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Instruction Manual for the YHJ-50(A) Intrinsically Safe Laser Aiming Device for Mining

Release Date:

2021-06-10

YHJ-50 （ A )

Intrinsically Safe Laser Sight for Mining

Instruction Manual

Implementation Standard: GB /T 3836-20 21

Q/HGY 21-20 22

Publication Date: 2022 year 6 month

Safety Certification Number : MAK090017

Explosion-proof certificate number : CMExC23.4518

Harbin Optical Instruments Factory Co., Ltd.

I. Overview

YHJ-50 (A) The intrinsically safe laser sight for mining is an instrument that integrates electronics, optics, precision mechanics, and other technologies. All of the instrument’s specifications and performance meet GB /T 3836.1 -20 21 Explosive environment The nth 1 Section: General Requirements for Equipment; GB /T 3836.4-20 21 Explosive environment The nth 4 Section: Intrinsically Safe “i” Protected equipment; MT 870-2000 Explosion-proof laser pointer for coal mines; Q/HGY21-2022 Requirements for intrinsically safe laser sights for mining use.

II. Instrument Applications

YHJ-50 (A) Intrinsically safe laser sights for mining applications can be used for aiming and pointing with instruments. They are primarily employed in coal mine extraction areas where flammable gases are present, working in conjunction with various instruments to achieve aiming, pointing, target acquisition, and area scanning.

III. Definition of Laser Sight Models

IV. Basic Parameters and Performance Requirements

Installation method: Portable

Explosion-proof type Type: Intrinsically Safe for Mining

Explosion-proof marking: Ex ib I Mb

Laser pointer operating mode: intermittent operation

Size: F 23mm times 89mm

Weight: 0.1kg

Power supply: lithium thionyl chloride battery ER17335 ，3.6V，2.1Ah，1 Only.

Intrinsic safety parameters:

ER17335 Lithium thionyl chloride original battery Section 1, Capacity 2.1Ah

U _o： Direct Current 3.9 V ， I _o：1.6 A

Rated Operating voltage: 3.6 V , operating current less than or equal to 6 0 mA

Performance Requirements:

Effective range 50m , in 50m The spot diameter at the location shall not exceed 15mm , in 50m The spot drift shall not exceed 5mm。

Optical power: not greater than 150 milliwatt

V. Operating Principle of the Instrument

The operating principle is illustrated in the figure: the laser module is powered by a battery to emit laser light, and a switch controls the on/off state of the power supply to the laser module.

VI. Operating Environment

This instrument is manufactured in strict accordance with the intrinsically safe structural and performance requirements for mining applications and complies with the relevant regulations. The instrument may be used in the following environments:

Ambient temperature: 0 degrees Celsius ~+40 degrees Celsius
Relative humidity: ≤95%RH(+2 5 degrees Celsius time )
Ambient atmospheric pressure: 86 kPa~110 kPa
In an atmosphere containing explosive gases ( Methane ) In the underground coal mine environment mixed with coal dust
In an environment free of gases or vapors that would visibly degrade the insulation
Pollution Level: 3 Level

VII. Instrument Structure and Operating Procedures

1 ．Instrument Structure and Features

YHJ-50 (A) The intrinsically safe laser sight for mining applications consists of a laser module, a battery, and an optical system. This instrument is compact and lightweight, easy to install and adjust, and its structural configuration is shown in the figure.

1 ．Switch button 2. Laser head 3. Laser beam

2 ．Installation and Use of the Instrument

Press the switch button 1 , connect the power supply, and a red laser beam will be emitted from the lens; then press the switch button again. 1 , disconnect the power supply, and the laser will turn off.

VIII. Simple Troubleshooting

“ The instrument is not working. ” Please inspect your instrument according to the table below. If the instrument still does not function properly after inspection, please contact a service center or the manufacturer.

Ask Question

Can can of original Because

Press the switch button , the instrument does not emit light

Check and verify that the battery voltage is normal.

Verify that the battery polarity is installed correctly.

The instrument is emitting light, but the light spot is very weak.

Check and verify that the battery voltage is normal.

IX. Maintenance, Servicing, and Safety Warnings

The sight should be handled with care and protected from severe vibration to maintain its accuracy.
When operating the sight, use only the input voltage specified on the nameplate; the use of batteries other than those specified in the instruction manual is strictly prohibited.
When adjusting the laser beam, do not apply excessive force; it is strictly prohibited. Do not look directly at the laser beam to avoid eye injury;
It is strictly prohibited to replace batteries in environments containing flammable gases; such operations must be performed in a safe location. ；
During operation and maintenance, the electrical parameters, specifications, and model numbers of intrinsically safe circuits and components associated with such circuits shall not be altered.
When the device will not be used for an extended period, remove the batteries.
This instrument 12 Within one month, free warranty service will be provided for quality issues arising from our factory, along with lifetime repair, calibration, and after-sales service.