Level zero position calibrator (for metrological standard building)

One Product Introduction

SY-300B typeLevel zero position calibrator (for metrological standard building)This calibrator can be used to verify the zero position error of bar and frame level instruments, as well as adjust the installation zero position of level instrument bubbles. It meets the technical requirements of the calibration specifications for bar and frame level instruments, and has the advantages of high accuracy, strong stability, easy operation, and complete functions.

A spirit level is a tool for measuring small angles, mainly used to measure the tilt angle relative to the horizontal position. The correctness of the zero position of the level directly affects the accuracy of the measured angle. Therefore, in the calibration specifications of the level, zero position error is regarded as a major verification item.

IIstructural principle

Level zero position calibrator (for metrological standard building)It is mainly composed of components such as (1) support legs, (2) base, (3) zero adjustment worktable, (4) parallel level ruler, (5) semi cylindrical cushion rod, (6) flat core shaft, (7) positioning block, etc.

(1) The support foot is used to adjust the zero position deviation of the parallel ruler

(2) Install a parallel ruler in the middle of the base and a seat in the middle of the front

(3) Zero adjustment workbench. The workbench is adjusted at both ends with 3 M6 screws

(4) Horizontal and Vertical

(5) The semi cylindrical cushion rod is used to verify the zero position deviation of the bubbles on both sides of the working surface of the level and provide support

(6) The flat core shaft is used to verify the zero position deviation of the V-shaped groove under the level for bubbles, and can also be used to verify the zero position deviation of the V-shaped groove on the side of the level

(7) Positioning block is used for the level being tested

IIITechnical Specifications

(1) Measurement range: 150-300mm bar level;Frame level measuring 300 × 300mm and below.

(2) Adjust the flatness of the zero position workbench: 330 × 100mm meets the requirements of zero level flat plates.

(3) Accuracy of parallel ruler: flatness 0.6 μ m/300mm;Parallelism of 1 μ m/300mm.

(4) Accuracy of the core shaft: taper of 1 μ m/ф 36 × 300mm.

(5) Measurement variability of the entire machine: 2 μ m/m.

(6) Volume: 500 × 200 × 240mm.

(7) Weight: 32kg.

4Usage

1. Zero adjustment of bubbles in bar level and frame level

Place the inspected level against the two positioning blocks vertically and horizontally, so that one end of the bubble is tangent to the long engraved line. Then, convert the inspected level to 180 ° and observe whether the previous end was tangent to the long engraved line. If the tangency is within the allowable error range, it is qualified.

2. Zero position calibration of the lower plane of the level instrument

Firstly, check whether the horizontal working surface meets the technical requirements of the calibration specification. Then, place the level gauge tightly against the positioning on the zeroing workbench. After the bubble stabilizes, read the quantity at one end of the bubblea₁Then convert the level to 180 ° and accurately place it in its original position, and read a at the last end₂Take half of the difference between two readings, which is the zero position error δ of the lower plane of the tested level_{below zero}.

3. Zero position calibration of V-shaped groove under the level

Place the V-shaped groove under the tested level on the zero adjustment worktable of the SY-300B level zero position calibrator, and tilt the level around the core axis by ± 5 °. The movement of bubbles should not exceed 1/2 of the division value. Verify and process data in the same order as the plane under verification.

4. Zero position calibration on both sides of the level

Place the center of the lower plane of the level being inspected 5-10mm away from the parallel ruler on a cushion rod, and make its side working surface rest on the working surface of the parallel ruler. After the bubble stabilizes, read a according to one end of the bubble1Then convert the level to 180 °, place it against the other side of the parallel ruler, and take a at one end of the first reading2Take half of the difference between two readings as the zero position error of one side plane of the tested levelδ_{Zero side}The verification method on the other side is the same as that of the relative working surface.