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B7-58

B7-58 is a cheap service digital device, successfully combining a lightweight, compact and robust design with high quality measurements.

Range Overview

Among the characteristic features, that distinguish this unit from the existing voltmeters are: the ability to measure the current intensity of up to 10 A, for all sub-bands measuring the voltage constant input impedance of 10 megohms, reliable protection against all inputs overload, 3 1/2 digit LCD display and a high base accuracy of the instrument at a constant current in 0.15% allow measurements with high resolution, and the converter AC mean-square voltage used in this device provides precise measurements of arbitrary waveform in the frequency range from 20 Hz to 100 kHz.

The presence of such additional features as a built-in automatic overload indication and indication of the polarity of the measured voltages provide great comfort for the operator.  An important feature of the model Q7-58 is the ability to power from the battery pack 9 VDC (A343 6 pcs.), which makes it indispensable in the field condition operation.

An important feature of the model Q7-58 is the ability to power from the battery pack 9 VDC (A343 6 pcs.), which makes it indispensable in the operation in the field condition operation.  B7-58/2 - LED.

Modifications

Technical characteristics

DC voltage:
Measurement Range 4 Х 10 -4 - 1 000 V
The basic error of measurement 0,15 %
AC voltage:
Measurement Range 2 Х 10 -3 - 700 V
The basic error of measurement 0,6 %
Frequency band 20 - 10 5 Hz
The input impedance 10 MOhm / 50 pF
DC:
Measurement Range 4 Х 10 -7 - 10 А
The basic error of measurement 0,2 %
AC:
Measurement Range 2 Х 10 -6 - 10 А
The basic error of measurement 1
Frequency band 40 - 2 Х 10 4
DC Resistance:
Measurement Range 1 - 2 Х 10 7
The basic error of measurement 0,2
Performance:
Power Supply 220 V / 50 Hz; 9 V

Потребляемая мощность 

  • Power Supply
  • Power Consumption (mains)
  • 6 V·А
  • 0,6 W
Input resistance 10 7Ohm
Operating conditions of measurement + 5  ... + 40 °С
Overall dimensions 242 Х 245 Х 70 mm

Weight

  • without battery package
  • with battery package
  • 1,3 kg
  • 1,8 kg