TN-73 Высокоточный вю-метр усилитель головки трубки дБ Настольный разряд мощности плоский Настольный миксер измеритель мощности мост с подсветкой

P-200 High-precision VU Meter Head Single-ended Class A Amplifier Tube amplifiers level DB Table Audio Power Meter w/Backlight

Parameters：

● Pointer material: Nickel silver strips ● Pointer color: Fluorescent red orange ● Pointer swing direction: from left to right ● Pointer length: 90±1 mm from the center axis to the needle end ● Pointer width: 0.45 ± 0.05 mm ● Electric meter use direction: vertical

Performance:

● The temperature is 20 ℃ and the humidity is 70%. If there is no difference in the test results, the test can also be performed at normal temperature and humidity ● Pointer from zero scale to maximum scale (full scale position) Sensitivity 1200 uA ± 10% ● Internal impedance: 400Ω± 10％ ● 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 by 500V DC voltage. ● Zero position: the standard position of the meter is used, the front end of the pointer and the center of the zero scale are the reference, and the tolerance of the overlap of the pointer and the zero scale is ± 1mm ● Balanced; the allowable error range of the meter when the standard position is tilted back and forth by 90 degrees is ± 1mm ● The pointer sticks: when the full-scale current triples the overcurrent in an instant and slowly reduces to the current sensitivity reading of 1/2, the pointer will return to the scale of 1/3 ● Friction: When the current is added to the meter and slowly increased or decreased to a certain value, the error range of the indicated point is ± 1mm ● Braking: instantly add 2/3 of the current value of the scale plate, within one second from the start to the position indicated by the pointer

Special test:

● Overload test: input ten times of full-scale current every five seconds, this action is repeated nine times. Each time is 0.5 seconds, after this test remains normal ● Vibration test: After the meter is packaged, perform 1,000 vibrations up and down 4mm per minute on the vibration plate for 10 minutes in each direction. This test remains normal ● Impact test: After the meter is packaged, it is dropped from a height of 30 cm on a 3cm thick wooden board. The X.Y.Z. three-direction test will remain normal ● Reliability test: After 100,000 correction point current inputs, the current sensitivity limit is still within the standard ● Environmental impact test: temperature 50 ℃, humidity 85%, lasts 100 hours, after this test remains normal ● Terminal pull test: the terminal must withstand 1 kg of pull for 60 seconds without being affected

The others:

● Operating temperature limit: -10 ℃ to + 60 ℃ RH 35 to 85% ● Storage temperature limit: -20 ℃ to + 60 ℃ RH 35 to 85% ● Do not put the meter under direct sunlight, and store the meter in the packing box to prevent foreign matter from entering the meter ● Soldering conditions: Put the terminal about 3 mm into a tin plate at a temperature of 230 ℃ for 3.5 seconds, and keep it normal after this test   ● Soldering temperature: Hand soldering gun temperature is 350 ℃, contact the terminal for 3.5 seconds, the front end of the terminal is about 3mm and the soldering gun is in contact, the test remains normal ● Anti-static: dry nylon cloth is tested three times in the same direction on the surface of the transparent cover, and the difference between the pointers on the score is less than 1/3 of the scale length, and the position returns to zero after three seconds ● Lamp specification: blue LED backlight board, parallel to PCB 3.0V, we can change the backlight to 12V for you free of charge

Package include:

1pcs P-200 High-precision VU Meter