Creamy Coconut Flavoured Candy High Grade Optical Compass

Item: Specification
Model No.: DQL-8
Damping Time: <15 minutes
azimuth: +/- 1/2E w/ 1E graduations
internal clinometer: +/- 1/2E w/ 1E graduations
percent grade: 5% graduations
declination adjustment: +/- 180E
Precision long air level: 15A'A 3'/2mm
Precision of circle air Level : 30A'A 5'/2mm
dimensions: 80*70*35mm
weight:240g
Packingin leather case and paper box

How to adjust the magnetic declination of a compass? Harbin DQL-8 Geological Compass gives you the gadget

Xiao Meng, a Geological engineering major student, used Harbin DQL-8 geological compass in his field exploration course. Meng found using a compass is not easy as a geological hammer or a magnifying glass. Due to negligence, he forgot to adjust the magnetic declination, this caused reading recorded deviated from the correct azimuth. How do we adjust the magnetic declination of a geological compass?

Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Declination is positive east of true north and negative when west. Magnetic declination changes over time and with location. As the compass points with local magnetic fields, declination value is needed to obtain true north. When calibrating, the scale screw of the compass can be rotated to make the horizontal dial turn to the left or right, so that the angle between the north-south scale of the compass chassis and the horizontal dial 0-180 degrees is equal to the magnetic declination. The reading when measured after correction will be the true azimuth.

By consulting his teacher and reading the World Magnetic Model (WMM) , Meng found out that the local magnetic declination was 2A 30' to the west. Harbin DQL-8 geological compass comes with a key-shaped gadget in the package, and the magnetic declination adjustment axis is set on the side of the case, so that the reading is accurate when adjusted to the regional magnetic declination value. As Meng completed this assignment, he also learned about how to use geological compass, as well as how to adjust magnetic declination.

Harbin has 55 years of production experience of geological compass , the factory uses German CNC equipment, the magnetic needle is made of rare earth permanent magnetic material to prevent demagnetisation, and worders are experienced. The directional indication reading error of Harbin geological compass is less than 0.5 degrees. Damping time less than 15seconds.

Harbin DQL-8 geological compass, gives you the gadget to adjust magnetic declination, so you will get correct amizuth.