School electronic clock

The Weishang School electronic clock can be used in public places such as airports, hospitals, electricity, train stations, subway and light rail, radio and television clocks, sports hall clocks, car clocks, office building clocks, hotel clocks, school clocks, and other fields.

The mother and child clock system (also known as the "standard clock system") is composed of a central mother clock and a group of various types of sub clocks. Under normal system operation, the master clock continuously calibrates its own time accuracy using synchronous satellite (GPS or Beidou system) time signals, and drives it through various applicable signal interfaces to unify the time display of all terminal clock devices (including network terminals) within the system.

The sub clock, as the basic terminal display device of the mother and child clock system, is a unified system solution for standard time in various industries. The high-precision sub clock series products produced by Jinan Weishang Electronics Co., Ltd. can receive standard time synchronization signals from the master clock (satellite synchronous clock or other standard time source) and automatically perform time correction; In the event of a temporary communication interruption with the master clock, it can automatically enter a long-term timed operation until signal synchronization is obtained again. It has a wide variety of types, high synchronization time accuracy, flexible interfaces, and self preservation functions, which can meet the various needs of various industries for sub clock functions

WeishangSchool electronic clockIt can be used in public places such as airports, hospitals, electricity, train stations, subway and light rail, radio and television clocks, sports center clocks, car clocks, office building clocks, hotel clocks, school clocks, and other fields.

WeishangSchool electronic clockTechnical Specifications:

Working voltage: AC220V ± 20%, 50Hz ± 10%

Environmental requirements: -10 ℃ to+65 ℃

Average power consumption: 5W~20W (depending on character size, single-sided and double-sided display, and display line count)

Self timing accuracy: ≤± 1 second/30 days

Self travel time accuracy: ≤± 50 milliseconds/day

LED display screen luminous intensity: 200-300mcd

Contrast ratio: ≥ 300:1

LED display visual angle ≥ ± 75 °

Mean time between failures (MTBF): ≥ 150000 hours

Mean Time to Repair (MTTR): generally not exceeding 30 minutes

The service life shall not be less than 20 years, and no maintenance is required under normal usage conditions

Electromagnetic compatibility: Level III or above standard

LED characters: red/white/green

Installation method: hanging, hoisting