Measure of resistance R4018 (R 4018, R-4018, p 4018, p4018, p-4018)
Measures resistance R4018 are designed to work in DC and AC currents as model workers and measures the electrical resistance in the working conditions of use:
ambient temperature (20 ± 5) ° C, relative humidity of 25 to 80%, atmospheric pressure 84-106.7 kPa (630-800 mm Hg. cent.). Climatic performance UHL4.1 GOST 15150-69, but for an ambient temperature of (20 ± 5) ° C.
Measure of resistance R4018 refers to the non-renewable, one-channel, monofunctional products.
Main parameters and codes R4018 OCP measures shown in Table 1. Dimensions measures R4018, mm, not more than 115x125x260. Mass action, kg, not more than 1.8.
The permissible deviation of the actual value of the resistance measures R4018 from the nominal value in the normal conditions of use at nominal voltage (power) for initial verification (on leaving the manufacturer) does not exceed ± 0,005%.
Normal conditions of use:
ambient temperature (20 ± 0,5) ° C (293 ± 0.5) R; relative humidity from 25 to 80% atmospheric air pressure 84-106.7 kPa (630-800 mm Hg) Allowable resistance change measures as a percentage for the year (annual volatility) does not exceed ± 0,005.
Limit values for the time constant τ when measures R4018 trehzazhimnom inclusions at the upper limit of the frequency range of 1000 Hz correspond to those in Table 1. The limit of additional error measures when working on alternating current caused by the change in frequency from zero to the upper limit of the frequency range of 1000 Hz (1592Gts) (frequency error), with trehzazhimnom inclusion in absolute value does not exceed 0.5%.
The limit of additional error measures R4018 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 does not exceed ± 0,005%.
At any given temperature within the operating conditions of use described above, the deviation of the actual value measures the resistance values of the resistance R t at a temperature of t ° C as defined under the formula (1), expressed as a percentage of the nominal value, with the nominal power (voltage) does not exceed ± 0,002:
R t + ... [... June 10 (t -20) + .... ten -6 (t -20) 2] Ohm (1)
The limit of additional error R4018 measures as a percentage of the nominal value does not exceed ± 0,005 when the voltage from nominal to any value that does not exceed the maximum on Table 1, under normal conditions of use, and the steady-state thermal equilibrium.
The insulation between the casing and insulated from the housing of DC circuits measures stand for 1 min. Test voltage of AC 50 Hz current value is equal to 1.5 kV or the DC voltage value equal to the amplitude of the alternating test voltage.
Riso Insulation resistance in ohms between the casing and the screen and between the screen and the isolated DC circuits working in the conditions of use described above is not less than the values shown in Table 1. Rate of mean time to failure should be at least 2500 W in the working conditions of use. Full average life measures R4018 at least 10 years of age. Installed trouble-free working hours - 2000 hours in the working conditions of use. The silver - 0.06 g of palladium - 0.0128 g