Zero Adjustment of Frame Level Meter
Adjustment of the zero position of the adjustable frame level on the cast iron platform, during the process of using the level;
If it is found that the gap between the bubble and the central position exceeds 1/4 of the graduation value (that is, when the level is turned 180 degrees, the difference between the two readings before and after exceeds 1/2 of the graduation value);
Then the zero position of the level meter is out of tolerance, and the zero position must be adjusted urgently.
Different models of zero adjustment devices have different zero adjustment methods.
The axis of the welded plate water preparation bubble is parallel to the bottom surface of the level, that is, the bottom surface of the level is also in a horizontal position
The mediation method of zero position is as follows
The flat task surface is in a horizontal position, that is, the natural water level
The zero position of the frame level must be satisfied with the following three points:
The middle of the bubble is exactly tangent to the two long scribe lines
Adjustment of the bubble length, when the frame type is adjustable, the bubble length is adjustable;
Before use, check whether the length of the bubble is equal to the distance between the two long scribe lines, if the lengths of the two are different;
It is necessary to reverse the height of the level by 180 degrees, and raise or lower one end of the compensated air chamber (the longer the bubble is, the higher it is, and the shorter the bubble is, it is lowered);
Simply shake the level directly to make the bubble shrink or stretch until the middle of the bubble is exactly tangent to the two long scribe lines.
