RVS28 28mm rvs28 potentiometer carbon film rotary potentiometer for welding machine
Rotary potentiometers can produce a linear or logarithmic output with tolerances of typically 10 to 20 percent. As they are mechanically controlled, they can be used to the measure the rotation of a shaft, but a single-turn rotary potentiometer normally offers less than 300 degrees of angular movement from minimum to maximum resistance. However, multi-turn potentiometers, called trimmers, are available that allow for a higher degree of rotational accuracy.
|Total rotation angel
|Measurement shall be made by the resistance between terminal R1and R3.
|Total Resistance tolerance
|Measurement shall be made by the resistance tolerance between terminal R1 and R3.
|Rated power is based on continuous full load operation at the maximum voltage between terminal R1 and R3.
|Test residual resistance beteen terminal R1 and R2; terminal R2 and R3
|R≤10KΩ R0≤20Ω 10KΩ<R≤100KΩ R0≤30Ω 100KΩ<R≤250KΩ
R0≤50Ω R≥250KΩ R0≤0.1%
|Rotation of noise
|The murmur will appear when shaft turn from terminal 1 to terminal 3 by 30 rounds/minute equably speed.
|Input more then one minute voltage between terminals and shell.
|Max. operation voltage
|Maximal voltage which sustained by terminal R1 and R3
|Potentiometer of the performance guarantee for the use ambient temperature
|Test voltage:DC 500V,
Test position: Between terminal and case
|After 10,000 rotation after the test, the changes impacted no more than ± (15% R +0.5 Ω) rotational noise of not more than 100 mv
|After welding (350℃, 3,5 seconds) after the of terminal contacts should be good, no termination loosening of
|Dip the terminals into tin tank at 235°C±5°C for 5±0.5 seconds, the soldering area should be more than 90%.