Instruction Manual for the YHL90360S(C) Intrinsically Safe Electronic Geological Compass for Mining

YHL90/360S(C)

Intrinsically Safe Electronic Geological Compass for Mining

Instruction Manual

(Please read this manual carefully before debugging or using the product.)

Product Implementation Standard: Q/HGY34-2025

MT209-1990 (excluding anti-interference and reliability)

                 GB/T 3836.1-2021, GB/T 3836.4-2021    

Safety Certification Number: MAK200060

Explosion-proof certificate number: CMExC25.4611 

Harbin Optical Instruments Factory Co., Ltd.

Safety Warning

Please read this manual carefully before debugging, operating, or maintaining this instrument.

• During operation and maintenance, all relevant provisions of this manual must be strictly followed.

• On-site ancillary products subject to safety mark control and management must obtain a safety mark. The same requirement applies if such products are replaced during use.

• This instrument Charging is permitted only in safe, above-ground locations! Charging is prohibited in underground mine areas.

• This instrument The use of other batteries is not permitted.

• During maintenance, the model and specifications of intrinsically safe components and components related to intrinsically safe systems must not be altered.

• This instrument Complies with GB 3836.1-2021 and GB 3836.4-2021 In accordance with the relevant regulations, it has undergone explosion-proof inspection by a state-authorized explosion-proof testing institution and has obtained the Safety Mark Certificate for Coal-Mine Products.

Danger: Indicates that extreme caution is required. Failure to heed these instructions may result in incomplete test data or severe damage to the instrument due to improper operation.

Warning: Indicates moderate hazard—exercise caution. Failure to heed these instructions may result in equipment damage due to improper instrument operation.

Note: Indicates that mild hazards require attention. For example: Failure to charge in strict accordance with the charging requirements may result in significant danger!

Only qualified personnel are permitted to install and operate this instrument. In this manual, “qualified personnel” refers to individuals who have been authorized to use and maintain the equipment in accordance with applicable safety regulations and standards.

Thank you for purchasing products from Harbin Optical Instruments Factory Co., Ltd. To ensure safe use and optimal performance, please read the instruction manual carefully before using the product. The factory reserves the right of final interpretation of the terms in the instruction manual and will not provide separate notice when changes are made to the manual.

Warning: This product shall not be repaired or have its components replaced without the manufacturer’s authorization; the manufacturer shall not be liable for any consequences arising therefrom.

Precautions:

1. A compass is an instrument that uses magnetic fields to determine direction. However, it cannot reliably and in real time distinguish between external interfering magnetic fields and the Earth’s magnetic field. Therefore, providing a low-interference magnetic environment during operation is crucial for maintaining the compass’s accuracy; in complex ambient magnetic fields, the accuracy of the compass’s measurement data can be compromised.
2. Strong ambient light degrades the ranging accuracy of the instrument.
3. Do not aim the laser emitted by this product at the human eye to avoid eye injury.

Data meaning:

Azimuth ： It is the horizontal angle measured clockwise from the north direction line at a given point to the target direction line.

Roll angle : The instrument is placed horizontally in the forward position; when the instrument is tilted from side to side, the angle formed between the lower surface of the instrument and the horizontal plane. 。

Pitch angle : The instrument is placed horizontally in the forward direction; when the instrument is tilted back and forth, the angle formed between its lower surface and the horizontal plane. 。

Magnetic declination : The angle of deviation between geographic azimuth and magnetic azimuth; the magnetic declination varies depending on the geographic location.

Temperature and humidity : Ambient temperature and humidity of the instrument 。

flow   quantity : Given the dimensions of the flume, flow rate is calculated using the float method.

face   Accumulation : Measure the area of a rectangle using the method of distance measurement.

body   Accumulation : Measure the volume of a cube using the method of distance measurement.

• Application Fields

This product is an intrinsically safe instrument for measuring parameters such as azimuth, distance, and inclination. It is primarily used for underground geological exploration but can also be applied in forestry, water conservancy, power, and other fields.

II. Product Features

Electronic compass: Utilizes high-precision attitude sensors and advanced software algorithms for more accurate attitude measurement.

Inclination Compensation: When measuring azimuth, the compass does not need to be placed horizontally to obtain accurate readings.

Data Hold: After aiming at the target, press the Hold button to lock the current reading for easy reading.

Laser Projection: The instrument can project either dot or line lasers, making aiming more convenient.

Laser measurement: phase-based laser ranging, measurement range 80 Meter-level accuracy, with millimeter precision, and capable of measuring height, area, and volume.

Data Storage: Stores 400 data sets, indexed by time, and can be viewed locally.

Data Communication: Pass Upload measurement data via USB or Bluetooth, or operate the instrument via Bluetooth.

III. Operating Principle and Parameters

3.1 Operating Principle

This product is a portable, intrinsically safe electronic geological distance-measuring compass. At its core is a high-speed processor, supported by a sensor suite comprising a 3-axis magnetoresistive sensor, a 3-axis accelerometer, and a 3-axis gyroscope for attitude measurement. This sensor suite provides the instrument with three-dimensional attitude data, which is then processed to determine azimuth and dip angle. In addition, the instrument is equipped with point-and-line laser sighting, laser ranging, temperature and humidity measurement, and float-based flow measurement capabilities.

3.2 Technical Parameters

* Strong magnetic interference in the working environment or the presence of an unstable magnetic field can lead to significant measurement errors.

IV. Exterior Structural Diagram

4.1 Dimensions and Weight:

External dimensions: 139 mm × 83 mm × 44 mm

Weight: 350g

4.2. Appearance and Structure:

V. Product Classification and Naming

5.1 Explosion-proof type: Intrinsically safe for mining use, marked: Exib   I Mb

5.2 Product Model:   

VI. Environmental Conditions

6.1. Working Environment Conditions:

Ambient temperature: 0°C to +40°C; relative humidity: ≤95% (at +25°C); atmospheric pressure: 86–106 kPa; environment free from corrosive gases that can damage metals or insulating materials; in underground coal mines, an explosive mixture of methane and coal dust is present.

6.2 Storage and Transportation Conditions:

Ambient temperature: -40°C to +60°C; relative humidity: ≤90%; vibration: acceleration of 20 m/s²; shock: peak acceleration of 500 m/s².

VII.   Quick Start

X. Maintenance and Care

10.1 Instruments and equipment shall be managed by designated personnel, who shall use, maintain, and manage them in strict accordance with the instructions. Regular maintenance shall be performed to keep the equipment clean.

10.2 The instrument must be stored in a cool, dry, well-ventilated location free from corrosive gases and strong magnetic fields. During use and transportation, the instrument shall be kept clean, dry, shock-proof, and protected from direct sunlight.

10.3. In the event of a malfunction, the instrument shall be promptly inspected and repaired. Non-professional personnel are prohibited from opening the instrument cover for repair without authorization. During repair, the intrinsically safe design and specifications of intrinsically safe components must not be altered.

10.4 If the instrument is stored for an extended period, it must be charged regularly, with a full charge–discharge cycle performed every three months.

XI. Packing List

One instrument; one charger; one instruction manual; one certificate of conformity; one copy of the safety certification.

XII. Scope of Warranty

Our company offers a free replacement within two months and a one-year warranty for any product quality issues.

※The following situations are not covered under the warranty:

12.1. Improper user operation;

12.2. Human-induced damage, such as deformation or damage to the enclosure;

12.3. The sealing label affixed by our company has been torn off or damaged.

※ Instruments that are not covered under the warranty or for which the warranty has expired will be subject to a service fee charged by our company.