Multimetru pentru tensiune regulator diodă
We usually use the regulator of the regulator is generally greater than 1.5V, and the pointer meter R × 1k below the resistance of the meter is powered by a 1.5V battery, so that R × 1k below the resistance of the measurement of the regulator tube as the measurement of the diode, has a complete unidirectional conductivity. But the pointer meter R × 10k file is powered by 9V or 15V battery, in the R × 10k voltage regulator value less than 9V or 15V regulator, the reverse resistance will not be ∞, but a certain resistance, but this resistance is still much higher than the forward resistance of the regulator. In this way, we can initially estimate the good and bad voltage regulator. However, a good voltage regulator to have an accurate value of the voltage regulator, amateur conditions how to estimate the value of the voltage regulator? Not difficult, and then go to find a pointer table on it. Method is: first a table placed in the R × 10k file, the black and red pens were connected to the cathode and anode of the regulator, which simulates the actual working state of the regulator, and then take another table placed in the voltage file V × 10V or V × 50V (according to the value of the regulator) on the red and black pens were connected to the table just now that the black and red pens, the measured voltage is basically the regulator's Regulated value. Said "basically", because the first table on the voltage regulator bias current relative to the normal use of the bias current is slightly smaller, so the measured value of the voltage regulator will be slightly larger, but the basic difference is not large. This method can only be used to estimate the regulated value of the regulator that is less than the voltage of the high-voltage battery of the pointer gauge. If the regulated value of the regulator is too high, it can only be measured by the method of the external power supply (so it seems that we are choosing the pointer meter, the choice of high-voltage battery voltage of 15V is more applicable than 9V).
