Pointer multimeter measuring battery voltage needle deformation how to repair
You need to open the front panel of the case and carefully straighten the hands. This is a delicate job that requires care, but it is not difficult. The pointer multimeter must have the red pen connected to the positive terminal and the black pen connected to the negative terminal. When measuring higher voltages, it's easy to bend the needle when the pens are reversed. Now the digital multimeter is also cheap, the pen is reversed just before the number of an additional negative sign. It is recommended that for those who are not familiar with the use of multimeter, directly buy a digital multimeter that does not need to change the range, the red and black pens are connected randomly, and will not burn the meter.
You only have to remove the back cover, and then remove the screws behind the panel, and then screw the needle total finger can be, it has a limit lever on both sides, the pointer is close to the right side of the limit lever and then move a small point to the right on the line, be sure to let the pointer point to 0 position.
Pointer multimeter using current, voltage gear without reverse protection, important things to say three times, otherwise the coil under the pointer is easy to overload burned, when you do not have the accessories will have to buy a new one.
I personally feel that the pointer meter to measure the tube, voltage are no problem, if you want to measure accurately, it is recommended to use a digital multimeter, this multimeter inside the inverse circuit, if your pen ride measurement point is reversed, but also will only show the negative measurement value, and then the minus ignored on the line.
When using the voltage gear to choose the correct, generally will not bend the needle. Have hands-on ability, you can restore the table pointer, repair, pay attention to the pointer balance. (Note: put the table body flat, upright, what changes in the side, which is the repair of the meter health), otherwise the meter will not be too correct.
