1 Scope
This standard specifies technical specifications, test methods, inspection rules, marking, package, instruction, transportation and storage of coal mine electrochemical carbon monoxide transducer.
This standard is applicable to electrochemical carbon monoxide transducers used for monitoring in coalmine shafts (hereinafter referred to as transducers)
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, all subsequent modification or revision (excluding correction contents) is not applicable to this standard. However, all concerned parties are encouraged to study if the latest editions of these documents can be applied. For undated references, the latest edition of the normative document is applicable to these specifications.
GB 191 Packaging-Pictorial markings for handling of goods
GB/T 2423.1-2001 Environmental testing for electric and electronic and electronic products-Part 2: Test methods-tests A: Cold
GB/T 2423.2-2001 Environmental testing for electric and electronic and electronic products-Part 2: Test methods-tests B: Cold
GB/T 2423.4-93 Basic environmental testing procedures for electric and electronic products-Test Db: Damp heat, cyclic
GB/T 2423.5-1995 Environmental testing for electric and electronic products Part 2: Test methods Test Ea and guidance: Shock
GB/T 2423.8-1995 Environmental testing for electric and electronic products Part 2: Test methods Test Ed: Free fall
GB/T 2423.10-1995 Environmental testing for electric and electronic products-Part 2: Test methods Test Fc and guidance: Vibration (Sinusoidal)
GB 3836.1-2000 "Electrical Apparatus for Explosive Gas Atmospheres-Part 1: General Requirements"
GB 3836.4-2000 "Electrical Apparatus for Explosive Gas Atmospheres-Part 4: Intrinsic Safety"
GB 4208-93"Degrees of Protection Provided by Enclosure" (IP Code)
GB 9969.1-1998 General principles for preparation of instructions for use of industrial products
GB 10111-1988 Methods for random sampling by utilizing dices of random number
MT 210-1990 Fundamental test methods of coalmine communication, inspection and electric and electronic products used for control
MT/T 772-1998 Measuring methods for the primary performances of coal mine supervision systems
3 Terms and Definitions
3.1
Displayed value
Measured value displayed on the transducer.
3.2
Zero point
Displayed value of the transducer for normal work in the clean air
3.3
Calibration point
The selected calibration gas sample value of the sensor meeting the requirements of measuring accuracy
3.4
Alarm point
The pre-set alarm start value of sensor according to the operation requirement
3.5
Basic error
The measuring error value of the sensor determined in the normal test condition
3.6
Stability
In the specified operating condition and time, the zero point, calibration point and alarm point of the sensor are kept within the range of allowable variation.
3.7
T90 response time
If the concentration of the carbon monoxide had step change, 90% of the time for sensor output to reach the stable value.
4 Technical Requirements
4.1 General requirements
4.1.1 Sensors shall requirements in this standard, drawings and technological document manufacturing shall be examined and approved in accordance with the established procedure and authorized inspection organizations.
4.1.2 Sensors and associative devices shall be matched, and shall pass the joint inspection of anti-explosion inspection organizations authorized by relevant national departments. Associative devices matched with the sensor shall have effective safety sign certificate of products used for mine.
4.1.3 Explosion proof type of sensors shall use the mine intrinsic safety type and the anti-explosion mark is "ExibI".
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements
5 Test Methods
6 Inspection Rules
7 Marking, Package, Transportation, Operation Instruction and Storage
