Voltmeter V7-18 (V7-18, v 7-18, v-7-18 v 7 18; v7-18; v7 18; v 7-18; v-7-18; v 7 18)
Voltmeter V7-18 - Universal panel meter for measuring DC voltage, DC current, DC resistance, frequency, sinusoidal oscillations of electrical f ormy, AC voltage (in co-operation with the converter B9-1).
- Constant voltage - 0.1 V - 1 kV;
- DC - 1 uA - 100A;
- Resistance - the 1st - 10MOm;
- Frequency - 10Hz - 1MHz;
- AC voltage - 0.01 V - 100 V (common with transmitter B9-1).
Overall dimensions - 190 × 135 × 475mm.
Weight - no more than 25kg.
Voltmeters V7-18 allow the basic error of measuring DC voltage, which is determined by the formula:
where: - δ - basic accuracy,%;
- N - number one - 0.02, 0.03, 0.3, 1c corresponding measurement time, and with 0.1 to 0.01;
- - The measured voltage;
- - Set a limit of measurement B.
Voltmeter V7-18 allow the basic error in the measurement of current and resistance, calculated by the formulas:
- By between 1 uA to 1 mA and from 1K to 0.1 MW,
- To within 10 mA and 10MOm,
where: - δ - basic accuracy,%;
- N - number one - 0,1, 2, 1c corresponding measurement time, and with 0.1 to 0.01;
- - The measured current or resistance;
- - Set a limit of measurement.
The device B7-18 with admissible repents basic frequency measurement error, calculated by the formula:
where - δ - basic accuracy,%;
- Δ with - relative error defined by varying the frequency of the internal reference oscillator frequency or frequencies introduced exemplary action;
- - The measured frequency;
- T - time measurements.
Etnos be discriminatory measure DC voltage, current and resistance served in Table 1.
The device V7-17 has an input impedance:
- When measuring DC voltage, no less - 100K on the limit of measurement of 0.1 V at the limit of measurement 1M 1B; 10MOm to within the measurement 10V and 1000V: 9MOm; at the limit of measurement 100V to the limit;
- Current measurement - no more than 10 Ohm at the limit of measurement 100mkL, 0.5 ohms at rest within a dimension;
- Frequency measurement - at least 50kOm with shunt capacity not exceeding 100 pF.
Voltmeters for V7-18:
- The burden of a measurement: 0.01 s, 0.1 B 1s.
- The burden in the zone; 0.05 ± 0,015 with; 0,2 ± 0,06 a; 0,5 ± 0 15; ± 0,5 s and 5 ± 2,5 s.
Time itself is warm and voltmeter:
- 2 hours for the frequency measurement;
- 1:00 in the measurement of DC voltage, current and resistance tion;
- 2 hours ace for DC measurements I, current, and of resistance at a relative humidity of 95% at 30 ° C.
Power consumption of the voltmeter does not exceed 100 tons in.
In measurements of the post oyannogo voltage and current devices V7-18 provide surge pom Laughter.:
- As a general form by constantly mu current, and the AC frequency of 50 well ± 0,5 Hz for at least 110dB;
- Serial form at a frequency of 50 Hz ± 0,5 at least 40 dB.
Devices V7-18 th t ime lifespan of at least 5,000 hours of aces. Mean time between failures - not less than 800 hours. Lifetime B7-18 - at least 5 years.
Operating conditions V7-18
Voltmeters V7-18 are designed for use in the following conditions:
- Ambient temperature - 15 ° C to 40 ° C;
- Relative Humidity - 95% at 30 ° C;
- Atmospheric pressure - 750 ± 30 mm Hg. Art.
Photos: V7-18 (B7-18)