National Geographic Society NG770C Instruction Manual

Summary of NG770C

  • Page 1

    Watch collection ng770c / ng770d / ng771d instruction manual 2.

  • Page 3

    Dear customer, by purchasing this radio-controlled wristwatch, you have become the owner of a timepiece equipped with the very latest technology. It is operated simply with a corrector and a push button. The additional "manual start" function allows you to change the battery even when you are outsid...

  • Page 4

    General information in addition to the hour and minute hands, your watch displays the seconds digitally on the left-hand side of the lcd. Steady display of the radio tower symbol indicates that your watch is showing the exact radio-controlled time. The number to the right of the radio towers is the ...

  • Page 5

    Time zone selection press the corrector (left-hand recessed button) briefly with a pointed object. The number on the lcd now shows the hour. Each subsequent brief press on the corrector increases the hour by one, i.E., one time zone farther east. At the same time, the hands also move forward by one ...

  • Page 6

    Transmitter call press the push button (on the right) for longer than three seconds. The seconds display jumps to "00." the hands move at high speed to the 12:00 position and remain there. If they do not reach this precise position, first follow the instructions under "positioning the hands." if the...

  • Page 7

    New start after battery change the lcd shows "po 0." you must first move the hands to the exact 12:00 position with the corrector (left-hand side) and finish with the push button (right-hand side), as described in the section "positioning the hands." then, if the reception conditions are good, every...

  • Page 8

    Automatic functions of your watch synchronization accurate to the second during the night, your watch’s receiver is switched on at 2:00, 3:00, and if required at 4:00, 5:00, and 6:00 a.M. And the internal time memory is synchronized by radio signal accurately to the second. At these switch- on times...

  • Page 9

    General information • servicing, such as repairs to the crystal, seal, or wrist strap, should only be carried out by a specialist watch retailer. • seals and crystal should be inspected by an expert at regular intervals, approximately every two years. • if condensation gets into the watch, have it i...

  • Page 10

    Technical data reception frequency 77.5khz, amplitude modulated, dcf coding transmitter range (receiver sensitivity) 1,500 km radius of frankfurt am main quartz time base 32 khz battery type li cr 1620 (3 v / 75 mah) operating voltage range 2.4 v to 3.4 v battery life (normal use) 4 years time zone ...

  • Page 11

    Using slide rule this rule is good for… multiplication division proportion square root time required fuel consumption estimated flight time other flying problems note: use the control turning bezel located above the crown to move the outer scale. This scale cannot place a decimal point; therefore, t...

  • Page 12

    (3) flight distance example: obtain the air distance when the air speed is 180 knots and the flight time is 40 minutes. Operation: align "18" on the outer scale with the speed index on the inner scale. Then "40" on the inner scale corresponds to "12" on the outer scale. Thus, the air distance of the...

  • Page 13

    (6) estimated flight time example: obtain the estimated flight time when the fuel consumption is 260 gallons an hour and the aircraft has 650 gallons of fuel. Operation: align "26" on the outer scale with the speed index on the inner scale. Then, "65" on the outer scale corresponds to "150" on the i...

  • Page 14

    (8) rate of climb (or descent) the rate of climb (or descent) can be obtained from the time required to reach an altitude. Example: obtain the rate of climb when an aircraft reaches an altitude of 7,500 feet after climbing for 25 minutes. Operation: align "75" on the outer scale with "25" on the inn...

  • Page 15

    (11) multiplication example: 39 x 20 operation: align "39" on the outer scale with "10" on the inner scale. Then, "20" on the inner scale corresponds to "78" on the outer scale. Take into account the position of the decimal point and add one zero to obtain 780. Note that with the watch scales, the p...

  • Page 16

    (14) square root example: square root of 900 operation: turn the outer scale slowly and find a value that corresponds to both 90 on the inner scale and 10 on the outer scale. In this example, "90" on the inner scale corresponds to "30" on the outer scale and "10" on the outer scale corresponds to "3...

  • Page 18

    © 2008 national geographic society. National geographic and yellow border design are trademarks of the national geographic society. All rights reserved..