Measure of electrical resistance R3026
Also this device can be called: R 3026, R-3026, R30-26, R30 26, P3026, P 3026, P-3026.
R3026 measure of the electrical resistance multi-valued intended for use as a control measure resistance in DC circuits.
Measures R3026 presented modifications R3026-1 and R3026 -2.
Class of accuracy:
- R3026-1 - 0,002;
- R3026-2 - 0,005.
Measures provide the resistance value with 7 decades of 0.01 Ohm to 111111.1 Ohm.
- 1 decade - 10×10 000 Ohm;
- 2 decade - 10×1000 Ohm;
- 3 decade - 10×100 Ohm;
- 4 decade - 10×10 Ohm;
- 5 decade - 10×1 Ohm;
- 6 decade - 10×0,1 Ohm;
- 7 decade - 10×0,01 Ohm.
Resistance level - from 10 000 Ohms to 1 Ohm.
Power dissipation on stage from 1 to 5 decades of measures of accuracy class 0.002:
- nominal - 0.005 W;
- max - 0.02 W.
Power dissipation on stage from 1 to 5 decades of measures of accuracy class 0.005:
- nominal - 0.01 W;
- max - 0.05 W.
Power dissipation for decades 10×0,1 and 10×0,01 measures of all classes of accuracy:
- nominal - 0.01 W;
- max - 0.1W.
Resistance to install all the switches on the decadal zero readings measured with clamps 111111.1 Ohm - not more than 0.01 Ohm.
Variation of the initial resistance - not more than 0.01 Ohm.
Thermocontact EMF measuring circuit measures the unloaded under normal conditions of use and installation of all zeros for decades - not more than 5 mV.
Normalized values of insulation resistance and dielectric strength are shown in the table below:
Limit of acceptable deviation of the actual value of the resistance measure, expressed as a percentage of nominal - less than ±(0,01+1,5·10-6·(111111,1/R-1)), where R - the nominal value of a resistor.
Instability R3026 per year:
- for R3026-1 - not more than ±(0,002+1,5·10-6·(111111,1/R-1))%;
- for R3026-2 - not more than ±(0,005+1,5·10-6·(111111,1/R-1))%.
Maximum permissible additional error, expressed as a percentage of the nominal value of a resistor, a change of the nominal power dissipation to any value that does not exceed the maximum power under normal conditions of use and the establishment of thermal equilibrium state is the value of instability for the year.
Maximum permissible additional error caused by changes in ambient temperature between the upper (lower) limit the range of normal conditions of use and the upper (lower) value of the operating temperature applications, numerically equal to the value of instability for the year.
Dimensions - 485×250×240 mm.
Weight R3026 - not more than 11 kg.
Operating conditions R3026:
- ambient temperature - (20±0,5)° C;
- relative humidity - 60±20%.
- ambient temperature for R3026-1 - (20±2)° C;
- ambient temperature for R3026-2 - (20±5)° C;
- relative humidity in the working temperature range of - 25% to 80%.
Photos: R3026 (P3026)