GB 16808-1997 Technical requirements and test methods for combustible gas alarm controllers
Some standard content:
GB16808-1997
With the development of modern science and technology and the improvement of people's living standards, flammable gas is increasingly recognized and used by people. While flammable gas provides energy and convenience for production and life, it also deeply buries fire hazards. In recent years, many manufacturers have gradually developed and produced flammable gas detectors and alarm controllers. As the core of the flammable gas alarm system, the flammable gas alarm controller plays an important role in protecting people's lives and property from loss. At present, there is no international standard for flammable gas alarm controllers in the world, and there is no national standard in my country. In order to make this kind of product have a unified standard to follow in production, inspection and quality supervision, while studying and analyzing the relevant technical data of similar foreign products, a large amount of test verification work has been carried out on the flammable gas alarm controllers produced at home and abroad, and this standard has been formulated on this basis.
Compared with GB4717--93 "General Technical Conditions for Fire Alarm Controllers", this standard belongs to the same alarm controller product standard. Except for the differences in basic functions and some technical requirements, the setting of test items and the provisions of test methods are all compiled with reference to ISO/TC21/SC3 "Environmental Test Catalog". Due to the different controlled objects of its products, the use places of combustible gas alarm controllers are more limited and special. Therefore, the compilation principle of this standard focuses on the requirements for product safety and reliability. This standard is a mandatory standard. From the date of entry into force of the standard, all combustible gas alarm controller products should comply with this standard. This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the Sixth Technical Committee of the National Fire Protection Standardization Technical Committee. This standard was drafted by the Shenyang Fire Science Research Institute of the Ministry of Public Security. The main drafters of this standard are: Dou Baodong, Liu Meihua, and Yang Bo. 458
1 Scope
National Standard of the People's Republic of China
Technical requirements and test methods for combustibic gas alarm control unitsGB16808-1997
This standard specifies the technical requirements, test methods, product classification and marking of combustible gas alarm control units. This standard applies to combustible gas alarm controllers installed in general industry and civil buildings. Combustible gas alarm controllers with special performance installed in other environments shall also comply with this standard, except for special requirements that shall be separately specified by relevant standards. 2. Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB2423.1-89 Basic environmental test procedures for electric and electronic products Test A: Low temperature test method GB2423.2-89 Basic environmental test procedures for electric and electronic products Test B: High temperature test method GB/T2423.3-93 Basic environmental test procedures for electric and electronic products Test Ca: Steady state damp heat test method GB/T2423.5--1995 Environmental testing for electric and electronic products Part 2: Test methods Test Ea and guidance: Shock GB/T2423.10--1995 Environmental testing for electric and electronic products Part 2: Test methods Test Fc and guidance: Vibration (sinusoidal)
GB/T61131995 Specification for electromagnetic interference and immunity measuring equipment 3 Technical requirements
3.1 If the main power supply is AC power supply, it should use 220V, 50Hz. 3.2 Basic functional requirements
3.2.1 It can power the combustible gas detector and other connected components. 3.2.2 It can directly or indirectly receive alarm signals from combustible gas detectors and other alarm triggering devices, send out sound and light alarm signals, indicate the alarm location and maintain it. The alarm signal should be able to be manually eliminated, and the alarm signal should be able to be sent out when the alarm number is input again. 3.2.3 The combustible gas alarm controller with combustible gas concentration display should be able to display the current combustible gas concentration value, and its full-scale indication deviation should not exceed ±5%1EL.
3.2.4 In any of the following circumstances, the combustible gas alarm controller should be able to send out an audible and visual fault signal that is clearly different from the combustible gas alarm signal within 100 seconds:
a) The connecting line between the combustible gas alarm controller and the combustible gas detector and the connected alarm trigger is broken or short-circuited; b) The internal components of the combustible gas detector fail; c) The main power supply of the combustible gas alarm controller is undervoltage; d) The connecting line between the charger for charging the backup power supply of the combustible gas alarm controller and the backup power supply is broken or short-circuited: Approved by the State Bureau of Technical Supervision on May 28, 1997, and implemented on December 1, 1997
GB 16808-
e) The connecting line between the combustible gas alarm controller and its backup power supply is broken. For a) and b) faults, the location should be indicated; for c) d) and e) faults, the type should be indicated; the acoustic fault signal should be able to be manually eliminated, and the optical fault signal should be able to be maintained during the fault. During the fault, if there is a combustible gas alarm signal input to the non-fault circuit, the combustible gas alarm controller should be able to send out a combustible gas alarm signal. 3.2.5 The combustible gas alarm controller should be able to perform functional checks on the indicator lights, displays and sounders on its panel (the output control contacts should not operate during the check).
3.2.6 The combustible gas alarm controller should have the function of recording the combustible gas alarm time. The daily timing error of the timing device should not exceed 30s.
3.2.7 The combustible gas alarm controller should have a low limit alarm or a low and high limit two-stage alarm function. 3.2.8 For combustible gas alarm controllers that can change the alarm action value of the combustible gas detector connected to it, it should be able to indicate the set alarm action value of the combustible gas detector.
3.2.9 Except for manually eliminating the sound signal, other operating functions of the combustible gas alarm controller should be performed using a key or password. 3.2.10 The combustible gas alarm controller should have a power switching function. When the main power is cut off, it can automatically switch to the backup power supply: when the main power is restored, it can automatically switch to the main power supply, and the working status of the main and backup power supplies should be indicated. The switching of the main and backup power supplies should not cause the combustible gas alarm controller to send out a combustible gas alarm signal. The main power supply capacity should be able to ensure that the combustible gas alarm controller can operate normally for 2 hours under the following maximum load conditions:
a) When the capacity of the combustible gas alarm controller does not exceed 4 circuits (hereinafter referred to as loops) constituting a single part number, all loops are in the alarm state,
b) When the capacity of the combustible gas alarm controller exceeds 4 loops, 20% of the loops (not less than 4 loops, but not more than 10 loops) are in the alarm state.
3.2.11 The combustible gas alarm controller should be equipped with output contacts for controlling automatic fire-fighting equipment or for other purposes. Its capacity and parameters should be described in the relevant technical documents, and it should be guaranteed to operate reliably within the specified range. 3.2.12 The combustible gas alarm controller using numbers and letters shall also meet the following requirements: a) The combustible gas alarm controller shall be able to display the status change information from each circuit; b) The combustible gas alarm controller shall be able to display the total number of current alarm locations; c) The combustible gas alarm controller shall be able to distinguish the first alarm location; d) The combustible gas alarm controller shall be able to clearly display and distinguish the combustible gas alarm signal and the fault signal; e) When the combustible gas alarm controller displays the fault signal, if there is a combustible gas alarm signal input, the combustible gas alarm signal shall be displayed immediately.
3.3 The combustible gas alarm controller shall be able to withstand the various tests under the climatic and environmental conditions specified in Table 1. The performance during and after the test shall meet the requirements of the relevant tests in Section 4 of this standard. 1
Climate environment test
Test name
High temperature test
Low voltage test
Steady temperature test
Test parameters
Duration
Duration
Relative humidity
Duration time
Test conditions
Working state
No power on state 14h
Normal digital state 2h
No power on state 14h
Normal monitoring state 2 h
Normal monitoring state
3.4 The combustible gas alarm controller shall be able to withstand the various tests under the mechanical environmental conditions specified in Table 2. The performance during and after the test shall meet the requirements of the relevant tests in Chapter 4 of this standard. 460
Test name
Vibration (sinusoidal) test
Impact test
Collision test
Note: m is the mass of the sample.
GB16808-1997
Test parameters
Frequency series cycle range
Acceleration amplitude
Sweep rate
Frequency sweep on each axis
Number of cycles
Moving direction
Acceleration ()
Pulse duration
Number of impacts
Collision energy
Number of collision avoidance
Mechanical environmental test
Test conditions
10~150-~10 Hz
1 octave/min
100-20m
6 surfaces, 18 times in total
Half sine wave
0. 5J -t: 0. 04J
3 times for each vulnerable point
Working state
Power-on state
De-power-on state
De-power-on state
Normal monitoring state
3.5 The combustible gas alarm controller shall be able to withstand the various tests under the electrical interference environment conditions specified in Table 3. The performance during and after the test shall meet the requirements of the relevant tests in Chapter 4 of this standard. Table 3 Electrical interference environment test
Test nameWww.bzxZ.net
Radiated electromagnetic field test
Electrostatic discharge test
Electrical transient pulse test
Power supply transient test
Test parameters
Frequency
Discharge voltage
Effective discharge times
Transient pulse voltage
Power supply transient mode
Application times
Application mode
Test conditions
1 MHz--1 GHz
8 000 V
AC power line 2kV
Other connecting lines 1kv
Positive, negative
1min each time, 3 times in total
Power on 9s, power off 1$
500 times
6 times/min
Working state
Normal monitoring state
Normal blue vision state
Normal monitoring state
Normal monitoring state
3.6 When the voltage fluctuation of the AC power grid does not exceed 9% of the rated voltage (220V) and the frequency deviation does not exceed 1% of the standard frequency (50Hz), the combustible gas alarm controller should be able to work normally under the conditions of maximum load, longest wiring and minimum wire diameter. 3.7 The insulation resistance between the external live terminals and the casing of the combustible gas alarm controller with insulation requirements, and between the power plug (or power wiring terminal) and the casing should be greater than 20M0 and 50M0 respectively under normal weather conditions. The above parts should also be subjected to a withstand voltage test of 1 minute of AC current with a rated voltage of 50Hz and a voltage of 1500V (effective value, when the rated voltage exceeds 50V) or 500V (effective value, when the rated voltage does not exceed 50V). The performance during and after the test should meet the requirements of the relevant tests in Chapter 4 of this standard. 3.8 The indicator lights should be marked with colors, red for alarm signals; yellow for fault signals; and green for normal operation of the main power supply and backup power supply. Under normal ambient light conditions, the indicator lights should be visible at a distance of 3m. 3.9 Alphanumeric display
GB16808-1997
Under normal ambient light conditions, the alphanumeric display should be readable at 0.8m. 3.10 Electronic components
should be treated with three protections (moisture-proof, mildew-proof, and salt spray-proof), and the parameters should meet the requirements of the maximum operating voltage and maximum operating current. 3.11 Fuse
The rated current of fuses or other overcurrent protection devices used in power supply lines should generally not exceed 2 times the maximum working current of the combustible gas alarm controller. When the maximum working current is above 6A, the current value of the fuse can be 1.5 times of it. In places close to fuses or other overcurrent protection devices, their parameter values should be clearly marked. 3.12 Sound Devices
At the rated working voltage, the sound pressure level (A-weighted) of the sound device should be above 65dB and below 115dB at a distance of 1m from the center of the sound device. It should be able to make a sound under 85% of the rated working voltage. 3.13 Backup power supply
3.13.1 If the backup power supply adopts a battery, the battery capacity should be able to provide the combustible gas alarm controller to work for 2 hours under the monitoring state and work normally for 20 minutes under the following conditions:
a) When the capacity of the combustible gas alarm controller does not exceed 2 circuits, it is under the maximum load condition. b) When the capacity of the combustible gas alarm controller exceeds 2 circuits, 10% of the circuits (not less than 2 circuits, but not more than 5 circuits) are in the alarm state.
3.13.2 The positive connection wire of the power supply is red, and the negative pole is black or blue. 3.13.3 Under the condition of not exceeding the limit discharge specified by the manufacturer, the battery should be able to be charged and restored to normal state within 48 hours. 3.13.4 Non-sealed batteries should not be used. 3.14 The housing of the combustible gas alarm controller should be equipped with a grounding terminal. 4 Test method
The test procedure of the combustible gas alarm controller is shown in Table 4. Table 4 Test procedure table
Test procedure
Item number
Test items
Basic function test
Power-on test
Power supply test
Electrical transient pulse test
Power supply transient test
Insulation resistance test
Voltage test
Electrostatic effect test
Note: √ indicates that the sample is subjected to this test. Sample number
Item number
Test procedure
Test items
Radiated electromagnetic field test
Output contact action test
High temperature test
Low temperature test
Vibration (sinusoidal) test
Impact test
Steady-state damp heat test
Collision test
Sample number
4.2 The tests specified in this standard are type tests. The number of samples of the tested products shall be no less than three and shall be numbered before the test. 4.3 In Table 4, the first test must be carried out first. 4.4 The combustible gas alarm controller under test (hereinafter referred to as the sample) shall be inspected for appearance before the test. The test can be carried out only when it meets the following requirements:
a) There is no corrosion on the surface, peeling and blistering of the coating layer, and no obvious mechanical damage such as scratches, cracks, burrs, etc.; b) The fastening parts are not loose. The control mechanism should be flexible; 462
c) The text symbols and signs are clear.
GB16808—1997
4.5 If there is no explanation in the relevant provisions, all tests shall be carried out under the following normal atmospheric conditions: temperature 15℃～35℃;
Relative humidity: 45%～75%;
Atmospheric pressure: 86~106ka.
4.6 If there is no explanation in the relevant provisions, the tolerance of each test data is ±5%. 4.7 When it is not feasible to test a large sample as a whole, it is allowed to divide the sample into several parts for testing. 4.8 Basic Function Test
4.8.1 Purpose
To test the basic functions of the combustible gas alarm controller. 4.8.2 Requirements
The basic functions of the combustible gas alarm controller shall meet the requirements of Article 3.2. 4.8.3 Method
4.8.3.1 According to the requirements of the normal monitoring state, connect at least two circuits in the sample alarm circuit to the real load, and connect the other circuits to the equivalent load respectively, and turn on the power to put the sample in the normal monitoring state. 4.8.3.2 Put any circuit in the alarm state, observe and record the sample sound and light alarm signals and timing or printing conditions, observe and record the combustible gas concentration display and alarm conditions of the sample. 4.8.3.3 Put any circuit in the alarm state, first manually eliminate the sound alarm signal, and then put another circuit in the alarm state, observe and record the sample sound and light alarm signals. For the sample using an alphanumeric display, it should also be manually operated to display the received combustible gas alarm signal, and record the total number of alarm locations, the first alarm indication, etc. 4.8.3.4 When the sample is in the alarm state, first cancel the input alarm signal of the alarm circuit, then operate the manual reset mechanism, observe and record the sound and light alarm signals of the sample.
4.8.3.5 Make any circuit, power supply, and internal circuit of the sample in a fault state, and then operate the manual mute and reset mechanism for each state in turn, observe and record the sample sound and light signals and the indication of the fault location and type. For the sample with alphanumeric display, another part should also be put into a fault state, and the display changes should be observed and recorded. 4.8.3.6 When the sample is in a fault state, first eliminate the fault, then operate the manual reset mechanism (do not operate the automatic reset sample), and observe and record the sample sound and light signals.
4.8.3.7 When the sample is in a fault state, make the non-fault circuit in an alarm state, and observe and record the sample sound and light alarm signals.
4.8.3.8 Operate the sample audio device and indicator light, and the display inspection mechanism, observe and record the sample sound and light alarm signals. During the first basic function test, the action of the output contacts used to control the external device should also be checked. 4.8.3.9 Cut off the main power supply first, and then restore it to normal, and observe and record the main power supply and backup power supply conversion and working power supply indication.
4.8.3.10 Switch the main power supply to the backup power supply and repeat the test process of 4.8.3.2~~4.8.3.8. 4.9 Power-on test
4.9.1 Purpose
To test the stability of the operation of the combustible gas alarm controller under normal atmospheric conditions. 4.9.2 Requirements
4.9.2.1 During the test, the sample should not issue an alarm or fault signal. 4.9.2.2 After the test, the performance of the sample should meet the requirements of 4.8.2. 4.9.3 Method
Connect the sample to the equivalent load as required in the normal monitoring state. Turn on the power supply to put the sample in the normal monitoring state and run it continuously for 28 days. At the end of the test, the basic function test of the sample shall be carried out according to the provisions of 4 and 8. 463
4.10 Power supply test
4.10.1 Purpose
GB16808--1997
To test the adaptability of the combustible gas alarm controller to the fluctuation of the AC power supply voltage and the load change and the capacity of the power supply. 4.10.2 Requirements
4.10.2.1 The main power supply shall meet the requirements of 3.2.10 and 3.6. 4.10.2.2 After the main power supply test, the performance of the sample shall meet the requirements of 4.8.2. 4.10.2.3 The backup power supply shall meet the requirements of 3.13. 4.10.3 Method
4.10.3.1 Main power supply test
a) According to the maximum working current, the longest wiring and the minimum wire diameter requirements provided by the manufacturer, connect the sample to the equivalent load and the test device. Turn on the power supply of the test device and adjust the test device so that the input voltage of the sample is 220V (50Hz). Observe and record the working condition of the sample. b) Adjust the test device so that the input voltage of the sample is 187V (50Hz). Observe and record the working condition of the sample. Adjust the test device so that the input voltage of the sample is 242V (50Hz). Observe and record the working condition of the sample. c) Power the sample with the main power supply and make it work continuously for 2 hours under the condition of maximum working current, observe and record the working condition of the sample, then restore the sample to the monitoring state, and conduct basic function test on the sample according to the provisions of Article 4.8. 4.10.3.2 Backup power supply test
Power the sample with the backup power supply and make it work for 2 hours under the normal monitoring state, then make the sample with a capacity of no more than 2 circuits work for 20 minutes under the condition of maximum load, and make the sample with a capacity of more than 2 circuits work for 20 minutes under the condition that one-tenth of the circuit (no less than 2 circuits, but no more than 5 circuits) is in the alarm state. Then, cut off the sound alarm signal, put any circuit that was originally in the monitoring state in the alarm state, and observe and record the working conditions of the sample. 4.10.3.3 At the end of the test, perform basic functional tests on the sample in accordance with the provisions of Article 4.8. 4.11 Electrical transient pulse test
4.11.1
Inspect the ability of the combustible gas alarm controller to resist electrical transient pulse interference. 4.11.2 Requirements
4.11.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.11.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.11.3 Method
4.11.3.1 Connect the sample to the equivalent load as required for the normal monitoring state. Turn on the power supply to put the sample in the normal monitoring state. 4.11.3.2 Apply a positive and negative polarity transient pulse voltage of 2000V ± 10% and a frequency of 2.5kHz ± 20% to the AC power line of the sample (see Figure 1 for waveform); apply a transient pulse voltage of 15ms every 300ms (see Figure 2); each time the transient pulse voltage is applied is 60s ± 10s, and it is applied three times in total. The time interval between the two transient pulse voltages is 10s. During the test, monitor whether the sample issues an alarm and fault signal. 4.11.3.3 Apply a positive and negative polarity transient pulse voltage of 1000V ± 10% and a frequency of 5kHz ± 20% to the other external connecting lines of the sample (see Figure 1 for waveform); apply a transient pulse voltage of 15ms every 300ms (see Figure 2); each time the transient pulse voltage is applied is 60s ± 10s, and it is applied three times in total. The time interval between the two transient pulse voltages is 10s. During the test, monitor whether the sample sends out alarm and fault signals. 4.11.3.4 After the test, perform basic function test on the sample according to the provisions of 4.8. 464
4.11.4 Test equipment
5ns±30%
GB16808-1997
50ns±30%
Figure 150α Single pulse waveform under load
Transient pulse
Repetition period (depending on transient pulse voltage) The number of pulses is determined by the frequency
Figure 2 Group transient pulse waveform
Transient generator: output transient pulse voltage 1000V10%, 2000V±10%, pulse frequency 5kHz±20%, 2.5kHz±20%, output impedance 50Ω, output 15ms transient pulse voltage every 300ms, polarity is positive and negative. Its electrical schematic diagram is shown in Figure 3. The coupling/decoupling network and coupling device used in the test are shown in Figures 4 and 5. 165
GB16808
—1997
Transient generation control
Figure 3 Electrical schematic diagram of electrical transient pulse generator
U High voltage power supply; R. Charging resistor; C. Energy storage capacitor; R. ·Pulse shaping resistor; R.-Impedance remote resistor; Ca-DC blocking capacitor
Signal from transient pulse generator
Filter
High voltage coaxial
Connection terminal
Zi>100μH
Decoupling part
Ferrite
Ce=33nF
Coupling part
Figure 4 Coupling/decoupling network for AC power line test 1000
Paste board
Reference ground terminal
Dimension unit: mm
High-voltage coaxial
Connection terminal
The grounding plate area is at least
Insulating leg
1m2 and each side is 0.1m longer than the coupling
Both sides
Figure 5 Coupling device for testing other external connecting lines 4.12 Power transient test
4.12.1 And
GB16808-1997
Test the ability of the combustible gas alarm controller to resist power transient interference. 4.12.2 Requirements
4.12.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.12.2.2 After the test, the performance of the sample should meet the requirements of 4.8.2. 4.12.3 Method
Connect the sample to the equivalent load according to the requirements of the normal monitoring state. Connect the sample to the power transient test device and put the sample in the normal monitoring state first.
Turn on the test device and make the main power of the sample switch on and off continuously for 500 times according to the fixed procedure of "power on (9s)-power off (1s)", and observe and record the sound and light alarm signals of the sample.
After the test, carry out basic function test on the sample according to the provisions of Article 4.8. 4.12.4 Test equipment
Power supply device that can produce the test conditions that meet the requirements of Article 4.12.3. 4.13 Insulation resistance test
4.13.1 Self-test the insulation performance of the combustible gas alarm controller. 4.13.2 Requirements
4.13.2.1 The insulation resistance between the external live terminals of the specimen and the housing shall be greater than 20M0. 4.13.2.2 The insulation resistance between the power plug of the specimen and the housing (the power switch is in the on position, but the power plug is not connected to the power grid) shall be greater than 50M0.
4.13.3 Methods
Use the insulation resistance test device to apply 500V±50V DC voltage to the following parts of the sample respectively for 60s±5s, and then measure the insulation resistance value.
a) Between the external live terminals with insulation requirements and the housing; b) Between the power plug (or power wiring terminal) and the housing (the power switch is in the on position, but the power plug is not connected to the power grid). During the test, it should be ensured that the contact points have reliable contact, and the insulation resistance between the leads should be large enough to ensure correct readings. 4.13.4 Test equipment
An insulation resistance test device that meets the following technical requirements (in the absence of a special test device, a megohmmeter or shaker can be used for testing).
Test voltage: 500V±50VDC;
Measurement range: 0500M2;
Minimum scale: 0.1M0;
Timer: 60s±5%
4.14 Withstand voltage test
4.14.1 The withstand voltage performance of the combustible gas alarm controller shall be tested on the day of the test. 4.14.2 Requirements
4.14.2.1 During the test, the sample shall not have leakage current greater than 5mA and breakdown. 4.14.2.2 After the test, the performance of the sample shall meet the requirements of Article 4.8.2. 4.14.3 Method
Use the withstand voltage test device to apply a test voltage of 50Hz, 1500V±10% (when the rated voltage exceeds 50V) or 50Hz, 500V±10% (when the rated voltage does not exceed 50V) to the following parts of the sample at a voltage rise rate of 100~500V/s. 467
GB16808—1997
a) Between all external live terminals with insulation requirements and the housing; b) Between the power plug (or power wiring terminal) and the housing (the power switch is in the on position, but the power plug is not connected to the power grid). Continue for 60s±5s, observe and record the phenomena that occur during the test. After the test, the voltage is gradually reduced to a value lower than the rated voltage at a voltage reduction rate of 100~~500V/s, and then the power can be turned off, and then the basic function test of the sample is carried out according to the provisions of Article 4.8. 4.14.4 Test equipment
A withstand voltage test device that meets the following technical requirements. Test power supply: voltage 0~1500V (effective value) continuously adjustable, frequency 50Hz; voltage rise (fall) rate: 100~500V/s
Timing: 60s±5s.
4.15 Electrostatic discharge test
4.15.1 Purpose
To test the adaptability of the combustible gas alarm controller to electrostatic discharge caused by contact with static electricity personnel and objects. 4.15.2 Requirements
4.15.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.15.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.15.3 Method
4.15.3.1 Place the sample on the test grounding plate. The distance between its periphery and each side of the grounding plate should not be less than 100mm. 4.15.3.2 Adjust the output voltage of the electrostatic generator to 8000V, charge the electrostatic discharge probe connected to a 150pF capacitor and a 1500 resistor to 8000V, and discharge the sample through the 150 resistor. Immediately after each charge, the electrostatic discharge probe should be touched to a test point on the outside of the sample. Regardless of whether arc discharge occurs, the tip of the probe must be in contact with the test point. Electrostatic discharge should be performed point by point at 10 different points on the outer surface of the sample (5 points on the control mechanism or keyboard, 1 point at the input/output line 150mm away from the sample, 1 point on the housing farthest from the ground wire, 1 point on the power switch, and 2 points on the display and indicator light). The time interval between each discharge is at least 1s.
4.15.3.3 During the test, monitor whether the sample issues an alarm and an irreversible fault signal; after the test, perform a basic functional test on the sample in accordance with the provisions of Article 4.8.
4.15.4 Test equipment
4.15.4.1 Electrostatic generator: Output voltage 8000V ± 10%, its electrical schematic diagram is shown in Figure 6. Output current waveform is shown in Figure 7. 4.15.4.2 Electrostatic discharge probe: The discharge end is a $8 sphere, and the connector and the rear hemisphere are covered with insulating material. 4.15.4.3 Grounding wire: The DC power supply and the grounding wire of the electrostatic discharge probe used in the electrostatic discharge test must be connected to the safety grounding wire or grounding plate together with the grounding plate.
16.5kV= 150pF
Figure 6 Electrostatic generator electrical schematic diagram
. Discharge probe
. Safety ground wire
4.16 Radiated electromagnetic field test
4.16.1 Purpose
GB16808-1997
5ns±30%
30ns±30%
Figure 7 Output current waveform of electrostatic generator
To test the adaptability of the combustible gas alarm controller to work in the radiated electromagnetic field environment. 4.16.2 Requirements
4.16.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.16.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.16.3 Method
4.16.3.1 Place the sample on the insulating table and connect the sample to the equivalent load according to the requirements of the normal monitoring state. Turn on the power supply to put the sample in the normal monitoring state.
4.16.3.2 Connect the test equipment according to Figure 8, place the transmitting antenna in the middle, and place the sample and the electromagnetic interference meter 1m on both sides of the transmitting antenna.
Adjust the output of the 1MHz~1GHz power signal generator so that the reading of the electromagnetic interference meter is 10V/m. During the test, the frequency should change slowly at a rate not greater than 0.005 octave/s within the frequency range of 1MHz~1GHz. At the same time, the sample should be rotated, and the sample operation should be observed and recorded. If the transmitting antenna used is directional, the transmitting antenna should be aligned with the electromagnetic interference meter antenna first, and the output of the power signal generator should be adjusted to 10V/m. Then, the transmitting antenna should be reversed and aligned with the sample for testing. In the frequency range of 1MHz~1GHz, the test should be carried out with the horizontal polarization and vertical polarization of the antenna respectively. 4.16.3.4 During the test, monitor whether the sample sends out alarms and irreversible fault signals. After the test, perform basic functional tests on the sample in accordance with the provisions of Article 4.8.
4.16.3.5 The test should be carried out in a shielded room. To avoid large measurement errors, the position of the antenna should comply with the requirements of Figure 9. 1II
Test sample
Transmitting antenna
Electromagnetic interference measuring instrument
【Power signal generator
Figure 8 Layout of test equipment4 Test equipment
A withstand voltage test device that meets the following technical requirements. Test power supply: voltage 0~1500V (effective value) continuously adjustable, frequency 50Hz; voltage rise (fall) rate: 100~500V/s
Timing: 60s±5s.
4.15 Electrostatic discharge test
4.15.1 Purpose
To test the adaptability of the combustible gas alarm controller to electrostatic discharge caused by contact with static electricity personnel and objects. 4.15.2 Requirements
4.15.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.15.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.15.3 Method
4.15.3.1 Place the sample on the test grounding plate. The distance between its periphery and each side of the grounding plate should not be less than 100mm. 4.15.3.2 Adjust the output voltage of the electrostatic generator to 8000V, charge the electrostatic discharge probe connected to a 150pF capacitor and a 1500 resistor to 8000V, and discharge the sample through the 150 resistor. Immediately after each charge, the electrostatic discharge probe should be touched to a test point on the outside of the sample. Regardless of whether arc discharge occurs, the tip of the probe must be in contact with the test point. Electrostatic discharge should be performed point by point at 10 different points on the outer surface of the sample (5 points on the control mechanism or keyboard, 1 point at the input/output line 150mm away from the sample, 1 point on the housing farthest from the ground wire, 1 point on the power switch, and 2 points on the display and indicator light). The time interval between each discharge is at least 1s.
4.15.3.3 During the test, monitor whether the sample issues an alarm and an irreversible fault signal; after the test, perform a basic functional test on the sample in accordance with the provisions of Article 4.8.
4.15.4 Test equipment
4.15.4.1 Electrostatic generator: Output voltage 8000V ± 10%, its electrical schematic diagram is shown in Figure 6. Output current waveform is shown in Figure 7. 4.15.4.2 Electrostatic discharge probe: The discharge end is a $8 sphere, and the connector and the rear hemisphere are covered with insulating material. 4.15.4.3 Grounding wire: The DC power supply and the grounding wire of the electrostatic discharge probe used in the electrostatic discharge test must be connected to the safety grounding wire or grounding plate together with the grounding plate.
16.5kV= 150pF
Figure 6 Electrostatic generator electrical schematic diagram
. Discharge probe
. Safety ground wire
4.16 Radiated electromagnetic field test
4.16.1 Purpose
GB16808-1997
5ns±30%
30ns±30%
Figure 7 Output current waveform of electrostatic generator
To test the adaptability of the combustible gas alarm controller to work in the radiated electromagnetic field environment. 4.16.2 Requirements
4.16.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.16.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.16.3 Method
4.16.3.1 Place the sample on the insulating table and connect the sample to the equivalent load according to the requirements of the normal monitoring state. Turn on the power supply to put the sample in the normal monitoring state.
4.16.3.2 Connect the test equipment according to Figure 8, place the transmitting antenna in the middle, and place the sample and the electromagnetic interference meter 1m on both sides of the transmitting antenna.
Adjust the output of the 1MHz~1GHz power signal generator so that the reading of the electromagnetic interference meter is 10V/m. During the test, the frequency should change slowly at a rate not greater than 0.005 octave/s within the frequency range of 1MHz~1GHz. At the same time, the sample should be rotated, and the sample operation should be observed and recorded. If the transmitting antenna used is directional, the transmitting antenna should be aligned with the electromagnetic interference meter antenna first, and the output of the power signal generator should be adjusted to 10V/m. Then, the transmitting antenna should be reversed and aligned with the sample for testing. In the frequency range of 1MHz~1GHz, the test should be carried out with the horizontal polarization and vertical polarization of the antenna respectively. 4.16.3.4 During the test, monitor whether the sample sends out alarms and irreversible fault signals. After the test, perform basic functional tests on the sample in accordance with the provisions of Article 4.8.
4.16.3.5 The test should be carried out in a shielded room. To avoid large measurement errors, the position of the antenna should comply with the requirements of Figure 9. 1II
Test sample
Transmitting antenna
Electromagnetic interference measuring instrument
【Power signal generator
Figure 8 Layout of test equipment4 Test equipment
A withstand voltage test device that meets the following technical requirements. Test power supply: voltage 0~1500V (effective value) continuously adjustable, frequency 50Hz; voltage rise (fall) rate: 100~500V/s
Timing: 60s±5s.
4.15 Electrostatic discharge test
4.15.1 Purpose
To test the adaptability of the combustible gas alarm controller to electrostatic discharge caused by contact with static electricity personnel and objects. 4.15.2 Requirements
4.15.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.15.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.15.3 Method
4.15.3.1 Place the sample on the test grounding plate. The distance between its periphery and each side of the grounding plate should not be less than 100mm. 4.15.3.2 Adjust the output voltage of the electrostatic generator to 8000V, charge the electrostatic discharge probe connected to a 150pF capacitor and a 1500 resistor to 8000V, and discharge the sample through the 150 resistor. Immediately after each charge, the electrostatic discharge probe should be touched to a test point on the outside of the sample. Regardless of whether arc discharge occurs, the tip of the probe must be in contact with the test point. Electrostatic discharge should be performed point by point at 10 different points on the outer surface of the sample (5 points on the control mechanism or keyboard, 1 point at the input/output line 150mm away from the sample, 1 point on the housing farthest from the ground wire, 1 point on the power switch, and 2 points on the display and indicator light). The time interval between each discharge is at least 1s.
4.15.3.3 During the test, monitor whether the sample issues an alarm and an irreversible fault signal; after the test, perform a basic functional test on the sample in accordance with the provisions of Article 4.8.
4.15.4 Test equipment
4.15.4.1 Electrostatic generator: Output voltage 8000V ± 10%, its electrical schematic diagram is shown in Figure 6. Output current waveform is shown in Figure 7. 4.15.4.2 Electrostatic discharge probe: The discharge end is a $8 sphere, and the connector and the rear hemisphere are covered with insulating material. 4.15.4.3 Grounding wire: The DC power supply and the grounding wire of the electrostatic discharge probe used in the electrostatic discharge test must be connected to the safety grounding wire or grounding plate together with the grounding plate.
16.5kV= 150pF
Figure 6 Electrostatic generator electrical schematic diagram
. Discharge probe
. Safety ground wire
4.16 Radiated electromagnetic field test
4.16.1 Purpose
GB16808-1997
5ns±30%
30ns±30%
Figure 7 Output current waveform of electrostatic generator
To test the adaptability of the combustible gas alarm controller to work in the radiated electromagnetic field environment. 4.16.2 Requirements
4.16.2.1 During the test, the sample should not issue an alarm or an irreversible fault signal. 4.16.2.2 After the test, the performance of the sample should meet the requirements of Article 4.8.2. 4.16.3 Method
4.16.3.1 Place the sample on the insulating table and connect the sample to the equivalent load according to the requirements of the normal monitoring state. Turn on the power supply to put the sample in the normal monitoring state.
4.16.3.2 Connect the test equipment according to Figure 8, place the transmitting antenna in the middle, and place the sample and the electromagnetic interference meter 1m on both sides of the transmitting antenna.
Adjust the output of the 1MHz~1GHz power signal generator so that the reading of the electromagnetic interference meter is 10V/m. During the test, the frequency should change slowly at a rate not greater than 0.005 octave/s within the frequency range of 1MHz~1GHz. At the same time, the sample should be rotated, and the sample operation should be observed and recorded. If the transmitting antenna used is directional, the transmitting antenna should be aligned with the electromagnetic interference meter antenna first, and the output of the power signal generator should be adjusted to 10V/m. Then, the transmitting antenna should be reversed and aligned with the sample for testing. In the frequency range of 1MHz~1GHz, the test should be carried out with the horizontal polarization and vertical polarization of the antenna respectively. 4.16.3.4 During the test, monitor whether the sample sends out alarms and irreversible fault signals. After the test, perform basic functional tests on the sample in accordance with the provisions of Article 4.8.
4.16.3.5 The test should be carried out in a shielded room. To avoid large measurement errors, the position of the antenna should comply with the requirements of Figure 9. 1II
Test sample
Transmitting antenna
Electromagnetic interference measuring instrument
【Power signal generator
Figure 8 Layout of test equipment5 The test should be carried out in a shielded room. To avoid large measurement errors, the position of the antenna should comply with the requirements of Figure 9. 1II
Test sample
Transmitting antenna
Electromagnetic interference measuring instrument
【Power signal generator
Figure 8 Layout of test equipment5 The test should be carried out in a shielded room. To avoid large measurement errors, the position of the antenna should comply with the requirements of Figure 9. 1II
Test sample
Transmitting antenna
Electromagnetic interference measuring instrument
【Power signal generator
Figure 8 Layout of test equipment
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