Use of the ohms stop of the multimeter
I. Select the appropriate multiplier. When measuring resistance in the ohmmeter, the appropriate multiplier should be selected so that the pointer indicates near the median value. It is best not to use the left third of the scale, this part of the scale is very poor intensive.
Second, to zero before use.
Third, can not be charged measurement.
Fourth, the measured resistance can not have parallel branches.
Fifth, the measurement of transistors, electrolytic capacitors and other polar components of the equivalent resistance, must pay attention to the polarity of the two pens.
Sixth, with a multimeter with different multiplication of the ohm block to measure the equivalent resistance of non-linear components, the measured resistance value is not the same. This is due to the median resistance and fullness current of each block is different caused by the mechanical table, generally the smaller the multiplier, the smaller the measured resistance value.
When measuring DC with multimeter
Zero the meter mechanically.
Choose the appropriate range gear.
When measuring current, the multimeter should be connected in series in the circuit to be measured, because only the series connection can make the current flowing through the ammeter be the same as the current of the branch to be measured. Measurement, should be disconnected from the measured branch circuit, the multimeter red and black pens connected in series between the two points of the quilt disconnected. Special attention should be paid to the current transcription can be connected in parallel in the quilt measurement circuit, it is very dangerous to do so, very easy to make the multimeter burned.
Fourth, pay attention to the measured power polarity.
Fifth, the correct use of scale and read.
Sixth, elected to take the DC current 2.5A block, the multimeter red pen should be inserted in the 2.5A measurement jack, range switch can be placed on the DC current block of any range.
If the DC current measured by the quilt is greater than 2.5A, the 2.5A block can be extended to 5A block. Method is very simple, the user can be in the "2.5A" jack and the black pen jack access to a 0.24 ohm resistor, so that the block has become a 5A current block. Access to the 0.24A resistor should be selected with more than 2W wirewound resistor, if the power is too small will make it burn.
