Radio Room clocks

 IMPA CODE: 370201

For use in radio rooms, the diameter of the dial is 200mm with the numerals 1-12 on the outer edge and the numerals 13-00 on the inner side showing international time. seconds are marked clearly in red between the hour numerals, there are two 3 minute silent periods at 15 and 45 minutes past the hour marked in red,the clock has 2 hour hands, one to be set in Greenwich Mean Time and the other to indicate local time.
 

specification:

Quartz clock is the use of the new electronic technology and the traditional mechanical watch manufacturing process of new products, the movement of metal materials. The products use high frequency, temperature coefficient of quartz resonator as frequency standard CMOS integrated circuit of stepper motor drives the pointer instruction time. All the crystals and circuit carefully screening aging treatment. The clock with timing accurate, reliable work, convenient, less power consumption and other advantages, and center second and marked with a quiet time full - scale dial and pointer for double color pointer, and instructed the Beijing time and Greenwich time. Ship radio room essential instruments for navigation and other departments.
 

Two, the main technical conditions:

1: NDK4.194304MHz quartz resonator

2, integrated circuit: 5360, frequency coefficient: 223, pulse width 46.875ms, bipolar pulse, the output frequency of 0.5Hz.

3, a pair of eccentric type transducer: stepper motor, the output torque is greater than 10 * 10-3Nm. minute

4, travel time accuracy: ambient temperature +20 - 1 Deg. C, on the error is less than 0.2 seconds, the ambient temperature of 0 DEG +40 DEG C time error is less than 0.3 seconds, for the environment temperature of -10 to +50 DEG C.

5, a battery two a year.

6, the impact resistance performance of vibration: vibration: 80Hz, 5g, 2G; impact: 30 minutes. In the vibration, can work under impact condition.

7, size and weight: size 208 x 60mm, weighing about 1.2kg, dial diameter 150mm.

Three, work principle:

4.1934MHZ quartz resonator by the integrated circuit produced after the shock, the frequency, power amplifier to drive the stepper motor, the transmission gear variable speed drives the pointer, the second runner. Mode of operation for the second jump.
 

Using:

1, after the opening of the first reading the instructions.

2, install the battery: hand pressure shell of clock according to the direction of graph door handle red marker to the rotating dial, out, open the shell of clock, battery in positive and negative direction into the battery box inside, clock move, the clock shell, revolving door handle is tightly locked.

3: rotary dial dial needle needle handle the minute, hour dial to the desired position along the dial can be.

4 fixation methods: 1 can be suspended

The fixed installation: according to the second method open shell bell, with three screws and washer penetrating the bottom three waterproof rubber ring hole and fixed on the wallboard. Note: the clock 12 and 6 location should be installed vertically.

5, the long-term use of the clock, crystal aging ultra poor adjustment of the capacitor. (adjust the use of calibration instrument or frequency meter measurement, no instrument and no experience to tune).

6, detail specification 1 accessories; screws (3 of 3 * 20MM)

Ship inspection certificate 1 copies of 3 washers