Tn-73 Pointer Vu Meter With Backlight Level Indicator Audio Spectrum High-precision Digital Power Meter as picture show

Balance: When the electric iridium is tilted 90 degrees back and forth relative to the standard position, the deviation between the position of the pointer and the center of the zero scale

Pointer sticking: Instantly add an overcurrent of three times the full scale current, and then slowly decrease to 1/2 of the full scale current after 7 seconds.

The needle may stick to the bottom due to different environmental temperatures, but the needle should return to the specified range