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Radiometric devices >> voltmeters (V2-, V3-, V4-, V7-, V8-, V9-, F and others) >> voltmeters V3


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8 899 UAH
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Millivoltmeter V3-38V (V338V, V3 38V, b3-38b, b3 38b, b338b)

Designed to measure the rms AC voltage sine wave to convert rms AC voltage sine wave into a proportional DC voltage
Measuring range up to 300V 100mkV

Millivoltmeter V3-38V is designed to measure the rms AC voltage sine wave to convert rms AC voltage sine wave into a proportional DC voltage. The device has a 3 1/2 digit digital display.
The operating conditions of use of the instrument Millivoltmeter V3-38V: ambient temperature between 5 and 40 ° C, relative humidity up to 80% at 25 ° C, atmospheric pressure 84 to 106 kPa (630 to 795 mm Hg. Centuries). the power supply voltage (220 ± 22) V (50 ± 0,5) Hz.
Technical data
Measurement range of the instrument Millivoltmeter V3-38V from 38V to 300V 100mkV overlapping ranges with upper limits of 1 mV, 3mV, 10mV, 30mV, 100mV, 300mV, 1V, 3V, 10V, 30V, 100V and 300V
Millivoltmeter V3-38V voltage is measured in the frequency range from 20 Hz to 5 MHz. Frequency of calibration of 1 kHz.
The normal range of frequencies (I) from 45 Hz to 1 MHz incl.
The range of frequencies of the device Millivoltmeter V3-38V has a working range of frequencies:
II from 20 to 45 Hz excl.;
III St.. 1 to 3 MHz incl.;
IV St.. 3 to 5 MHz incl.
The quantization step of the instrument Millivoltmeter V3-38V is the unit price of LSB reading the digital display. Digital display has a 3 1/2 digits.
Maximum permissible relative error of the instrument at a value of δ 0 harmonic distortion measured AC voltage is not more than 1.2% is equal to the values ​​assessed by the formula:
δ 0 = ± [2,0 + (Uc / Ux -1)]% (1)
where Uk - final value assigned subband mV (B). U x - reading device mV (B).
The limit of permissible relative error of the instrument in the working areas equal to the values ​​calculated by the formulas given in Table. 1.
Table 1
Limits of error,%
Operating frequency range
1 mV-300mV
± [4,0 +2 (Uc / Ux -1)]
± [4,0 +2 (Uc / Ux -1)]
± [6,0 +3 (Uc / Ux -1)]
± [6,0 +3 (Uc / Ux -1)]

Millivoltmeter V3-38V has a broadband amplifier with output voltage (100 ± 20) mV in the high points of the sub-bands 1 mV, 3.16 mV, 10 mV, 31.6 mV 100mV, 316mV, 1V, 3.16 V, 10 V, 31.6 V, 100 V and 316V.
Millivoltmeter V3-38V has an output transducer, whose output voltage U out corresponds to the value calculated by the formula
Vout = Ux / Uc · U 0 (2)
where U k - voltage at the upper subbands 10 3 V, 3,16 · 10 -3 V 10 -2 V 3.16 · 10 -2 V 0.1 V 0.316 V 1B; 3.16 V 10B , 31.6 V, 100V and 316V.
Ux - reading, is in;
U 0 - nominal output voltage of 1V.
Limits of error voltage conversion equal to the values ​​listed above.
The output impedance of the transmitter is (1000 ± 100) ohms.
Limit of acceptable additional instrument error caused by changes in ambient temperature from normal to any temperature within the operating temperature range does not exceed half of the maximum permissible basic error for every 10 ° C change in temperature.
Limit of acceptable additional error in the shape of the deviation of the measured voltage of the sine wave (THD less than 20%) is equal to one-third of the harmonic ratio, expressed as a percentage.
The reading digital display caused by the intrinsic noise does not exceed 5% of the upper limit established by sub-band measurements with closed-circuit input.
Limit of acceptable additional instrument error caused by the influence of an external uniform magnetic field with induction of 0.5 mT, sinusoidal time-varying, with the frequency of the power supply, equal to the limit of permissible basic error.
Millivoltmeter V3-38V maintains its characteristics and kinetics within the rules if its input DC voltage of 250 V.
Response time instrument does not exceed 3 seconds. The device retains the basic error within the standards after exposure to five times the handling stress, but not more than 600 V.
Active impedance device, measured at a frequency of 45 Hz, less than 4 Mohms subbands upper limits 1mV-300mV and at least 5 megohms at subbands upper limits 1B 300B.
Input capacitance of the device no more than 25 pF on ranges with upper limits of 1 mV-300mV and a maximum of 15 pF ranges with upper limits 1B-300V.
The capacity of each of the connecting cable is not more than 80 pF. Warm-up time 5 min. Millivoltmeter V3-38V retains its specifications when powered from the mains AC voltage (220 ± 22) V (50 ± 0,5) Hz. The power consumed by the network at the rated voltage does not exceed 5.5 V • A.
Millivoltmeter V3-38V allows for continuous operation under the operating conditions for 8 hours per day. After 8 hours of continuous use the break to restart must be at least 3 hours.
Mean time between failures of at least 15,000 hours average life of 15 years. Average recovery time less than 2 hours
Dimensions, not more 155h209h278 mm dimensions shipping container no more 634h534h566 mm.
Unit weight is not more than 2.5 kg and the mass of the device with the transport container is not more than 25 kg.

Photos: V3-38V

V3-38V millivoltmeter image.
V3-38V millivoltmeter image.
V3-38V front view.
V3-38V front view.
V3-38V side view.
V3-38V side view.
V3-38V rear view.
V3-38V rear view.
V3-38V overhead view.
V3-38V overhead view.
V3-38V bottom view.
V3-38V bottom view.