DQL-8 Geological CompHigh-Precision Damping Anti-Magnetic

DQL-8 Geological Compa High-Precision Damping Anti-Magnetic

[Specifications]: 1.*Dial: 0 ° to 360 °, : 1 °; *Azimuth dial: outer calibration instructions for slope (two-way 45 ° slope Angle of tangent ), the lattice : 0.05; *Inner ring calibration instructions for two-way 90 ° slope Angle, unit: degree; : 1 °. 2.Magnetic damping time (needle deflection 90 ° to stay in the original position of the time) is le than 15 seconds; 3.Reading error: A. magnetic rotation before and after the indicated the degree of error is not more than 0.5 °; B. needle on a scale of 0-180 ° 180 °, 90 - caused by eccentric error is not more than 0.5 °; C. goniometer reading error is not greater than 0.5 °. 4.Sensitivity level: A. long level for 15'±3'/2mm B. circular bubble for 30'±5'/2mm 5.Size:80x70x35mm 6.Net weight:0.29kg Magnetic Declination: Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Declination is considered positive east of true north and negative when west. For more information, please see : ngdc.noaa If the compa needle points east or west of the true north, the offset is called east or west declination, respectively. The standard is to use the magnetic north (MN) as a reference for declination, even in the southern hemisphere. For more information, please see : Geology in the Field by Robert R. Compton (Jul 1985) Estimated of Magnetic Declination: Declination is calculated using the current World Magnetic Model (WMM) or the International Geomagnetic Reference Field (IGRF) model. Declination results are typically accurate to 30 minutes of arc, but users should be aware that several envmental factors can cause disturbances in the magnetic field. For more information, please see : ngdc.noaa Setting The Declination: Geologists use the compa for mapping and measuring linear and planar objects. The magnetic declination is set by turning the bra screw on the side of the compa box. For more information, please see : Geology in the Field by Robert R. Compton (Jul 1985) [How to use]: One: The occurrence (including towards, orientation, Angle) 1.Measure move towards:To the dike on the horizontal projection direction. Open the instrument on the cover to the limit position, adjusted the magnetic declination in the region, the instrument two long edges on the characteristics of the rock surface (the typical surface), keep centered round blisters, reads the degree, indicated by the magnetic North Pole is the rock. 2.Measure tendency:The direction perpendicular to the direction indicated. With link at the bottom of the hinge on the chais of the short side or the back of the cover of the anchored rock characteristics of the surface, keep centered round blisters, reads the degree, indicated by the magnetic North Pole is the tendency of rock. 3.Measure inclination:Perpendicular to the direction of horizontal Angle Angle. Open the cover to the limit position, the side of the instrument perpendicular to the direction and with the characteristics of the rock face, the bubble in the middle and long read pointer refers to the steering wheel, the degree is the dip Angle of strata. Notice:In actual measurement, the trend and tendency of the two factors, one can simply test, because the trend and tendency is 90 ° relationship each other. Two: Terrain sketch survey (including bearing, slope Angle, horizontal line) 1.Make cardinal direction:Target's direction and position. Bearing is also called the intersection point. (1) when the target above the line of sight (horizontal) measurement method. *Right hand clenched instruments, cover the back towards the observer, the arm against the body, to reduce jitter, adjust the diopter and left hand mirror, turn the body, make the goal, like at the same time of sighting a long mirror, and divide by mirror line, keep centered round blisters, reads the degree, indicated by the magnetic North Pole is the target's direction. *According to the same method, to measure the goal in another point, these two point to the measurement of the same target two line along the measure of the degree, meet in the goal, it is concluded that the location of the object. (2) when the target under the line of sight (horizontal) measurement method. *Right hand instruments, mirror acro from the observer, the arm against the body, also in order to reduce jitter. Adjust the diopter and left hand on the cover, turn the body, make the goal, sighting, pointed at the same time into the mirror of the elliptical hole, and divide by mirror line, keep the center circle blisters, and then read the degree, indicated by the magnetic North Pole is the target's direction. *According to the same way, in another point of the target is measured. This measure from two points of the target, it is concluded that the two line along the measure of the degree, meet in the goal, it is concluded that the location of the object. 2.Measure slope Angle:Objective to observer and horizontal plane Angle. Right hand holding the instrument shell and chais, long diopter in the observer, the instrument plane perpendicular to the horizontal plane, long blisters in the be. The left hand adjust the cover and diopter long, make the hole at the same time of targets, sighting, pointed to mirror the elliptical hole split the scribed line. Then adjust the hand right hand middle finger, watch from the mirror long bubble in the middle and the dial on the wheel the indicated degree, is the goal of slope Angle. If a certain slope surface slope Angle measurement, simply open the cover to the limit position, the instrument side directly on the slope surface, adjusting the long blisters in the middle and the Angle, namely for the slope surface slope Angle (the same as the occurrence of measuring Angle). 3.Fixed horizontal line: The diopter long pull to the box surface into a plane, cover pull to 90 °, and sighting pointed vertical, parallel cover, the indicator "0", by sighting pointed on the apparent holes and mirrors the line of sight of elliptical hole, is the horizon. Three: Measure vertical Angle of object: Turn on the cover to limit position, with instruments side against objects (such as drill rod) representative of the plane, then the blisters in the middle and long indicator readings at this time, is the vertical Angle of the object. [Notes]: 1. Thimble, agate and needle bearing is one of the main equipment parts, should be carefully protected, clean, lest affect the sensitivity of needle. Need not when, should be the instrument to fasten. Instrument when closed, through the switch and shifter lever moves the needle will be automatically raised, make thimble and agate bearing out, lest worn thimble. 2.Do not easily remove all hinges, lest loose and affect accuracy. 3.Instrument to avoid high temperature exposure to avoid blisters leakage failure. 4.Hinge rotating part often should order some watch oil so as to avoid dry grinding and broken. 5.When not in use for a long period of time, should be placed in ventilated, dry place, avoid mildew. Notice:Once you buy Magnetic products ,I will send your addre country.(If not,pls inform me which country you want to use.) Because every region of the needle is not the same as the counterweight position.

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