In the range of 8℃~38℃, the daily change caused by a 1℃ change is ≤0.15 s/d
Voltage coefficient
Daily variation caused by voltage fluctuation of 1V ≤ 0.15 s/d
Battery life
≥1 year (smart watch ≥7 days)
Poor coordination of hour and minute hands
Pointer watch: minute hand deviates from "12" hour mark ≤ 24°
3. Security and reliability
Structural safety : no components will fall off; the strap is resistant to tensile and torsional fatigue (elongation ≤3%, buckle hole deformation ≤50%); no risk of injury from sharp edges.
Environmental tolerance :
Waterproof : Those with the mark must comply with GB/T 30106 standard.
Shockproof : Marked ones comply with GB/T 38022; unmarked ones must pass the vibration test (stop ≤ 10s).
Anti-static : LCD/smart meter functions normally after electrostatic test.
Durability :
Light-resistant (no abnormality is shown after 1 minute of strong light exposure).
Corrosion resistant (no corrosion spots/salting out on the surface).
Cover adhesion (no cracking/peeling).
4. Appearance and Display
Dial : Characters are clear and flawless; glass/back cover assembly is solid with no gaps.
Display requirements :
LCD: no missing lines, ghosting, or hidden images.
Pointer watch: When the hour marker coincides with the hour hand, the deviation of the minute hand is ≤24°.
High and low temperature cycle (-5℃/50℃ for 24 hours each), if the machine stops or displays abnormality, it will be deemed unqualified.
Timekeeping quality
Measure the instantaneous daily difference for 3 consecutive days and calculate the average value and temperature/voltage coefficient.
Battery life
According to the formula: L = battery capacity / working current × 0.85 (measured current method).
shockproof performance
After the vibration test, there is no looseness of components, the LCD display is normal, and the pointer meter error is ≤10s.
Light resistance
Shine an 8W incandescent lamp at a distance of 1cm for 1 minute and check the display status.
3. Additional requirements for smart meters
Functions such as positioning, calling, and health monitoring must be 100% effective.
App remote control (disabled during class) responds accurately.
In summary : Children's watches must meet stringent environmental adaptability (temperature/voltage), timekeeping accuracy (daily error ≤ ±2s/day), and physical safety (shockproof/waterproof). They must also undergo specialized testing to verify battery life, display reliability, and structural durability. Smart watches also require stable communication functionality. The overall appearance of the product must be free of safety hazards and meet the special protective requirements of children.
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Children's watch inspection requirements and methods
Children's watches are wearable time management and functional devices designed specifically for children, combining various uses such as timing, learning, entertainment, and safety management. They can be categorized by function as standard analog or electronic watches, learning watches, and smart watches. Standard children's watches have simple structures and bright colors, helping children learn time and cultivate punctuality.
