Lightning detection equipment operation instructions
1. Scope of application
The lightning detection operation instructions are applicable to the lightning protection detection of new buildings, extensions, and reconstructed buildings, and also applicable to the annual inspections of conventional buildings.
This work instruction does not apply to buildings and structures other than those specified in Technical Specifications for Detection of Lightning Protection Devices in Buildings GB/T 21714-2105.
When testing buildings of the first type and the second type, they must obtain Class A qualifications for lightning protection testing issued by the competent authority.
2. Reference standards
"Technical Specifications for Detection of Lightning Protection Devices for Buildings" GB/T 21714-2105
"Building electronic information system lightning protection technical specification" GB 50343-2012
"Building lightning protection design specification" GB 50057-2010
3. Test equipment list
Serial number; name of instrument and equipment; main performance requirements
1. Laser Rangefinder: Range: 0-150m
2. Thickness gauge: Metal thickness measurement, ultrasonic
3. Theodolite: Range: 0-360°, Resolution: 2′′
4. Rally gauge: Range: 0-40kgf
5. Combustible gas tester: Applicable gas: Combustible gas
6. Grounding resistance tester: Test current: >20mA (sine wave), resolution: 0.01Ω
7. Land network tester: test current: >3A, resolution: 0.001~99.999Ω, frequency optional
8. Soil resistivity tester: four-wire measurement, test current: >20mA (sine wave) Resolution: 0.01 ohms
9. Equipotential tester: test current: ≥1A, four-wire test, resolution: 0.001Ω, with large capacity lithium battery
10. Loop resistance tester: resistance measurement resolution: 0.001Ω, current measurement resolution: 1μA
11. Lightning protection device tester: Test device: MOV, with large capacity lithium battery
12. Insulation resistance tester: 0-1000MΩ
13. Electromagnetic shielding test equipment: shield generator, shielded receiver
14. Spectrum Analyzer: 9 kHz ~ 6.2 GHz frequency range, -160 dBm ~ +20 dBm dynamic range
15. Surface Impedance Tester: Measuring Range: 103-1010Ω
16. Static potential tester: Measuring range: ±20kv
17. Remanent magnetic tester: static magnetic field strength measurement, range: 0-200mT
18. Gaussmeter: Range: 0-100mT
19. Infrared Thermometer: -60°C～860°C
20. Digital Multimeter: Voltage, Current, Resistance Measurement, Resolution: 3 and a half
21. High Performance Digital Multimeter: Voltage, Current, Resistance Measurement, Resolution: 6 and a half
22. Intelligent intercom terminal: including GPS positioning, talkback, voice calls, track positioning, image acquisition, transmission and other functions
23.GPS: GPS Positioning
24. Explosion-proof intercom: Explosion-proof intercom
25. Standard resistance: 10-3~105 ohms, power 1/2w, wirewound type
26. Steel tape measure: Resolution: 0.01m
27. Vernier caliper: Range: 0-150mm
Lightning detection equipment operation instructions
4. Detection classification
"Building lightning protection design specifications" GB 50057-2010 Article 3.0.1 provides: Buildings should be based on the importance of the building, the nature of the use, the possibility and consequences of the occurrence of lightning accidents, lightning protection requirements are divided into three categories.
Before the test, the length, width and height of the tested building shall be measured with a laser distance meter (SW-150). The formula in the number of predicted lightning strikes of the building in accordance with the “Building Design Rules for Lightning Protection” GB 50057-2010 Appendix A Calculate the expected number of lightning strikes per year, and then classify the measured buildings according to the provisions of 3.0.2, 3.0.3 and 3.0.4 of the “Code for Design of Buildings for Lightning Protection” (GB 50057-2010). After the mine category, the buildings of different lightning protection types specified in “Technical Specifications for Detection of Lightning Protection Devices for Buildings” GB/T 21714-2105 shall be separately tested.
Annual forecast of the number of lightning strikes:
N = k ×N g×A e
In the formula: N—the expected number of lightning strikes per year of the building (times/a);
K—correction coefficient, generally taken as 1; buildings located in riversides, lakesides, below hillside, or in mountainous areas where soil resistivity is small, groundwater outcrops, tops of soil hills, valley vents, etc., and particularly humid 1.5 for buildings; 1.7 for brick-and-wood buildings without metal grounding; 2 for isolated buildings located on hilltops or in wilderness;
N g—The annual average density of lightning strikes in the area where the building is located (times/km2/a);
A e - The equivalent area (km2) of the same number of lightning strikes as the building interception.
3.0.2 In areas where lightning strikes may occur, one of the following situations shall be classified as the first type of lightning protection structure:
3.0.4 In areas where lightning strikes may occur, one of the following situations shall be classified as a third type of lightning protection structure:
5. Detection period
Detection is divided into first detection and periodic detection. The first test is divided into the detection of the construction of the lightning protection device for the newly-built, rebuilt, and expanded buildings and the first detection of the lightning protection device of the building after being put into use. Periodic inspections are performed at regular intervals.
Newly built, rebuilt or expanded the detection of the construction of the lightning protection device of a building, and perform phased inspections on hidden structures such as its structure, arrangement, shape, material specifications, dimensions, connection methods and electrical properties. The first inspection of the lightning protection device of the building after being put into use shall be tested according to the requirements of the design drawings, except for the concealment works.
For the first class of lightning protection structures, the detection period is 6 months; if the classification is divided into the second and third type of lightning protection structures, the detection period is 12 months.
Lightning detection equipment operation instructions
6. Testing items
Regardless of the types of buildings classified as lightning protection, the inspection items should include the following items:
a. Lightning classification of buildings
b. Air receiver
c. Downstream
d. Grounding device
e. Division of lightning protection zones
f. Lightning electromagnetic pulse shield
g. Equipotential bonding
h. Surge protectors
7. Testing requirements and methods
7.1 Lightning Classification of Buildings
7.1.1 Instruments used in the test:
Laser Range Finder: SW-150, Measuring Construction Length, Length, Height
Theodolite: DE2A, measuring construction length, length, height
Steel tape measure: DL9150. Measuring construction length, money, height
7.1.2 Lightning Protection Classification of Buildings
Buildings should be classified into three categories according to the lightning protection requirements according to the importance of the buildings, the nature of their use, and the possibility and consequences of a lightning accident. The classification method shall be determined in accordance with Article 4 of this Operation Guideline or Article 3.0.2, 3.0.3, 3.0.4 and 4.5.1 of GB 50057-2010 and Appendix A of GB/T 21431-2015.
The calculation of the estimated number of lightning strikes per year in the lightning protection classification is detailed in the automatic calculation software "2010 Calculation of Lightning Strike Times Calculation for Building Lightning Protection Design Year".
Lightning detection equipment operation instructions
7.2 Air Receiver
7.2.1 Instruments used in the test:
Digital calipers: 111-101, measuring the specifications of the air-termination system, the length of the air-termination system;
Steel tape measure: DL9150, measuring the height of the air-termination device, the distance and height of the flash bracket.
Tensile force meter: HP-500, measuring the bearing capacity of the lightning protection bracket.
Equipotential tester: FW 3700P, measuring the transition resistance of the welding between the lightning receptors.
7.2.2 Requirements
7.2.2.1 The arrangement of the air-termination device shall comply with the requirements of Table 1. When arranging the air-termination device, the lightning rod, the flash belt and the flash network can be used alone or in any combination.
8. Table 1 Terminal Arrangement
Building lightning protection category Rolling ball radius hr (m) Grid connection mesh size (m)
The first type of lightning protection building 30 ≤ 5 × 5 or ≤ 6 × 4
The second type of lightning protection buildings 45 ≤ 10 × 10 or ≤ 12 × 8
The third type of lightning protection buildings 60 ≤ 20 × 20 or ≤ 24 × 16
7.2.2.2 The specification, structure, minimum cross-sectional area and installation method of the air-termination device are to comply with the provisions of 4.2.4, 4.3.1, 4.4.1 and 5.2 of GB 50057-2010.
7.2.3 Detection
7.2.3.1 When testing for the first time, use a vernier caliper to measure the diameter of the air-termination device and the length of the welding lap; its specifications shall comply with the requirements of Article 5.2 of the GB 50057-2010 air-termination system;
7.2.3.2 When testing for the first time, use a steel tape measure to measure the height of the flash belt, the distance between the flash bracket, and the size of the flash grid. The specifications should be consistent with Article 5.2 of GB 50057-2010 or Article 5.2.1.1 of GB/T 21431. Provisions.
The height of the fixed bracket should not be less than 150 mm.
The distance between the light-transmitting conductor and the underwire fixing bracket
Arrangement Method Spacing between flat conductor and strand fixing bracket (mm) Spacing of single round conductor fixing bracket (mm)
Horizontal conductor 500 1000 mounted on a horizontal surface
Horizontal conductor 500 1000 mounted on a vertical surface
Vertical conductor 1000 1000 mounted on the vertical surface from the ground to a height of 20 m
Vertical conductor 500 1000 mounted on vertical surfaces above 20 m
7.2.3.3 When testing for the first time, check whether the air-termination device has anti-corrosion treatment, whether the welding is full, whether the lap length meets the requirements of Article 6.2.4 of GB 50343-2012; whether the section is rusted by more than 1/3; on the air-termination device Whether other cables are wrapped around, whether the air terminal is overturned, broken, and whether the flash bracket is loosened, and whether the flash bracket can withstand a vertical tension of 49 N can be detected with a strain gauge HP-500.
7.2.3.4 When testing for the first time, it is necessary to measure and calculate whether the wind cap, discharge pipe, elevator room, etc. of the prominent sky surface are within the protection range of the air-termination device.
7.2.3.5 When testing for the first time, it is necessary to check whether the distance between the lightning rod and the wind cap and the discharge pipe meets the requirements of Article 4.2.1 of GB 50057-2010.
7.2.3.6 For a lightning protection structure belonging to the first category, the distance between the independent lightning rod and the ground of the protected building shall be greater than 3m.
7.2.3.7 High-rise buildings should not be equipped with a lightning receptor on the daughter's wall.
7.2.3.8 The flash belt shall be arranged along the direction of the parapet of the parapet at the corner. The angle of bending shall not be less than 90°, and the radius shall not be less than 10 times the diameter of the round steel and 6 times the width of the flat steel. When the flash zone passes through the settlement seam of the expansion joint, the flash zone shall be curved sideward to a radius of 100mm.
7.2.3.9 The smoke detector of the chimney shall comply with the provisions of 4.4.9 of GB 50057-2010.
7.2.3.10 The resistance of the welding of the air-termination device, the welding of the air-termination device and the down conductor shall not exceed 0.2Ω.
7.2.3.11 For details of unfinished items, refer to Article 5.2 of GB/T 21431-2015.
7.3 Downstream
7.3.1 Instruments used in the test:
Digital calipers: Measuring the specifications of downleads;
Steel tape measure: DL9150, measure the distance between the downlead, the distance between the lead and the electrical cable;
Tensile force meter: HP-500, measuring the bearing capacity of the lightning protection bracket.
Equipotential tester: FW 3700P, measuring the transition resistance between the downleads.
7.3.2 Detection
7.3.2.1 When testing for the first time, the hidden project records shall be checked to confirm whether the material, specification, quantity, connection method, location, etc., used as down conductors meet the requirements of the design drawings and the requirements for downgrading of Article 5.3 of GB 50057-2010.
7.3.2.2 Use a steel tape measure DL9150 to measure whether the spacing between the down conductors meets the following requirements:
Building lightning protection category spacing/m
The first type of lightning protection building ≤12
The second type of lightning protection buildings ≤18
The third type of lightning protection buildings 25
7.3.2.3 Using a digital caliper 111-101 to measure the specifications of the downlead, whether the lap length meets the requirements of Article 6.2.4 of GB 50057-2010 No. 5.3 and GB 50343-2012.
7.3.2.4 Check whether the lead wire has anti-corrosion measures, whether the cross-sectional area corrosion is less than 1/3, and whether the deflector wire is broken or loose. Check whether the external deflector bracket can withstand 49N force.
7.3.2.5 When applying external lead wires, it is also required to check whether the electrical cables are wrapped around and whether the parallel distance and the cross distance between the cable and the cables meet the requirements of 4.3.7 of GB 70057-2010.
7.3.2.6 External disconnectors shall be provided with disconnected cards. When multiple dedicated deflectors are used, disconnectors shall be installed on each deflector at a distance of 0.3 m to 1.8 m from the ground. When the use of reinforced concrete steel bars, steel columns as the natural downlead and the basic grounding body at the same time, there may be no disconnected cards, but when using steel as the downhole, a number of connecting plates should be set up at appropriate locations indoors or outdoors.
7.3.2.7 The downdraft of the chimney shall comply with the provisions of Article 4.4.9 of GB50057-2010.
7.3.2.8 For the welding between the down conductor and the grounding body and the lightning receptor, the transition resistance should not be more than 0.2Ω.
7.3.2.9 For details of pending projects, please refer to Article 5.3 of GB/T 21431-2015.
7.4 Grounding
7.4.1 Instruments used in the test
Equipotential tester: FW 3700P, measuring the transition resistance between the downleads.
Grounding resistance tester: FW-E08AP/FW-E08BP, measuring grounding resistance.
7.4.2 Detection
7.4.2.1 When testing for the first time, design drawings and hidden project records shall be checked to ensure that the material and specifications of the grounding device comply with the design requirements of the drawings and the provisions of Article 5.4 of GB 50057-2010.
7.4.2.2 When a building uses a common grounding body, its grounding resistance shall be in accordance with the minimum resistance required by the system. The grounding resistance should meet the requirements of the drawing design. In general, the grounding resistance of the common grounding body is less than 4Ω.
7.4.2.3 Structures with independent grounding bodies are classified as the first type of lightning protection structures, and the impact earthing resistance is not more than 10Ω, and they are divided into the second and third types of lightning protection buildings, and the impact earthing resistance is not more than 30Ω.
7.4.2.4 The newly built, expanded or reconstructed buildings shall be tracked and tested for grounding resistance. The grounding resistance of the reserved grounding point can be measured when measuring the grounding resistance of a structure that has already been put into use. When there is no reserve grounding point, it is possible to measure the grounding resistance of the grounding terminal strip in the building distribution cabinet or the grounding terminal strip of the power distribution in the first floor.
7.4.2.5 It is recommended to use the four-wire method when measuring the grounding resistance. The three-wire method can be used when the conditions are not available, but the wire resistance generated by the test cable should be eliminated before testing. Ground resistance tester FW-E08A/FW-E08B wire resistance calibration method see the instrument using the job instructions.
7.5 Division of Lightning Protection Zones
When detecting electronic information systems, the location of the electronic information system should first be divided into lightning protection zones.
1 All objects in this area may be directly struck by lightning and all lightning currents may be guided away. When the intensity of the lightning electromagnetic field in the area is not attenuated, it shall be divided into LPZ0A area.
2 The objects in this area cannot be directly struck by lightning currents corresponding to the radius of the selected ball, and if the intensity of the lightning electromagnetic field in the area is still not attenuated, they should be divided into LPZ0B areas.
3 The objects in the area cannot be directly struck by lightning. Due to the shunt at the interface, the surge current flowing through each conductor is smaller than that in the area of ​​LPZ0B, and the intensity of the lightning electromagnetic field in the area may be attenuated and attenuated. When the degree depends on shielding measures, it should be divided into LPZ1 area.
4 When it is necessary to further reduce the inrush current and lightning electromagnetic field intensity, the additional lightning protection zone should be divided into LPZ2...n follow-up lightning protection zone.
7.6 Lightning Electromagnetic Pulse Shielding
7.6.1 Instruments used in the test
Equipotential tester: FW 3700P, measuring the transition resistance between the downleads.
Grounding resistance tester: FW-E08AP/FW-E08BP, measuring grounding resistance.
Surface resistance tester: SL-030B, measuring the surface resistance of the anti-static floor.
Static voltage tester: FMX-003, measuring the static electricity voltage of the anti-static floor.
7.6.2 The system for detecting the distribution system is a TN-S system.
7.6.3 Detection The transition resistance between all exposed metal parts is not more than 0.2Ω (transition resistance of the first type lightning protection building is not more than 0.03Ω).
7.6.4 Test All exposed metal parts are grounded and the grounding resistance meets the design requirements.
7.6.5 Test the electrostatic voltage of the anti-static floor in the electronic information system room and the voltage value shall not exceed 1 kV.
7.6.6 Test the surface resistance of the anti-static floor of the electronic information system room, and the resistance value is 2.5*104-1.0*109.
7.6.7 The calculation and test of shielding effectiveness shall comply with the provisions of Article 6.3.2 of GB50057-2010 and the provisions of Article I.2.3 of Appendix I of GB/T 21431-2015.
7.7 Equipotentials
7.7.1 Instruments used in the test
Equipotential tester: FW 3700P measures the transition resistance of the connection between metal parts.
7.7.2 Detection
7.7.2.1 The detection of equipotentiality includes the direct equipotential of lightning strikes and the equipotential of lightning protection.
7.7.2.2 For the detection of equipotentiality of direct thunder and lightning protection measures, the transition resistance of all the lightning receptors on the roof (connecting the lightning rod, connecting the flash belt, and receiving the flash grid) is not more than 0.2Ω.
7.7.2.3 All uncharged metal on the roof shall be equipotentially connected to the air-termination device, and the transition resistance at the connection shall not exceed 0.2Ω.
7.7.2.4 Uncharged metal pipes in the bathroom shall be connected to the ground bar in the equipotential box reserved for the toilet. The transition resistance shall not exceed 0.2Ω.
7.7.2.5 Metals of power distribution cabinets, metal trays, and conduits in power distribution and distribution shafts are to be connected to the equipotential grounding terminal strip. The transition resistance is not more than 0.2Ω.
7.7.2.6 Equipotential terminal strips shall be installed in the information room, power distribution cabinets, metal cabinets, anti-static floor supports, UPS and battery cabinet enclosures, consoles, fiber reinforced ribs, etc. shall be equipotential grounded, and the transition resistance shall not be greater than 0.2Ω. .
7.7.2.7 For the connection of bends, valves, etc. in the second category of lightning protection structures in the first category and in explosive atmospheres, the transition resistance is not to exceed 0.03Ω.
7.8 surge protector
7.8.1 Instruments used in the test
Handheld SPD Field Tester: FW-SPD06, measures SPD starting voltage and leakage current.
Insulation resistance tester: FW 3050P, measures SPD insulation resistance.
7.8.2 Visual Inspection
7.8.2.1 Is there a power level SPD installed in the distribution system? (A-level needs to install four-level protection, B-level needs three-level protection, C-level needs two-level protection, D-level needs two-level protection), the classification of important levels is governed by GB 50343-2012 Section 4.3.1 ;
7.8.2.2 Does the SPD front-end have backup protection devices (air switches or fuses) with matching traffic? Generally, the SPD of a SPD matches the air-open 63A, the secondary-level matching 32A, and the three-level matching 20A or 16A.
7.8.2.3 The first-stage flow rate is not less than 12.5kA (10/350us), the second-level flow rate is not less than 5kA (8/20us), and the third level is not less than 3kA (8/20us).
7.8.2.4 Check whether the backup protection device before SPD is in a closed state. If it is disconnected, Party A shall promptly notify Party A to close it;
7.8.2.5 Is the SPD cable too long, and the phenomenon of warping, whether the wire diameter is in line with the requirements (a level not less than 6mm2, level 2 not less than 2.5mm2, level 3 not less than 1.5mm2, signal SPD not less than 1.2mm2);
7.8.2.6 If there is any change in the SPD indication window (red indicates tripping), Party A shall promptly notify the replacement;
7.8.2.7 Is there any trace of burnt appearance?
7.8.2.8 Check if the voltage protection level of the SPD is lower than the withstand voltage level of the protected equipment.
7.8.3 Startup Voltage and Leakage Current Detection
7.8.3.1 Be sure to disconnect the backup protection device before testing. The port on the SPD is in the powerless state.
7.8.3.2 According to the Uc test starting voltage (corresponding to the following table), the tolerance of the varistor is ±10%
7.8.3.3 Test leakage current (single chip is less than 20uA, when multiple chips are in parallel, less than 20 times MOV parallel)
Common SPD eligibility
Uc Nominal varistor voltage minimum value
150 240 222 270
175 275 256 310
275 430 287 473
320 510 459 561
385 620 558 682
420 680 612 748
510 820 738 902
550 910 819 1001
750 1200 1150 1320
7.8.4 Operation Guide
7.8.4.1 It is not necessary to remove the SPD when testing SPD's starting voltage and leakage current in the field, but please make sure to note the following precautions before testing:
a. The SPD test should be conducted with the property management of the testee or the designated electrician.
b. There should be a back-up protection device (air-open or fuse) in front of the SPD. If not, the SPD installation itself does not meet the requirements of the specification and is judged to be unqualified. If there is a backup protection device, please disconnect the protection device; if it is unclear which open or fuse is SPD backup protection device, it should be confirmed by Party A's property management personnel or electrician, or judge according to the route direction.
c. For safety, double confirmation is required. Even if the backup protection device is disconnected, the electric pen should be used to confirm whether the SPD's wiring port is energized and then tested.
d. Tester personnel should wear insulated shoes and test with insulated gloves.
7.8.4.2 Before testing, make sure that the tester can distinguish the structure of the SPD. The three-phase structure is 4+0 (four modules are all MOVs, the labels of the four modules are the same), and the 3+1 structure (three MOV modules and A group of GDT, MOV and GDT module labels are inconsistent), single-phase 2+0 structure (both modules are all MOV, the two modules have the same label), 1+1 structure (a group of MOV and a group of GDT, two The labels of the modules are different.)
7.8.4.3 SPD of 4+0(2+0) structure, test pens (not polarity), one of the probes touching the L or N terminal (see the port label on the SPD), one of the probes can be tested by touching the PE terminal. The MOV; 3+1 (1+1) structure of the SPD, a test probe contact L, a test probe contact N, the test is MOV; a test probe contact N, a test probe contact PE, the test is GDT.
7.8.4.4 Precautions: When the front of the SPD N-PE module is not connected in series with the backup protection circuit breaker or fuse, the N-PE module of the SPD should be disconnected from the SPD on the SPD, or the N-PE module of the SPD should be disconnected. Pull it down and test it.
7.8.4.5 When testing MOV, please input the upper and lower limits of the corresponding starting voltage in the test interface according to the Uc on the SPD tag. When not knowing, you can query the table on the tester panel. The starting voltage of the commonly used SPD is listed above. range. When the test discharge tube (Uc is usually 255V), the DC breakdown voltage is not less than 480V, usually the manufacturer will use 600V discharge tube, ± 20% - 30% of the deviation.
7.8.4.6 During the test, do not touch the test leads. The test leads have high voltage!
7.8.4.7 After the test is completed, close the disconnected backup protection device to ensure that the SPD is protected.
7.8.4.8 Criterion The MOV start-up voltage should be within the normal range and the leakage current should be less than 20uA.
7.8.4.9 The tester can automatically determine the MOV or GDT of the module in the SPD and can automatically determine the pass status.
7.8.4.10 The default preset voltage range of the tester at the factory is 200-1200V. When the test requirements cannot be met, the preset voltage can be reset in the instrument's system setting function.
7.8.4.11 The tester should be used frequently. The built-in lithium battery is often charged and discharged. If it is not used for a long period of time, it should be charged every other month to ensure the service life of the battery.
7.8.4.12 After the test is completed, please turn off immediately to save power.
7.8.5 Insulation Resistance Test
7.8.5.1 Insulation resistance test of the SPD Only measurements are made between all SPD terminals and the SPD housing. After the backup protection device is disconnected and it is confirmed that the power supply has been disconnected, the positive and negative polarity of the tester with insulation resistance of not less than 500V shall be measured once and read after the reading is stable. The criterion for passing the test is not less than 50MΩ.
9. Test operation requirements
9.1 The detection of soil resistivity and grounding resistance should be carried out on non-rainy days and when the soil is not frozen. On-site environmental conditions should ensure normal testing.
9.2 The safety protection measures for the safety personnel and equipment shall be guaranteed. The testing shall be stopped during thunderstorms, and the height-risk operation shall comply with the climbing safety rules. Testing instruments, tools, etc. cannot be placed at high places to prevent falling and wounding.
9.3 Test instruments should be used within the validation period.
9.4 Each test needs to be performed by two or more people. The test data for each test point must be filled in to the original record form after the test data is correct.
9.5 When testing on site, the rules and regulations and safe operating procedures of the inspected unit shall be strictly observed.
9.6 When detecting lightning protection devices in power distribution rooms and substations, wear insulated shoes, insulated gloves, and use insulating mats.
9.7 When inflammable, explosive, and other dangerous places are detected, it is forbidden to bring fire and mobile phones and smoking is prohibited. Wear antistatic clothing and use an explosion-proof walkie-talkie.
10. Detection of operational civilization
10.1 If the testing process may interfere with others, it should be stated in advance, and the inspection unit and the person with the disability agree to operate.
10.2 If the testing process may cause fragile items or high-value items to be damaged, precautions must be taken in advance to exercise caution.
10.3 The correct use of the tool must not be brute-forced or cause damage to the article.
10.4 Stay in the room and keep quiet. Without permission, you must not go anywhere to take pictures or record permission. Moving situation
10.5 The rust removal at the test point shall be selected on the non-obvious part of the measured object.
10.6 Pay attention to keep the site clean and do not cause any damage or damage to the surrounding environment. After the test is completed, the site shall be cleared in time and no items may be left on the site.
10.7 When parking the vehicle, attention should be paid to civilized parking. Parking in accordance with traffic regulations must not be stopped at sidewalks, blind roads, roads, entrances, exits, ramps, landscapes, lawns, garbage cans, etc. When entering the parking lot inside the unit under inspection, you must follow the instructions and park in the guest parking space or other designated location in the direction of unified parking. Do not occupy fixed parking spaces or adjacent parking spaces. Before the person gets off the vehicle, he should observe the surroundings and prevent the collision with pedestrians and vehicles when the door is opened.
11. General requirements for inspection operations
11.1 Personnel and Equipment
11.1.1 The staff are full of energy, concentrate, act positively, make orders prohibited, do not discuss non-work related topics, do not carry out work-independent activities, and maintain the image of the company. Smoking is prohibited during operation.
11.1.2 Rationally allocate operating personnel, equipment, and tools to reasonably determine the work flow, and there should be no or minimal labor shortage (except for the work caused by the inspected unit).
11.1.3 When communicating using wireless communication tools, both parties must respond in a timely manner, and the dialogue shall not involve anything unrelated to the detection of items or detection of security.
11.1.4 The instrument should be kept in the off state before use and after use. It should not be placed in places or places such as high temperature, high humidity, heavy pressure, direct sunlight, corrosive gas, etc. for a long time.
11.1.5 The tools and instruments shall be cleaned immediately after being insulted.
11.2 Operational Specifications
11.2.1 The operator should strictly follow the relevant technical specifications and standards requirements to ensure that the test data is accurate, reliable, and scientific.
11.2.2 The instruments and tools used should be properly used according to the supporting manuals and the “instrument work instructions”. They cannot be used when there is a fault or alarm.
11.2.3 All test lines and instrument connection lines shall be completely unrolled and shall not be wrapped or stacked, unless the accompanying instructions expressly exclude them.
11.2.4 When selecting the location of the test line to be deployed, it should try to find the level of safety, without any obstacle to the unfolding position of the test line, to avoid the accident, the test line is hooked, cut or wrapped with the object on the external wall of the building and other accidents Occurs, causing damage to the equipment of the person or unit under inspection.
11.2.5 When choosing the location of the grounding resistance tester, the auxiliary grounding rods shall not be placed in the position with backfill soil, nor shall they be laid on the measured ground network or other ground nets with metal objects connected to the measured ground network. The depth of the auxiliary grounding bar should be sufficient. The auxiliary grounding bar and the connection line should ensure a good electrical connection. The connection line should not be wound on the grounding bar. Keep a sufficient distance between the auxiliary ground bars, the auxiliary ground bars and the ground network under test.
11.2.6 The use of special tools such as steel boring (copper boring) to remove rust on the surface of the test point shall not be replaced by tools such as alligator clips. The test points and test lines are completely de-rusted, the surface is smooth, and the area of ​​rust removal is sufficient.
11.2.7 When the test wire is used for direct contact with the test point, the test wire must be in direct contact with the test point and must not be touched by other metal objects such as steel files. The contact point should maintain sufficient pressure to ensure correct data. Tests using non-direct contact methods should be performed in accordance with the accompanying manual.
11.2.8 The soil resistivity and grounding resistance should be measured on non-rainy days and when the soil is not frozen. When there is a continuous occurrence of weather conditions such as continuous rainfall and snowfall that greatly affect the test data, the operation should be stopped.

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