 12 5 10 8 so 9 0 4 0 7 2 3 0 5 4 2 0 3 6 1 0 1 8 SENSORS REMOTE Fi
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