This standard specifies the inspection position markings and definitions for timing instruments. This standard applies to the inspection position markings of pointer-type timing instruments, as well as the inspection position markings of movement-type timing instruments and timing instruments without conventional dials. The markings and definitions specified in this standard are independent of the type, structure or size of the timing instrument. GB/T 4028-1994 Inspection position markings for timing instruments GB/T4028-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Timekeeping instruments-bzxZ.net
Symbolization of control positionsThis standard is equivalent to the international standard ISO3158-1976 "Timekeeping instruments-1 Subject content and scope of application
This standard specifies the inspection position markings and definitions of timekeeping instruments. - Inspection position marking".
GB/T4028--94
ISO3158-1976
Replaces GB4028-83
This standard applies to the inspection position markings of pointer-type timekeeping instruments, and also to the inspection position markings of movement and timekeeping instruments without conventional dials.
The markings and definitions specified in this standard have nothing to do with the model, structure or size of the timekeeping instrument. 2 Definitions
The position of a timing instrument or its movement is based on the Z-axis direction opposite to the direction of gravity acceleration (Figures 1 and 2), and is marked by angles θ and θ. The definitions of angles θ and θ are as follows. 2.1 Angle θ is the angle of rotation of the timing instrument in the counterclockwise direction around the X-axis perpendicular to the dial (Figure 1). The range of θ is: 0≤<360° (the range of θ is between 0° and less than -360°). 2.2 Angle θ is the angle of rotation of the timing instrument around the axis perpendicular to the ZX plane (Figure 2). 2
Enter=0°
Enter=Enter
>0° means the highest point on the dial rotates away from the observer; State Technical Supervision Bureau approved 726 on December 30, 1994
Enter arbitrary
Enter arbitrary
Observation direction
Implementation on October 1, 1995
GB/T4028-94
9<0° means the highest point on the dial rotates towards the observer; the range of 6 is: -90≤9≤+90° (the range of 8 is between ±90°). 2.3 When Ent = 0° and 9 = 0°, the axis passing through 6 o'clock and 12 o'clock should coincide with the Z axis (for timing instruments or movements without conventional dials, the provisions of Chapter 4 should be followed).
3 Commonly used inspection position indication methods
3.1 Vertical position
Vertical position shall be indicated in accordance with the method specified in Table 1. Table 1
Symbol (diagram)
3 o'clock
6 o'clock
9 o'clock
12 o'clock
3H or 3
6H or 6+
9H or 9
12H or 12
Enter 90°
Enter = 180°
Enter = 270°
Enter = 0°
To mark vertical positions different from the above positions, a similar indication method may be used, i.e., using the top number on the dial to indicate. For example: 4h or 4 when 4 o'clock is at the top.
3.2 Horizontal position
The horizontal position shall be indicated in accordance with the method specified in Table 2. 727
Symbol (Figure)
3.3 Inclined position
GB/T4028—94
Dial facing upward (on the surface)
Back cover facing upward
(below the surface)
Dial facing downward
The inclined position shall be indicated in accordance with the method specified in Table 3. Symbol (picture)
Tilt back at 12 o'clock (the
highest point of the dial
tilts 30° away from the observer)
CH or C↑
FH or F
CB or C
12H+30°
12++30°
Enter any
0=+90°
Enter any
6-—90°
Enter 0°
9=+30°
To mark the actual tilt position different from the above position, first mark the top number of the dial, followed by H or +, and then mark the angle value of θ.
4 Method of indicating the position of a timing instrument or movement without a conventional dial For a timing instrument without a conventional dial (digital display timing instrument) or a separate movement, the following method shall be used for indication. For a timing instrument without a conventional dial or a separate movement, it can be assumed that there is a fictitious dial in the normal use position. When reading in the normal identification position, the central axis Z of the dial passes through 12 o'clock and 6 o'clock, the left side of the center line is 9 o'clock, and the right side is 3 o'clock, and then marked according to the method described in Chapter 3.
Additional remarks:
This standard was proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Clocks and Watches. This standard was drafted by the Clock and Watch Industry Science Research Institute of the Ministry of Light Industry. The main drafters of this standard are Lin Shuqin and Zhao Yanyu. 728
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