measuring amplifier U4-28

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Power measuring & nbsp; U4-28 & nbsp; amplifies weak AC signals. High gain, good interference rejection and low noise make it a versatile amplifier widespread use.

The device U4-28 can be used for precise intentions in acoustics, medicine, broadcasting. The amplifier works from various sensors (e.g., accelerometers), and may be incorporated in the system.

addition circuit in the appliance proper amplifier circuit U4-28 are corrective filters (A and C) and limiting the filter. Due to the jacks for external filter device can be used for the frequency analysis. There is an additional output that can be used to increase the sensitivity amplifier voltmeters, oscilloscopes, recorders

& nbsp;

U4-28 Main technical characteristics of the device:.

frequency response: 2 Hz - 200 kHz

The uneven frequency response, no more than:

& plusmn; 0,3 dB (20. Hz-20 kHz), & plusmn; 0,5 dB (2-20 Hz and 20-200kGts)

gain: 10-100 dB

error gain no more.. . & plusmn; 0,3 dB (1 kHz)

harmonic ratio: 0.1% (1 kHz)

noise voltage (referred to the input):. & nbsp;

6 mV rms. (2 Hz - 200 kHz), & nbsp;

4 mV rms. (20 Hz - 50 kHz)

Input resistance, capacity: 1 megohm, 40 pF

Output voltage: & nbsp;

14.1 In Wed. . sq. (RL = 600 ohms),

35,5 B Wed. sq. (R n = 10k)

Power consumption 45 V * A

Meal:.. 220 & plusmn; 22, 50 & plusmn; 0.5 Hz or 220 & plusmn; 11, 400 + 28-12 Hz

Weight:.. 12 kg

Dimensions: 492h134h375 mm .