GB 15322-1994 Technical requirements and test methods for combustible gas detectors
Some standard content:
National Standard of the People's Republic of China
Combustible gas detectors
Technical requirements and test methods
Technical requirements and testmethods for combustible gas detectors Subject content and scope of application
GB15322-- -94
This standard specifies the technical requirements, test methods and markings of combustible gas detectors (hereinafter referred to as detectors). This standard applies to combustible gas (steam) detectors used in places with flammable gas hazards. For detectors with special requirements, this standard should also be implemented unless the special requirements are separately specified by the relevant standards. 2 Reference standards
GB4715 point type smoke fire detector technical requirements and test methods 3 Terminology
3.1 Alarm set value (alarm set value) The preset combustible gas alarm concentration.
3.2 Alarm operation value (alarm operation value) is the concentration of combustible gas when the detector alarms. 3.3 Response time (response time)
The time interval from when the detector is momentarily exposed to the test gas in clean air until an alarm is issued. 3. 4 Multipurpose detector (general purpose detector) is a detector that can respond to two or more combustible gases. 3.5 A single detector (selectable detector) is a detector that can only respond to one type of combustible gas. 4 Technical requirements
4.1 When the combustible gas concentration in the monitored area reaches the alarm set value, the detector should output an alarm signal. 4.2 Storage
After the detector undergoes the power-off storage test according to 5.2.1, the detector should be powered on to check that its function should be normal. 4.3 Orientation
For diffusion detectors, rotate 45° on their three mutually perpendicular axes of X, Y, and Z. The difference between the measured alarm action value and the alarm set value should not exceed ±5 %LEL.
Note: LEL-Low Explosion Limit. 4.4 Alarm action value
The alarm setting value of the detector should be adjustable. The lower limit alarm setting value should be set at 25% LEL or below. For those with two-stage alarms, the upper limit shall be National Technical Supervision Bureau 1994 -12-22 approved 1995-10-01 implementation
129
The alarm setting value should be set at 50%1.EL.
GB 15322--94
Under normal environmental conditions, the difference between the alarm action value and the alarm set value should not exceed ±3% LEL. 4.5 Alarm repeatability
The detector actually measured the alarm action value 6 times, and the difference between the alarm setting value each time should not exceed ±3% LEL. 4.6 Alarm response time
The low-limit alarm response time of the detector should not exceed 30s, and the high-limit alarm response time should not exceed 50$. 4.7 Full-scale indication deviation
For detectors with metering and detection functions, the difference between the measured value measured at each scale and the corresponding test gas concentration should not exceed ±5% LEL.
4.8 high-speed air flow
The difference between the alarm action value and the alarm setting value of the diffusion detector should not exceed ±5% LEL. 4.9 Power supply voltage fluctuation
When the rated operating voltage of the controller changes ±15% in the AC power supply voltage, the difference between the alarm action value of the detector in the test gas and the alarm setting value should not exceed ±3% LEL. 4.10 High concentration submersion
The difference between the detector alarm action value and the alarm setting value should not exceed ±3% LEL. 4.11 High Humidity Performance
The detector works normally at a temperature of 40±2C and a relative humidity of 92=%. The difference between the alarm action value and the alarm set value should not exceed ±5% LEL.
4.12 High Temperature Performance
The detector should be able to work normally in an environment with a temperature of 70±2C, and the difference between the alarm action value and the alarm set value should not exceed ±10% LEL.
4.13 Low Temperature Performance
The detector should be able to work normally in an environment with a temperature of -40±2°C. The difference between the alarm action value and the alarm set value should not exceed ±10% LEI.|| tt | Not less than 100MQ and 1M respectively. 4. 15 Withstand voltage test
The detector shall be tested according to the requirements of Article 5.2.14 of this standard. During the test, the detector should not experience surface arcing, sweeping discharge, corona or breakdown.
4.16 Vibration resistance performance
The detector shall be tested in accordance with the requirements of Article 5.2.15 of this standard. During the test, components should not fall off, be mechanically damaged, or become loose, and their functions should be normal.
After the test, the alarm action value test shall be carried out according to the requirements of 5.2.3. The difference between the measured alarm action value and the alarm set value shall not exceed ±5% LEL.
4.17 Long-term stability
The detector shall be powered on and run continuously for 28 days under normal environmental conditions. During this period, no alarm signals or fault signals shall occur. When conducting the verification test according to the requirements of 5.2.3, the difference between the alarm action value and the alarm set value should not exceed ±5% LEL. 5 Test
5.1 General requirements for testing
5.1.1 The test specified in this standard is a type test. The detector test shall be carried out according to the test procedures specified in Appendix A and the equipment specified in Appendix B 13||tt| | OK. | |tt | 5.1.3 If there is no explanation in the relevant clauses, the test tolerance is ±5%. 5.1.4 For detectors that cannot perform dynamic alarm response tests, static alarm or non-alarm response tests can be performed according to tolerance regulations. 5.1.5 There are 8 splash detectors for the sample under test (hereinafter referred to as the sample), which should be numbered from 1 to 8.
5.1.6 Test gas
5.1.6.1 For a single detector specifically designed to respond to methane or a multi-purpose detector that responds to methane, use a methane-air mixed gas.
5.1.6.2 For detectors that respond to flammable gases other than methane, use a propane-air mixture. 5.1.6.3 For detectors with special requirements, the testing unit should provide test gases (standard gas and upper and lower tolerance limit test gases, and hold standard gas calibration data from the measurement department) in accordance with relevant standards. 5.1.7 Test gas distribution accuracy
The purity of the combustible gas used to prepare the test gas should not be less than 99.5%. The air used to prepare the test gas should be fresh air that does not contain dust or oil. The gas distribution humidity should comply with Under normal humidity conditions, the gas distribution error should not be greater than ±2% of the alarm setting value. 5.1.8 Normal environmental conditions
Temperature: 15～35℃#
Relative humidity; 45%~75%
Air
Pressure: 86106kPa. www.bzxz.net
5.1.9 The protective components installed on the product should be tested together with the sample (except for the alarm response time test). 5.1.10 Diffusion detectors should undergo azimuth testing: inhalation detectors do not undergo this test. 5.1.11 Sample calibration
Before the test, the alarm point of the sample should be calibrated according to the alarm setting value according to the product manual, and retested for confirmation. Once the test is conducted, no further calibration is performed. Calibration of specimens allows the use of calibration masks. 5.1.12 Sample zero adjustment
Before conducting the test, first preheat the sample for 1 hour (or preheat according to the product instruction manual, and then perform zero adjustment according to the instructions). There will be no zero adjustment after the test starts. , tuning is only allowed when there are special requirements in individual test procedures. 5.1.13 Before performing functional testing, the detector should be tested to meet the requirements of the explosion-proof level.
5.2.1 Storage test| |tt||5.2.1.1 First, all samples should be checked and zeroed under normal conditions. The normal samples should be sent into the cryogenic chamber, and the temperature should be lowered to -35°C at a cooling rate of no more than 1°C/min. 2℃, and carry out 24h power-off storage. 5.2.1.2 Then take it out and place it in the room under normal environmental conditions for 24h power-off storage. 5.2.1.3 Then, put the sample into the high temperature test chamber at a temperature of no more than 1℃/ min heating rate, raise the temperature to 55°C ± 2% for 24 hours of power-off storage
5.2.1.4 Then take it out and place it in normal environmental conditions indoors for 24 hours of power-off storage. 5.2.1.5 The storage test is completed. Then, perform power-on inspection under normal environmental conditions 5.2.2 Orientation test
5.2.2.1 Install it in the test box according to normal working conditions, connect it to the controller placed under normal environmental conditions, and stabilize for 1h after powering on.
5.2.2.2 Start the ventilator to make the air flow speed reach 0.8±0.2m/s, then increase the test gas concentration at an air intake rate of no more than 0.05%/min, and measure the position of the sample on the Z axis 0 ° alarm action value. Afterwards, the test will be carried out every 45 directions of rotation, and the alarm action value of each direction on the Z axis will be measured.
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GB15322-94
5.2.2.3 Then, discharge the test exhaust gas, replace it with fresh air, rotate the sample orientation 45° on the Y-axis, and measure the Y-axis Alarm action values ??in each direction above.
5.2.2.4 Then, test the alarm action values ??in each direction on the X-axis. If the external structure and internal component structure of the sample on the X-axis have no impact on the air flow, the X-axis test does not need to be performed. 5.2.3 Alarm action value test
5.2.3.1 Install the sample in the test box according to normal working conditions, and after connecting the power supply to the controller, stabilize it for 1 hour under normal environmental conditions. 5.2.3.2 Start the ventilator to make the air flow reach 0.8±0.2m/s, and then increase the test gas concentration at a rate of no more than 0.05%/min until an alarm signal is issued and the response concentration is measured. 5.2.4 Alarm repeatability test
Repeat the test 6 times according to the test method in 5.2.3 of this standard, and test the alarm action value of each test separately. 5.2.5 Alarm response time test
5.2.5.1 Install the sample on the response time device in normal working condition. After connecting the power supply to the controller, it shall be stable for 1 hour under normal environmental conditions.
5.2.5.2 Then lightly wash the sample with clean air for 1 minute, then move the steady flow tube filled with 60% LEL test gas (at a flow rate of 10L/min) to the sample, and start automatically at the same time The timer stops recording when the sample issues an alarm and measures the response time when the alarm occurs. 5.2.6 Full-scale indication deviation test
5.2.6.1 Install the sample in the calibration test device according to normal working conditions. After connecting to the power supply with the controller, stabilize it for 1 hour under normal environmental conditions.
5.2.6.2 First, after extracting the air from the calibration tank, Yiruan will add 10%, 25%, 50%, 75%, and 90% of the full-scale gas concentration of the test gas at a temperature of not less than 500mL/min. The flow rate is sent into the calibration tank for calibration test, and monitored with an infrared gas analyzer, and the indicated value in each case is measured in turn. 5.2.6.3 If a calibration cover is used for calibration, attention should be paid to promptly discharging the combustible gas outdoors after the test. 5.2.7 High-speed air flow test
5.2.7.1 Install the sample in the test box in normal working condition, and connect the power to the controller placed under normal environmental conditions and stabilize for 1h
5.2. 7.2 Then start the ventilator to make the gas flow rate reach 5±0.5m/s, and increase the test gas concentration with an air intake volume of 600~1200mL/min until an alarm is issued and the alarm action value is measured. 5.2.8 Voltage fluctuation test
5.2.8.1 Install the sample in the test box in normal working condition. After connecting the power supply to the controller, stabilize it for 1 hour under normal environmental conditions. 5.2.8.2 First adjust the power supply voltage of the controller to 115% of the rated operating voltage. After stabilization, start the ventilator to make the gas flow rate reach 0.8±0.2m/s, and then increase the test gas concentration at a rate of no more than 0.05%/min. , until an alarm is issued and the alarm action value is measured. 5.2.8.3 Then, exhaust the gas in the test chamber and replace it with fresh air. Next, adjust the controller supply voltage to 85% of the rated operating voltage.
5.2.8.4 Increase the test gas concentration at a rate of no more than 0.05%/min until an alarm signal is issued and the alarm action value is measured. 5.2.9 High concentration submersion test
5.2.9.1 Install the detector in the calibration test device in normal working condition. After connecting the power to the controller, it should be stable for 1 hour under normal environmental conditions.
5.2.9.2 Next, send 200% LEL test gas into the calibration device for 1 minute, and then clean it with clean air for 1 minute. 5.2.9.3 Then take out the sample, place it in the test box, and measure the alarm action value according to the requirements of 5.2.3. 5.2.10 High Humidity Test
5.2.10.1 Install the sample in the test box according to normal working conditions, and connect the power to the controller placed under normal indoor environmental conditions, and then stabilize it for 1 hour under normal environmental conditions. . 5.2.10.2 After the stabilization time is over, make the gas flow rate reach 0.8±0.2m/s, adjust the test chamber, and increase the temperature at a heating rate of no more than 1℃/min 132
GB15322-94
Raise to 40±2℃, then increase the relative humidity to 92±% at a rate of no more than 5%RH/min, and stabilize for 1 hour. 5.2.10.3 Then, increase the test gas concentration at a rate of no more than 0.05%/min until an alarm signal is issued and the alarm action value is measured.
5.2.11 High Temperature Test
5.2.11.1 Install the sample in the test box in normal working condition, and connect the power to the controller placed under normal environmental conditions. Preheating is stable for 1 hour after power on. 5.2.11.2 Start the ventilator to make the air flow reach 0.8±0.2m/s, increase the overflow in the box to a temperature of 70±2°C and stabilize it for 1 hour at a heating rate of no more than 1°C/min.
5.2.11.3 Then, increase the test gas concentration at a rate of no more than 0.05%/min until an alarm signal is issued and the alarm action value is measured.
5.2.12 Low temperature test
5.2.12.1 Install the sample in the test box in normal working condition, and connect the power to the controller placed under normal indoor environmental conditions. Stable for 1h under conditions. 5.2.12.2 After the stabilization time is over, start the ventilator to make the wind speed reach 0.8±0.2m/s, and then lower the temperature in the test chamber to -40±2°C at a cooling rate of no more than 1°C/min and stabilize it for 1 hour. 5.2.12.3 Then, increase the test gas concentration at a rate of no more than 0.05%/min until an alarm signal is issued and the alarm action value is measured.
5.2.13 Insulation resistance test
Conducted in accordance with the relevant provisions of GB4715.
5.2.14 Withstand voltage test
Conducted in accordance with the relevant provisions of GB4715.
5.2.15 Vibration resistance test
5.2.15.1 Install the sample on the vibration test bench in normal working condition, and connect the power supply to the controller to stabilize for 1 hour. 5.2.15.2 On three mutually perpendicular axes, in the frequency cycle range of 10~~150~~10Hz, perform a frequency sweep cycle with an acceleration amplitude of 9.81m/s2 and a frequency sweep rate of 1 oct/min. , check whether there are dangerous frequencies. 5.2.15.3 If there are dangerous frequencies, conduct a fixed-frequency vibration test with an acceleration amplitude of 9.81m/s and a duration of 90±1min on each dangerous frequency of three mutually perpendicular axes. If there is no dangerous frequency, conduct a fixed-frequency vibration test with a frequency of 150Hz, an acceleration amplitude of 9.81m/s2, and a duration of 90±1min on three mutually perpendicular axes. 5.2.15.4 After the test, conduct internal and external inspections, and conduct alarm action value tests in accordance with Article 5.2.3 of this standard. 5.2.16 Long-term stability test
5.2.16.1 After connecting the sample to the controller, turn on the power supply and preheat and stabilize for 1 hour under normal environmental conditions. 5.2.16.2 Then place the sample in 50% LEL test gas for 3 minutes, and then place the sample under normal environmental conditions with continuous power supply for 7 days.
After 5.2.16.3, the above test shall be carried out every 7 days for a total of four cycles. Zero adjustment is allowed after each cycle. 5.2.16.4 After the 28th day of operation, immediately conduct the alarm action value test. 6 mark
Each detector should have a clear and durable product nameplate. The nameplate should include the following main contents: explosion-proof mark and explosion-proof certificate number that comply with relevant national standards; a.
h ． Quality inspection mark and quality inspection certificate number that comply with relevant national standards; product model and name;
c.
Main technical parameters of the product (including explosion-proof type, category, level, temperature group ), d.
Product manufacturer name, product manufacturing date and product number. e.
Serial number
1
2
3
4
5
6
7|| tt||8
9
10
11
12
13
14
15||tt| |16
Articles
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5| |tt||5.2.6
5.2.7
5.2.8
5.2.9
5.2.10
5.2.11||tt ||5.2.12
5.2.13
5.2.14
5.2.15
5.2.16
GB15322-94
Appendix A
Combustible gas detector test program table
(supplement)
Test items
Storage test
Axis test
Alarm Action value test
Alarm repeatability test
Alarm response time test
Full range indication deviation test
High-speed air flow test
Voltage fluctuation test||tt ||High concentration flooding test
High humidity test
High temperature test
Low temperature test
Insulation resistance test
Withstand voltage test
Vibration resistance Test
Long-term stability test
Note: The two tests No. 1 and 2 must be conducted in order first. Appendix B
V
Combustible gas detector test equipment
(supplement)
B1 combustible gas detector temperature and humidity test chamber
B1.1 Schematic diagram of the air flow tube of the temperature and humidity test chamber (see Figure B1) 131
2
V
Detector number
4
5
5
6
9
GB 15322-—94
13
Figure B1
H
1-Wind Simple; 2-Flower: 3--Ventilation fan: 4-Deflector, 5--Rectifier grid; 6-Humidification door; 7-Air inlet door; 8-Exhaust door: 9-Heater, 10--- Detector 11 - Combustible gas entry port: 12 - DC motor, 13 - Infrared gas analyzer; 14 - Temperature detector: 15 - Humidity detector; 16 - Anemometer B1.2 technical parameters
a.
Closed-loop air flow tube simplified
The internal volume is 1.1m2, the cross-sectional area is 0.4×0.4m, the stainless steel plate is 1.5mm, and the length is 2.4m. b. Ventilator
3kW, 2900r/min, left-hand 90° stainless steel plate 1.5mm, DC motor 3kW, speed adjustment range 0.7-6m/s. Heater
c.
3-phase 3 groups, 380V, 5.4kW, 6 heating tubes per group, 300W each heating tube, surface temperature less than 30℃, constant temperature 70℃, heating rate less than 1℃/min.
d． Humidifier
Electric humidifier, water vapor humidification speed is less than 5%kRH/min. e.
Measurement room environmental conditions
Temperature: 15～70℃, ±2℃;
Humidity: 10%～95%RH, ±5% RH;||tt| |Flow velocity: 0.7~5m/s, ±5%.
f． Gas concentration measuring instrument
QGS-08 infrared gas analyzer
Methane measuring range: 0~5~~15%;
Propane measuring range: 0~~5%.
g.
Temperature measuring instrument
h. Humidity measuring instrument
SYR-1 digital humidity meter, the instrument accuracy is ±3%RH and the resolution is ±1%RH. i. Wind speed measuring instrument
QDF-2 type thermal bulb anemometer
The measurement range is 0.2~10m/s, and the measurement error is not more than ±5%. B2 combustible gas detector low temperature test chamber
GB 15322-94
B2.1 Simple air flow diagram of low temperature test chamber (see Figure B2) 2
Figure B2
1 —Air duct; 2 Vortexer 3 — Ventilator, 4 — DC motor; 5 — Deflector; 6 — Rectifier grid; 7 — Air inlet door; 8 — Exhaust valve; 9 — Evaporator, 10 — Heater , 11—Detector, 12—Combustible gas inlet 13—Infrared gas analyzer, 14—Temperature detector, 15—Anemometer B2.2 technical parameters
Closed-loop wind simple
a.
Same as Bl.2.a.
b． Ventilator
Same as B1.2.b.
c. Evaporator
Refrigeration capacity 4000~4800kcal/h, refrigerant R502, 2 refrigeration compressor units, cooling temperature - 40℃, cooling speed less than 1'C/min
d. Heater
3 phase 1 group, 380V, 9kW.
e.
Measuring room environmental conditions
Temperature: -40℃±2C;
Flow velocity: 0.7~~1m/s, ±5%.
f． Gas concentration measuring instrument
Same as B1.2.f.
g, temperature measuring instrument
Same as B1.2.g.
h． Wind speed measuring instrument
Same as Bl.2.i.
B3 combustible gas detector calibration test capacity B3.1 Calibration test device schematic diagram (see Figure B3) 13ri
B3.2 Technical parameters
Test tank
a .
GB15322—94
Picture B3
1--Test lulu+2--Safety valve, 3-Compression claw, 4-Detector, 5-Air inlet *6—Exhaust port; 7—Transparent cover, 8—Gas measurement nozzle? 9—Workbench + 10—Lift inner diameter 180mm, depth 150mm, divided into four layers, each 40.50 to 0.20mm, except for 50mm which is transparent plexiglass , the rest are made of stainless steel, with a wall thickness of 10 mm.
b． Safety valve
Release pressure 50kPa.
c. Inlet and outlet nozzles
Inner diameter 5mm, stainless steel or brass material.
d． Lift
Manual lift distance 100mm, cast steel chrome plated material. B4 combustible gas detector response time test device B4.1 schematic diagram of response time test device (see Figure B4) 137
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GB15322-94
Appendix A
Test procedure table for combustible gas detectors
(Supplement)
Test items
Storage test
Azimuth test
Alarm action value test
Alarm repeatability test
Alarm response time test
Full-scale indication deviation test
High-speed airflow test
Voltage fluctuation test
High concentration flooding test
High humidity test
High temperature test
Low temperature test
Insulation resistance test
Withstand voltage test
Vibration resistance test
Long-term stability test
Note: Tests No. 1 and 2 must be carried out first in sequence. Appendix B
V
Combustible gas detector test equipment
(Supplement)
B1 Temperature and humidity test chamber for combustible gas detector
B1.1 Schematic diagram of wind flow tube of temperature and humidity test chamber (see Figure B1) 131
2
V
Detector number
4
5
5
6
9
GB 15322--94
13
Figure B1
H
1-wind tube; 2-flow device: 3--ventilator: 4-flow guide plate, 5--rectifier grid; 6-humidification door; 7-air inlet door; 8-exhaust door: 9-heater, 10---detector 11-combustible gas inlet: 12-DC motor, 13-infrared gas analyzer; 14--temperature detector: 15-humidity detector; 16-anemometer B1.2 Technical parameters
a.
Closed-loop wind flow tube
Internal volume 1.1m2, cross-sectional area 0.4×0.4m, stainless steel plate 1.5mm, length 2.4m. b. Fan
3kW, 2900r/min, left-hand 90° stainless steel plate 1.5mm, DC motor 3kW, speed range 0.7-6m/s. Heater
c.
3-phase 3 groups, 380V, 5.4kW, 6 heating tubes in each group, 300W per heating tube, surface temperature less than 30℃, constant temperature 70℃, heating rate less than 1℃/min.
d. Humidifier
Electrical humidifier, water vapor humidification rate less than 5%kRH/min. e.
Environmental conditions of the measuring room
Temperature: 15～70℃, ±2℃;
Humidity: 10%～95%RH, ±5% RH;
Flow rate: 0.7~5m/s, ±5%.
f. Gas concentration measuring instrument
QGS-08 infrared gas analyzer
Methane measurement range: 0~5~~15%;
Propane measurement range: 0~~5%.
g.
Temperature measuring instrument
XMZ-101 digital temperature display instrument, instrument accuracy 0.5 level, resolution ±0.1℃. h. Humidity measuring instrument
SYR-1 digital humidity meter, instrument accuracy ±3%RH, resolution ±1%RH. i. Wind speed measuring instrument
QDF-2 hot ball anemometer
Measuring range 0.2~10m/s, measurement error is not more than ±5%. B2 Low temperature test chamber for combustible gas detectors
GB 15322—94
B2.1 Schematic diagram of wind flow in low temperature test chamber (see Figure B2)2
Figure B2
1—wind tube; 2 vortexer 3—ventilator, 4—DC motor; 5—guide plate; 6—rectifier grid; 7—air inlet door; 8—exhaust door; 9—evaporator, 10—heater, 11—detector, 12—combustible gas inlet port 13—infrared gas analyzer, 14—temperature detector, 15—anemometerB2.2 Technical parameters
Closed loop wind flow
a.
Same as Bl.2.a.
b． Ventilator
Same as B1.2.b.
c． Evaporator
Refrigeration capacity 4000～4800kcal/h, refrigerant R502, 2 refrigeration compressor units, refrigeration temperature -40℃, cooling rate less than 1'C/min
d. Heater
3-phase 1 group, 380V, 9kW.
e.
Environmental conditions of measurement room
Temperature: -40℃±2C;
Flow rate: 0.7~～1m/s, ±5%.
f. Gas concentration measuring instrument
Same as B1.2.f.
g, temperature measuring instrument
Same as B1.2.g.
h. Wind speed measuring instrument
Same as Bl.2.i.
B3 Calibration test of combustible gas detectors B3.1 Schematic diagram of calibration test device (see Figure B3) 13ri
B3.2 Technical parameters
Test tank
a.
GB15322-94
Figure B3
1--Testing rod+2--Safety valve, 3-Pressing claw, 4-Detector, 5-Air inlet*6-Exhaust port; 7-Transparent cover, 8-Measurement gas nozzle?9-Workbench+10-Lifting machine with an inner diameter of 180mm and a depth of 150mm, divided into four layers, each of which is 40.5040.20mm. Except for 50mm of transparent organic glass, the rest are stainless steel with a wall thickness of 10 mm.
b. Safety valve
Release pressure 50kPa.
c. Inlet and outlet nozzles
Inner diameter 5mm, stainless steel or brass material.
d. Lifter
Manual lifter distance 100mm, cast steel chrome-plated material. B4 Combustible gas detector response time test device B4.1 Schematic diagram of response time test device (see Figure B4) 137
16
GB15322-94
Appendix A
Combustible gas detector test program table
(Supplement)
Test items
Storage Test
Axis test
Alarm action value test
Alarm repeatability test
Alarm response time test
Full range indication deviation test
High speed air flow test
Voltage fluctuation test
High concentration flooding test
High humidity test
High temperature test
Low temperature test
Insulation resistance test
Voltage resistance test
Vibration resistance test
Long-term stability test
Note: The two tests No. 1 and 2 must be carried out in order first. Appendix B
V
Combustible gas detector test equipment
(supplement)
B1 combustible gas detector temperature and humidity test chamber
B1.1 Schematic diagram of the air flow tube of the temperature and humidity test chamber (see Figure B1) 131
2
V
Detector number
4
5
5
6
9
GB 15322-—94
13
Figure B1
H
1-Wind Simple; 2-Flower: 3--Ventilation fan: 4-Deflector, 5--Rectifier grid; 6-Humidification door; 7-Air inlet door; 8-Exhaust door: 9-Heater, 10--- Detector 11 - Combustible gas entry port: 12 - DC motor, 13 - Infrared gas analyzer; 14 - Temperature detector: 15 - Humidity detector; 16 - Anemometer B1.2 technical parameters
a.
Closed-loop air flow tube simplified
The internal volume is 1.1m2, the cross-sectional area is 0.4×0.4m, the stainless steel plate is 1.5mm, and the length is 2.4m. b. Ventilator
3kW, 2900r/min, left-hand 90° stainless steel plate 1.5mm, DC motor 3kW, speed adjustment range 0.7-6m/s. Heater
c.
3-phase 3 groups, 380V, 5.4kW, 6 heating tubes per group, 300W each heating tube, surface temperature less than 30℃, constant temperature 70℃, heating rate less than 1℃/min.
d． Humidifier
Electric humidifier, water vapor humidification speed is less than 5%kRH/min. e.
Measurement room environmental conditions
Temperature: 15～70℃, ±2℃;
Humidity: 10%～95%RH, ±5% RH;||tt| |Flow velocity: 0.7~5m/s, ±5%.
f． Gas concentration measuring instrument
QGS-08 infrared gas analyzer
Methane measuring range: 0~5~~15%;
Propane measuring range: 0~~5%.
g.
Temperature measuring instrument
h. Humidity measuring instrument
SYR-1 digital humidity meter, the instrument accuracy is ±3%RH and the resolution is ±1%RH. i. Wind speed measuring instrument
QDF-2 type thermal bulb anemometer
The measurement range is 0.2~10m/s, and the measurement error is not more than ±5%. B2 combustible gas detector low temperature test chamber
GB 15322-94
B2.1 Simple air flow diagram of the low temperature test chamber (see Figure B2) 2
Figure B2
1 —Air duct; 2 Vortexer 3 — Ventilator, 4 — DC motor; 5 — Deflector; 6 — Rectifier grid; 7 — Air inlet door; 8 — Exhaust valve; 9 — Evaporator, 10 — Heater , 11—Detector, 12—Combustible gas inlet 13—Infrared gas analyzer, 14—Temperature detector, 15—Anemometer B2.2 technical parameters
Closed-loop wind simple
a.
Same as Bl.2.a.
b． Ventilator
Same as B1.2.b.
c. Evaporator
Refrigeration capacity 4000~4800kcal/h, refrigerant R502, 2 refrigeration compressor units, cooling temperature - 40℃, cooling speed less than 1'C/min
d. Heater
3 phase 1 group, 380V, 9kW.
e.
Measuring room environmental conditions
Temperature: -40℃±2C;
Flow velocity: 0.7~~1m/s, ±5%.
f． Gas concentration measuring instrument
Same as B1.2.f.
g, temperature measuring instrument
Same as B1.2.g.
h． Wind speed measuring instrument
Same as Bl.2.i.
B3 combustible gas detector calibration test capacity B3.1 Calibration test device schematic diagram (see Figure B3) 13ri
B3.2 Technical parameters
Test tank
a .
GB15322—94
Picture B3
1--Test lulu+2--Safety valve, 3-Compression claw, 4-Detector, 5-Air inlet *6—Exhaust port; 7—Transparent cover, 8—Gas measurement nozzle? 9—Workbench + 10—Lift inner diameter 180mm, depth 150mm, divided into four layers, each 40.50 to 0.20mm, except for 50mm which is transparent plexiglass , the rest are made of stainless steel, with a wall thickness of 10 mm.
b． Safety valve
Release pressure 50kPa.
c. Inlet and outlet nozzles
Inner diameter 5mm, stainless steel or brass material.
d． Lift
Manual lift distance 100mm, cast steel chrome plated material. B4 combustible gas detector response time test device B4.1 schematic diagram of response time test device (see Figure B4) 137
1 Schematic diagram of low temperature test chamber air flow (see Figure B2) 2
Figure B2
1—wind tube; 2 vortexer 3—ventilator, 4—DC motor; 5—flow guide plate; 6—rectifier grid; 7—air inlet door; 8—exhaust door; 9—evaporator, 10—heater, 11—detector, 12—combustible gas inlet port 13—infrared gas analyzer, 14—temperature detector, 15—anemometer B2.2 Technical parameters
Closed loop air flow
a.
Same as Bl.2.a.
b． Ventilator
Same as B1.2.b.
c． Evaporator
Refrigeration capacity 4000～4800kcal/h, refrigerant R502, 2 refrigeration compressor units, refrigeration temperature -40℃, cooling rate less than 1'C/min
d. Heater
3-phase 1 group, 380V, 9kW.
e.
Environmental conditions of measurement room
Temperature: -40℃±2C;
Flow rate: 0.7~～1m/s, ±5%.
f. Gas concentration measuring instrument
Same as B1.2.f.
g, temperature measuring instrument
Same as B1.2.g.
h. Wind speed measuring instrument
Same as Bl.2.i.
B3 Calibration test of combustible gas detectors B3.1 Schematic diagram of calibration test device (see Figure B3) 13ri
B3.2 Technical parameters
Test tank
a.
GB15322-94
Figure B3
1--Testing rod+2--Safety valve, 3-Pressing claw, 4-Detector, 5-Air inlet*6-Exhaust port; 7-Transparent cover, 8-Measurement gas nozzle?9-Workbench+10-Lifting machine with an inner diameter of 180mm and a depth of 150mm, divided into four layers, each of which is 40.5040.20mm. Except for 50mm of transparent organic glass, the rest are stainless steel with a wall thickness of 10 mm.
b. Safety valve
Release pressure 50kPa.
c. Inlet and outlet nozzles
Inner diameter 5mm, stainless steel or brass material.
d. Lifter
Manual lifter distance 100mm, cast steel chrome-plated material. B4 Combustible gas detector response time test device B4.1 Schematic diagram of response time test device (see Figure B4) 137
1 Simple schematic diagram of the air flow of the low temperature test chamber (see Figure B2) 2
Figure B2
1—air duct; 2 vortexer 3—ventilator, 4—DC motor; 5—baffle; 6—rectifying grid; 7—air inlet door; 8—exhaust valve; 9—evaporator, 10—heater, 11—detector, 12—combustible gas inlet 13—infrared gas analyzer, 14—temperature detection Meter, 15—Technical parameters of anemometer B2.2
Closed-loop wind simple
a.
Same as Bl.2.a.
b． Ventilator
Same as B1.2.b.
c． Evaporator
Refrigeration capacity 4000~4800kcal/h, refrigerant R502, 2 refrigeration compressor units, cooling temperature - 40℃, cooling speed less than 1'C/min
d. Heater
3 phase 1 group, 380V, 9kW.
e.
Measuring room environmental conditions
Temperature: -40℃±2C;
Flow velocity: 0.7~~1m/s, ±5%.
f． Gas concentration measuring instrument
Same as B1.2.f.
g, temperature measuring instrument
Same as B1.2.g.
h． Wind speed measuring instrument
Same as Bl.2.i.
B3 combustible gas detector calibration test capacity B3.1 Calibration test device schematic diagram (see Figure B3) 13ri
B3.2 Technical parameters
Test tank
a .
GB15322—94
Picture B3
1--Test lulu+2--Safety valve, 3-Compression claw, 4-Detector, 5-Air inlet *6—Exhaust port; 7—Transparent cover, 8—Gas measurement nozzle? 9—Workbench + 10—Lift inner diameter 180mm, depth 150mm, divided into four layers, each 40.50 to 0.20mm, except for 50mm which is transparent plexiglass , the rest are made of stainless steel, wall thickness 10 mm.
b． Safety valve
Release pressure 50kPa.
c． Inlet and outlet nozzles
inner diameter 5mm, stainless steel or brass material.
d． Lift
Manual lift distance 100mm, cast steel chrome plated material. B4 combustible gas detector response time test device B4.1 schematic diagram of response time test device (see Figure B4) 137
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