Nantong Shunhui Electronic Technology Co., Ltd

Use of level gauge and precautions

Published:

2023-03-03

The scale value of the level gauge is expressed in terms of angle (seconds) or slope, which means the angle at which the bubble is offset by one grid of work tilt, or the height at which the bubble is offset by one grid of work surface tilt over a length of one meter. Due to the small inclination angle of the level used, tg, such as tg4 4 radian=0.02mm/1000mm, should be measured so that the working surface of the level is close to the surface being measured, and readings can only be taken after the bubbles stabilize. If it is necessary to measure the actual inclination value with a length of L, it can be calculated using the following formula. Actual inclination value=nominal graduation value L deviation grid number; For example, if the nominal graduation value is 0.02mm/m, L=200mm, and the number of deviation grids is 2, the actual inclination value=0.02/1000 * 200 * 2=0.008mm. To avoid measurement errors caused by inaccurate zero position of the level, it is necessary to check or adjust the zero position of the level before use.

usage method

The method for checking and adjusting the zero position of the level gauge is to place the level gauge to be calibrated on a roughly horizontal flat plate, close to the positioning block, and after the bubble stabilizes, read a1 at one end of the bubble. Then, turn the level gauge 180 degrees and accurately place it in its original position. Record the reading at the other end of the bubble as a2 based on the first reading. Half of the difference between the two readings is the zero position error, i.e.=(a1-a2)/2 grid. If the zero position error exceeds the allowable range, it is necessary to adjust the zero position mechanism, as shown in Figure 1. The requirement can be met by repeatedly adjusting the screw 1.

matters needing attention

The level gauge is a measuring tool with strict packaging requirements. Each level gauge shall be packed in a shockproof box made of foam material, coated with anti rust oil and placed in a plastic bag before packaging. The shockproof box is then packed in a strong cardboard or wooden box with the specified markings painted on the outside. The level meter should be stored in a dry, ventilated, non corrosive gas warehouse. Strictly prevent falling, collision and rain during transportation.

A level gauge is an angle measuring instrument that measures the angle of inclination away from the horizontal plane. The inner surface of the main bubble tube, the key part of the level, has been polished. The outer surface of the bubble tube is engraved with a scale, and the interior is filled with liquid and bubbles. The main bubble tube is equipped with a bubble chamber for adjusting the length of the bubbles. The bubble tube is always horizontal to the bottom surface, but it is likely to change during use. Therefore, adjustment screws are provided.

1、 Before measuring, the measuring surface should be carefully cleaned and wiped dry, and checked for defects such as scratches, rust, and burrs.

2、 Check whether the zero position is correct. If not, adjust the adjustable level as follows: Place the level on a flat plate and read the scale of the bubble tube. At this time, at the same position on the flat plate, reverse the level to the left and right by 180 °, and then read the scale of the bubble tube. If the readings are the same, the bottom surface of the level gauge is parallel to the bubble tube. If the readings are inconsistent, use a spare adjustment needle, insert it into the adjustment hole, and adjust it up and down.

3、 During measurement, the influence of temperature should be avoided as much as possible. The liquid in the level gauge has a significant impact on temperature, so attention should be paid to the impact of factors such as hand heat, direct sunlight, and bad breath on the level gauge.

4、 During use, readings should be taken at the position of the vertical level to reduce the impact of parallax on the measurement results.