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With a multimeter test capacitance

by:SMiLer     2021-02-12
With a multimeter test whose hands the size of the deflection of capacitance is different also, it will need to be equipped with every meters only one form, examine each one capacitor list is the number whose hands up in the second hour online deflection. By allowing the capacitance of capacitor has certain error, the corresponding rules out the scope of the number plus or minus. Such as 10 + 2, i. e. , 8 ~ 12 within the scope of all qualified. And inspection electrolytic capacitor, whose hands after the deflection to the maximum level, don't immediately disconnect, whose hands back to wait, for small capacity capacitor, whose hands should be returned to the starting point. Otherwise because of the leakage is too big, and not qualified. Operating procedures are as follows: 1. Using the multimeter, first gear knob screw to x 1 k 'R' gear, double sum of sub zero. 2. Less than or equal to 2000 pf capacitor should be inserted into the spring 1, 2, and in turn one by one inspection, this is the first group. More than 2000 pf capacitor should be inserted into the spring 2, 3, in turn one by one inspection, this is the second group. 3. One of the first group of capacitor inserted after 1, 2, using a multimeter black pen first contact spring 1, this is the capacitor discharge, in order to make sure it at the time of inspection in the initial state of 'not charging'. And then will contact 2 black pen, whose hands deflection at this moment, to return after the biggest Angle. ( 1) Look at maximum Angle in the second hour online has a few little, DuiZhaoBen multimeter with form the number listed ( See table 2) 。 If the difference in the number plus or minus within the scope of is qualified. If out of range, is not qualified. ( 2) Look at the clock can return to the starting point, back to the starting point for qualified. 4. The second group of 2, 3: (one capacitor inserted 1) Using a multimeter black pen first contact spring 3, discharge the capacitor. Then black pen contact 2 test, look at the clock deflection largest, is in line with the number listed in table 2, The second line little) 。 ( 2) Look at the clock can return back to the starting point, back to the starting point for the leakage is serious, not qualified.
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