Metal Wire Gauge Company

NegotiableUpdate on 05/12

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

A third class metal line ruler is a precision engraved metal ruler with a reading magnifying glass and a thermometer. In surveying and mapping operations, it is commonly used to check the distance between contour points, control points, and coordinate network points. It is specified in the national leveling measurement standards as a standard ruler for calibrating leveling scales. Other professional departments are also widely used for measuring and measuring straight-line distances and markings.

Product Details

1、 Performance indicators and usage conditions
1. The third class metal line ruler is used to verify the indication error of steel plate rulers.
2. Third class metal wire ruler measuring range (0-1000) mm
Instrument division value: 0.2mm
Instrument indication error: ± 0.05mm
3. The instrument should be used in a clean, vibration free, room temperature requirement (20 ± 5) ℃, and relative humidity<65% RH constant temperature room.

2、 Technical parameters:

1. Instrument dimensions: 1050mm in length, 38mm in width, and 63mm in height
2. Instrument weight: 3Kg
3. Wooden box size: 1080mm in length, 74mm in width, and 82mm in height
4. Full set weight: approximately 5.5Kg
5. The division length of the meter ruler is 1020mm
6. The division value of the meter ruler: the two inclined surfaces are 1mm and 0.2mm respectively (can be estimated to read up to 0.01mm)
7. Magnifying power of magnifying glass: 7x
8. Scale division value of thermometer: 0.5 degrees
9. The straightness of the inclined edge of the meter ruler is ≤ 0.1

10. The engraving accuracy of the instrument: (divided according to the size of the engraving spacing)

2、 Operation steps
1. Before use, check if all parts of the metal wire ruler are intact.
2. Take out the third class metal wire ruler from the packaging box (note: do not touch the ruler with your hands). Place it on a flat plate and keep it isothermal with the tested object.
3. Place the engraved line of the test piece on the same plane as the engraved line surface of the metal standard line ruler.
4. Align the end face of the test piece's engraved line with the end face of the metal standard line ruler's engraved line.
5. Align the tested component with the longitudinal direction of the standard metal wire ruler.
6. Use the magnifying glass on the standard ruler to read the difference between the distance between the standard ruler's engraved lines and the distance between the inspected ruler's engraved lines.
7. After verification, clean with 120 # gasoline, dry and place in the box.

As a high-tech and innovative new product of the 21st century with independent intellectual property rights in China, the third class standard metal line ruler integrates modern technology and fully automated manufacturing process technology of machining centers. It adopts laser engraving, marking, reading and pattern making. The product has high precision, high stability, and high clarity. The engraved line width and spacing jz are consistent, and the difference shows a linear curve rise and fall without sudden jumps or accidental errors in peaks and valleys. The engraved line is vertical to the standard, the ruler has good stiffness, low deformation rate, and good flatness. All precision indicators are significantly higher than the JJG71-2005 standard issued in 2005, and it has xj level.

Third class standard metal wire ruler, also known as standard metal wire ruler, third class metal wire ruler, metal wire ruler, wire right angle ruler, wire steel right angle ruler, Geneva ruler