User manual MEADE PERSONAL SOLAR TELESCOPE

[. . . ] Begin the timing as the star crosses one edge of the scale and end the timing as the star crosses the other edge of the scale. Record the timings and average them. 8. 2 3 4 360° Position Angle Segmented in Units of 5° Scale Double Crossline/ Concentric Circle Guiding Scale Four Concentric Circles with Each Inner Circle Representing . 5 Width, . 25 Width, and . 10 Width of the Outer Circle Dimension, Bisected with a Double Crossline With the timings recorded and averaged, an accurate determination of the angular diameter of the sky that the Linear Diameter Scale represents can be calculated. Stars at or near the zenith move across the sky at 15 arc seconds per second (sidereal rate). To determine the true angular diameter in arc seconds, multiply the number of seconds of the averaged timing of the scale by 15. [. . . ] To make a position angle measurement, calibrate the orientation of the 360° Position Angle Scale (3, Fig. 2) along the east-west line of the sky by following these steps: 1. Set up the telescope and insert the Astrometric Eyepiece with the LED illuminator turned on. Check the collimation of the telescope (refer to the telescope's instruction manual). A collimated telescope produces the best image possible. Aim the telescope at or very near (within +/- 5°) the zenith (perpendicular to the ground). Release the set-screw of the eyepiece holder and rotate the Astrometric Eyepiece within the eyepiece holder so that a star drifts across the 90° mark of the Position Angle Scale and then exits across the 270° mark. Tighten the set-screw of the eyepiece holder to lock the position. Find the object that the position angle is measured for (e. g. , discernable edge or center line of a comet's jet or tail that extends across the eyepiece field of view). Read the position angle. 3. For example, if the nucleus of a comet is placed in the center of the Linear Diameter Scale, and the center of the tail (the object the PA measures for) is in-line with the first segment after 300 on the Position Angle Scale, then the PA of the center of the comet's tail is 305°. 3. 6. Important Note: The Position Angle Scale reads clockwise from 0° to 360° as used through mirror-lens Cassegrain telescopes (e. g. , Schmidt-Cassegrain, Maksutov-Cassegrain), or refractors where a diagonal mirror/prism is being used. Between battery replacements clean the battery contacts with the eraser-tip of a pencil. If you have any questions regarding the use of the MA 12mm Astrometric Eyepiece, please call Meade Customer Service at (949) 451-1450. Customer Service hours are from 7:00 A. M. Battery Safety Instructions · Always purchase the correct size (2 x 1. 5V MS-76/LR44, SR1154, SR44 ANSI, LR6 IEC, SR1154 IEC) and grade of battery most suitable for the intended use. · Replace all batteries of a set at the same time. · Clean the battery contacts and also those of the device prior to battery installation. · Ensure the batteries are installed correctly with regard to polarity (+ and -). · Remove the batteries from any weather station which is not to be used for an extended period of time. · Remove used batteries promptly. · Do not mix old batteries with new batteries. · Do not mix alkaline, lithium, standard (Carbon Zinc), or rechargeable (Nickel Cadmium) batteries. [. . . ] This warranty supersedes all previous Meade product warranties. 3. · · Guiding the Telescope: The Double Crossline/Concentric Circle Guiding Scale (4, Fig. 2) is specifically designed for guiding on a star during an astrophotograph. The finest astrophotographs have sharply focused stars that are perfectly round. In order to achieve this level of quality in the final image, constant monitoring of a "guide star" is required to make the proper "drive corrections. " The double crosslines and concentric circles of the Guiding Scale allow for a single star or group of stars to be guided on simultaneously. [. . . ]