Store of resistance R4830/2 (R 4830/2, R-4830/2, p4830 / 2, p 4830/2, p-4830/2)
Designed to operate in DC and AC frequency up to 50 kHz, as a measure of electrical resistance.
Resistance range from 0.1 Ohm to 122,222.1 Ohm
Size not more 490x135x365mm.
Accuracy class 0.05/2.5 x 10 ^-6

Store of resistance  R4830/2 (GOST 23737-79) are designed to operate in DC and AC
frequency up to 50 kHz as a measure of electrical resistance. Standard conditions for use store R4830/2:
ambient temperature (20 ± 2) ° C;
relative humidity 25 to 80%;
atmospheric pressure (84 - 106.7) kPa [(630 - 800) mm Hg].

Operating conditions store R4830/2:

ambient temperature (20 ± 10) ° C;
relative humidity from 25 to 80% in the working temperature range;
atmospheric pressure (84-106.7) kPa (630 - 800) mm Hg].

Technical characteristics

Accuracy class store R4830/2 0,05/2,5 • 10 ^-6. The range of values ​​reproducible resistance of 0.1 ohms 122222.1 steps of 0.1 ohms;
The average value of the initial resistance of the store R4830/2 (ie, the resistance to the installation of all the switches on the decadal zero reading) Ro, its variation ΔRo and OKP code correspond to the values ​​indicated in the table. 1.

Table 1.

Rated power dissipation of each stage of the decade "H10000Om" does not exceed 0,025 watts, "H100000Om" does not exceed 0.0025 watts.
Rated power dissipation of each stage of decades "H1Om" "H10Om", "H100Om", "H1000Om" does not exceed 0.25 W, "H0.1Om" - 0,025 W, "X0 01Om" - 0.0025 W, maximum power dissipation each stage of the decade "H100000Om" does not exceed 0,005 watts, "H10000Om" - 0.0 BT5, "H1000Om", "H100Om", "H10Om", "X0 01Om" - 0.5 W, "X0, the 1st" - 0, 05 Watts, "X0 01Om" -
0,005 watts.
Limit of acceptable deviation of the actual value of the resistance (b) as a percentage of the rated under normal conditions of use is determined by the formula (1), depending on the version:
δ1 = ± (0,05 + 2,5 · 10-5 (Rk/R-1)) (1)
where Rk - the highest resistance value store R4830/2 ohms;
R - the nominal value of a resistor in ohms.

The deviation of the actual value of the nominal impedance for initial verification (when it is shipped from the manufacturer) and the allowable change in resistance δ percent for the year (instability) does not exceed the value calculated by the formula (1) in the normal conditions of use, the steady-state thermal equilibrium and power dissipation at most nominal rated current store R4830/2 decades when the "X0, the 1st" and "X0 01Om" no more than 0.3 A.
The limit of additional error store R4830/2, caused by changes in ambient temperature between the upper (lower) limit the range of normal conditions of use and by some point in the related field of application of the operating temperature corresponding to the maximum change in resistance Rmax, numerically equal to the value determined by the formula ( 1).
The initial inductance and inductance store R4830/2 when the resistance less than 1 ohm (including primary inductance) through low-resistance terminals is less than 1 μH.
Limit the time constant τ store R4830/2, to the exclusion of primary inductance, and the screening with low-impedance output, do not exceed the values ​​shown in Table. 2 (for the resistance from 105 to 106 ohms τ is normalized at a power dissipation of 0.025 W).

Table 2.

The upper limit of the frequency range for each decade shop R4830/2 corresponds to the values ​​given in Table. 3.

Table 3.

If you enable more than one decade the upper limit of the frequency range should not exceed 20.00 kHz.
The limit of additional error store R4830/2, due to the change of frequency from zero to the upper limit of frequency range on the table. 3 (frequency error) at a power not greater than the nominal dispersion under normal conditions of use and in the steady heat balance does not exceed the values ​​defined by formula (1).
The insulation resistance between the case and isolated dc circuits store R4830/2 in the working conditions of application of not less than 2 • 109 ohms.
Insulation between the body and insulated from the housing dc circuits store R4830/2 in the working conditions of use stand for 1 minute test voltage of 2 kV AC 50 Hz.
Dimensions shop R4830/2, no more than 490h135h365 mm. Weight shop R4830 / 2, not more than 8,5 kg. The total content of non-ferrous materials in store R4830/2 is given in Table. 4.

Table 4.