High-precision VU Meter DB Level Header Amplifier Chassis Audio Preamp w Backlight T-90
Parameters
Movable part: moving coil typePointer material: zinc-nickel alloy
Pointer color: black
Pointer swing direction: from left to right
Pointer length: 44±1mm from central axis to needle end
Pointer width: 0.45 ± 0.05 mm
Electric meter use direction: vertical
Operating temperature limit: -10℃ to＋60℃; RH 35 to 85%
Storage temperature limit: -20℃ to＋60℃; RH 35 to 85%
(Do not place the meter under direct sunlight, and store the meter in the packing box to prevent foreign objects from entering the interior of the meter)
Soldering condition: Put the terminal about 3 mm into the tin plate at 230℃ for 3.5 seconds. After this test, items 7-14 remain normal
Soldering tin temperature: hold the solder gun temperature at 350℃, contact the terminal for 3.5 seconds, the front end of the terminal is about 3mm in contact with the solder gun, after this test 7-14 items remain normal
Anti-static: Use dry nylon cloth to test three times in the same direction on the surface of the transparent cover, and the difference of the pointer on the mark is less than 1/3 of the length of the scale, and it returns to the zero position after three seconds
Bulb specification: 12V yellow neon bulb
Features
1. Standard test conditions: temperature 20℃, humidity 70%, the test can also be carried out at room temperature and humidity if there is no difference in the test results.
2. Current sensitivity: the pointer is at the zero scale to the maximum scale (full scale position), the sensitivity is 960uA±8%
3.Internal impedance: 650 Ω ±10%
4. Insulation resistance: 500V DC plus 50M ohm or more for the outer box of the meter and the electrical circuit. The insulation resistance of the meter housing and the electrical circuit is tested with a 500V DC voltage.
5.Zero position: The meter uses the standard posture, the front end of the pointer and the center of the zero scale are used as the reference, and the overlap tolerance of the pointer and the zero scale is ±1mm
6. Balance: The allowable error range of the meter when the standard position is tilted 90 degrees back and forth is ±1mm
7. Pointer sticking: Instantly add the full-scale current three times the overcurrent, and slowly decrease to the reading of 1/2 of the current sensitivity, at this time the pointer will return to the scale of the scale board 1/3 of the range
8.Friction: When adding current to the meter and slowly increasing or decreasing to a certain value, the error range of the indication point is ±1mm
9. Braking: Instantly add 2/3 of the current value of the scale plate, and the time required from the beginning to the pointer indicating position is within one second
Special test
1. Overload test: Input ten times the full scale current every five seconds, and this action is repeated nine times. Each time is 0.5 seconds, after this test 7-14 items remain normal
2. Vibration test: The meter is packaged and subjected to 1,000 up and down 4mm vibrations per minute on the vibrating plate, 10 minutes in each direction. After this test, the 7-14 items remain normal
3.Impact test: After the meter is packaged, it is dropped from a height of 30 cm on a 3cm thick wooden board, tested in X.Y.Z. three directions, after this test, the 7-14 items remain normal
4. Reliability test: After 100,000 calibration point current inputs, the current sensitivity limit is still within the standard
5. Environmental impact test: temperature 50℃, humidity 85%, lasting 100 hours, after this test 7-14 items remain normal
6. Terminal pull test: The terminal must withstand a pull of 1 kg for 60 seconds without being affected
package
1pcs T-90 VU Meter
Payment Details
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Delivery Details
We provide standard shipping to international via China Post airmail or Hongkong Post airmail with tracking number.Contact us if not receive items.
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Returns and Replacements
We accept returns and replacements within 30 days from the day the cutomer receive the products.Please make first contact within 30 days from receiving the order.Products should be returned in original condition.
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