Microamp Millivoltmeter recording Voltmeter ammeter USSR Polygraph new

Description

Designed to measure and record current and voltage values ​​in DC circuits. The limit of permissible basic error in measuring and recording the measured value is ± 1.5% of the final value of the measurement range. Overall dimensions 230x180x315mm. Portable microamperillivoltmeters Н399 (hereinafter referred to as instruments) are used for measuring and recording current and voltage values ​​in direct current circuits. The operating conditions of the device are ambient temperature from 0 to 50 ° С, relative air humidity up to 80% at a temperature of 25 ° С. Н399 microampermillivoltmeters supplied to tropical climatic areas are designed to operate at an ambient temperature of 10 to 45 ° С and relative humidity up to 95% at a temperature of 40 ° С and indoors without sharp changes in temperature, exposure to solar radiation, rain and dust . Perhaps the action of molds and other biological factors. In this case, the factory designation of the device must be supplemented with lettersundefined "04.2". Technical data The margin of permissible basic error in measuring and recording the measured value is ± 1.5% of the final value of the measuring range - for instruments with a zero mark at the edge of the range and of the sum of the final values ​​of the measuring range - for instruments with a zero mark within the measuring range. Final values ​​of measuring ranges: 1mV; 5mV; 10mV; 25mV; 50mV; 75mV; 250mV; 1B; 2.5V; 5V: 10V; 25V; 50V; 100V; 10; fifty; 250 μA. Note. By agreement with the manufacturer, a self-recording Microamperillivoltmeter Н399 / 1 is made on special order with the following final values ​​of the measurement ranges: 5mV; 10mV; 25mV; 50mV; 100mV; 5mkA; 10 μA; 25μA; 50 μA; 100 μA; 10B.
External resistance in the measurement ranges with upper limits from 1mV to 250mV, at which the dynamic properties of the H399 device (quieting, transfer) are guaranteed, no more than 10kOhm External resistance values ​​(R ext) in the measurement ranges with upper limits from 1V to 100V on undefined dynamic properties of the device do not affect. The margin of error of the device for recording time ± 0.5%. The limit of permissible total error of devices for recording the measured value is ± 1.5%. The total error is expressed in the same way as the basic error. The limit of permissible error of the H399 instrument for measuring and recording the measured value caused by a change in the position of the instrument from the normal position in any direction by ± 5 ° is equal to the limit of the permissible basic error. The limit of permissible additional error of the device caused by a change in the supply voltage by ± 10% of the nominal value or the frequency of the supply network by ± 2% of the nominal value is equal to half the value of the limit of the permissible basic error. The limit of permissible additional error of the H399 instruments for measuring and recording the measured value under the influence of an external constant uniform magnetic field with induction of 0.5 mT with the most unfavorable direction of the magnetic field is ± 0.5%. undefined The limit of the permissible additional error of the devices, caused by the installation on a ferromagnetic base with a thickness of (2 +0.5) mm, is equal to half the limit of the permissible basic error. The limit of permissible additional error of the device Microamperillivoltmeter self-recording N399, due to the influence of the same device placed next to it, previously located at a distance of at least 1 m, is ± 0.5%. The limit of the permissible additional error of the H399 instruments for measuring and recording the measured value caused by a change in ambient temperature from normal to any temperature in the range from 0 to 50 ° C is ± 1% for every 10 ° C of temperature change. The insulation between the body of the device and all DC circuits isolated (except for the measuring circuit) can withstand for 1 minute under normal conditions of use. the effect of a test voltage of alternating current with a frequency of 50 Hz, the effective value of which: 2kV - between the network connector and undefined body; 0.5 kV - between the terminals of the timer and the housing; 0.5 kV - between the power terminals from the DC source and the housing. The insulation between separate electrical circuits (except for the measuring circuit), isolated from each other by direct current, withstands normal test conditions, withstands the test voltage: 2kV - between the mains connector and the terminals of the timer; 0.5 kV - between the terminals of the timer and the power terminals from the DC source. Insulation resistance between the housing and DC isolated from the housing by any electrical circuit of the H399 device, except for the measuring one, under normal conditions of use of at least 40 MΩ. The settling time of the moving part of the device does not exceed 2 s. The value of the first flip of the pointer does not exceed 7% of the width of the recording field. The time for establishing the operating mode (self-heating time) is 15 minutes. The readings are recorded in ink on a chart tape in rectangular coordinates. Amount of ink to fit undefined in the ink tank, provides continuous recording of readings on the chart tape for at least 30 days. The width of the working part of the chart tape is 100 mm. The length of the chart tape is not less than 15m. The reading of the readings on the chart tape is carried out using a scale ruler, on which the same marks are applied as on the scale of the H399 device. A synchronous motor powered by AC frequency is used to drive the chart tape.
50Hz, voltage 220V or from a DC source voltage of 12 V through a separate converter P39, supplied on request. The self-recording microamperillivoltmeter H399 has seven speeds for moving the chart tape: 20; 60; 180; 600; 1200; 1800; 5400 mm / h, which are installed by changing a pair of gears. The overall dimensions of the devices are 230x180x315 mm. The mass of the device is not more than 9.0 kg. undefined
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