This Marine Chronometer is a high-precision timing instrument. It uses the oscillation frequency of AT-cut high-frequency quartz crystal with a frequency of 4.19 MHz as the time base. It uses automatic temperature and frequency compensation of the capacitor to ensure that it can operate in a wide temperature range. Very high travel time accuracy. The time indication method is the second jump long three-hand analog type. This product uses two No. 1 batteries for power supply in parallel. This can not only improve the reliability of the work, but also facilitate battery replacement, so that the quartz clock will not stop when replacing the battery. Go, the other two batteries are connected in parallel to provide power, which also extends the service life of the battery.
This product has a very stable second signal. In addition to the needle setting mechanism for proofreading, it also has acceleration and stop buttons and other devices. This product is suitable for navigation, astronomy, earthquakes, geodesy and laboratories as a time standard.
Technical conditions
1. The oscillation frequency of the quartz oscillator is 4.194304 MHz.
2. Travel time accuracy:
instantaneous day difference
20℃＋1℃≤±0.2s
daily difference
20℃＋1℃≤±0.2s
- 10℃～+50℃≤±0.5s
3. Power supply:
The working voltage of the whole machine is DC 1.5V
4. Power consumption:
When the rated voltage is 1.5V, the power consumption of the whole machine is not more than 120μA.
5. Second hand operation mode
Second jump step-by-step
6. Anti-vibration performance
The withstand frequencies are 20. 50. 80Hz and the vibration acceleration is 1.5g.
It works normally for a total of two hours
7. Impact resistance
The impact speed is 7g and the impact frequency is 60~80 times/min.
Can work normally after 2000 impacts
8. Anti-magnetic field performance
Withstands the strong magnetic field of 60 Oersted DC and can work normally
9. Dimensions and weight
Dimensions 200×145×80mm Weight <3kg
10. additional features
It has the functions of accelerating the second hand and stopping the seconds when comparing the time.
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