P-134-1 VU Meter Level Meter Audio Volume db Meter Level DB Back Light

Specification:
1. Pointer material: Nickel silver strips
2. Pointer color: white
3. Hand movement direction: from left to right
4. Pointer length( from center axis to needle end): 70 ± 1 mm
5. Pointer width: 0.45 ± 0.05 mm
6. Meter use direction: Vertical

Electrical performance
1. Standard test conditions: Temperature 20 ° C and humidity 70%.
Can also be tested at normal temperature and humidity
2. Current sensitivity Pointer: at zero scale to maximum scale (full scale position) Sensitivity: 1000 uA ± 10%
3. Internal impedance: 100Ω ± 10%
4. Insulation resistance of the meter's outer box and the electrical circuit is 500V DC plus 50M ohm or more.
5. Insulation resistance of electrical circuit: test its insulation value with 500V DC voltage for reference
6. Zero position: The meter uses the standard posture, with the front of the pointer and the center of the zero scale as the reference.
7. Overlap tolerance of pointer and zero scale is ± 1mm
8. Equalization: The allowable error range when the meter uses a standard position tilted 90 degrees back and forth ± 1mm
12 The pointer is stuck.When the full-scale current is tripled and the overcurrent is instantaneously reduced to a reading of 1/2 of the current sensitivity
At this time, the pointer will return to the 1/3 of scale range .
13 Friction: When adding current to the meter and slowly increasing or decreasing to a certain value, the error range of the indicated point is ± 1mm
14. Brake Add the current value of the scale plate 2/3 instantly, the time required from the start to the position indicated by the pointer is within one second

Special test
15. Overload test Ten times of full scale current is input every five seconds, and this action is repeated nine times. Each time is 0.5 seconds.
7-14 items remain normal after this test
16. Vibration test After the meter is packaged, it vibrates up and down 4mm per minute on a vibration plate 1,000 times per minute.
10 minutes in each direction. 7-14 items remain normal after this test
17. Impact test After the meter has been packaged, it has dropped from a height of 30 cm to a 3 cm thick wooden board, and tested in three directions X.Y.Z.
7-14 items remain normal after this test
18. Reliability test After 100,000 correction point current inputs, the current sensitivity limit is still within the standard
19. Environmental impact test Temperature 50 ℃, humidity 85%, 100 hours, after this test 7-14 items remain normal
20. Terminal pull test Terminals must withstand a 1 kg pull for 60 seconds without being affected

Others
21. Operating temperature limit －10 ℃ to ＋ 60 ℃ RH 35 to 85%
22. Storage temperature limit -20 ℃ to ＋ 60 ℃ RH 35 to 85%
Do not place the meter in direct sunlight and store the meter in the box to prevent foreign objects from entering the meter.
23. Soldering conditions Put about 3 mm of the terminal into a tin plate with a temperature of 230 ° C and leave it for 3.5 seconds
7-14 items remain normal after this test
Soldering temperature Hand held soldering gun temperature 350 ℃, contact the terminal for 3.5 seconds, the front end of the terminal is about 3mm in contact with the soldering gun
7-14 items remain normal after this test
24. Anti-static test with a dry nylon cloth on the surface of the transparent cover in the same direction three times.
Below 1/3, return to zero position after three seconds
25. bulb specifications 4 white LED backlights, connected in parallel to the PCB (80mA at 3.0-3.2V), the backlight voltage can be changed to 12V for free