Some standard content:
Industry Standard of the People's Republic of China
SL/T147-1995
20013260
Water level gauge
Point gauge
Published on 1995-06-03
Ministry of Water Resources of the People's Republic of China
Implementation on 1995-12-01
Subject content and scope of application
Cited standards
Product classification
Technical requirements
Test methods
Inspection rules
Marking, packaging, transportation, storage
Industry Standard of the People's Republic of China
Water level gauge
Point gauge gauge
SL/T147--1995
This standard adopts Article 9.2 "Needle-type water level gauge" of ISO4373-79 "Open channel water flow measurement and water level measurement equipment" of the International Organization for Standardization.
Subject content and scope of application
This standard specifies the terms, product classification, technical requirements, test methods, inspection rules, marking and packaging of water level gauges. This standard is applicable to water level gauges used for water level measurement with high data accuracy requirements. Cited standards
SL10-89 Terminology of hydrological instruments
GB9359-88 General technical requirements for hydrological instruments
GBJ138-90 Water level observation standard
GB5080.7-86
Equipment reliability test: Verification test plan for failure rate and mean time between failures under constant failure rate assumption
3 Terminology
The terms used in this standard are the same as those specified in SL10. The remaining terms are as follows: 3.1 Point gauge
Its basic component is a needle-shaped probe. When measuring, it is lowered until it touches the water surface, and the reading is used to determine the water level. 3.2 Hook gauge
Its basic component is a hook-shaped probe. When measuring, the hook tip is sunk into the water and then lifted until it touches the water surface, and the reading is used to determine the water level.
3.3 Tracking point gauge The probe needle touches the water surface and automatically tracks the change of water level. When it reaches a stationary state, the reading determines the water level. 3.4. Electronic point gauge An electronic device is added to the needle-shaped water level probe. When the probe needle touches the water surface, a signal is sent to determine the water level. 4 Product classification
4.1 Product type
The types of water level measuring needles are divided as follows:
Factory needle-shaped water level measuring needle
Straight needle type
Water level measuring needle
Hook needle type
Approved by the Ministry of Water Resources of the People's Republic of China on June 3, 1995Tracking type water level measuring needle
L electric measuring needle
Hook-shaped water level measuring needle
Implementation on December 1, 1995
4.2 Product structure
SL/T147-1995
The water level measuring needle is mainly composed of four parts: measuring needle, frame, fine-adjustment device, measuring ruler and other auxiliary devices (such as automatic tracking device and electronic indicating device, etc.).
4.3 Main parameters of the product
a) The measuring range is 0~20cm, 0~40cm, 0~50cm, 0~60cm, 0~80cm, 0~100cm; b) The scale division value is 1mm;
c) The resolution is 0.1mm, 1.0mm.
4.4 The product model naming rules are compiled according to the requirements of SD182. 5 Technical requirements
5.1 Needle-shaped water level probe and hook-shaped water level probe 5.1.1 Scale
Scale requirements are shown in Table 1.
Table 1 Requirements for measuring rulers
Total length of measuring ruler scale (cm)
Tolerance of total length of measuring ruler scale (mm)
Tolerance of straightness of measuring ruler (mm)
5.1.2 Probe
5.1.2.1 The length of the probe is generally 50300mm, the tip of the probe should be made into a 60° angle, and the radius of the tip is generally 0.25mm5.1.2.2 The straightness tolerance of the probe should be ≤0.3mm. 5.1.3. The total length of the vernier scale is 9mm, and the tolerance is ±0.058mm. 5.1.4 Compression spring
5.1.4.1: After heat treatment, the compression spring should be subjected to pressure test according to the technical requirements of the drawing, and no permanent deformation should occur. 5.1.4.2 The compression spring should be treated with anti-corrosion treatment, and the original elastic properties should be maintained after treatment. 5.1.5 Requirements for the whole machine
5.1.5.1 The matching of the scale surface of the vernier scale and the scale surface of the measuring ruler; the clearance is required to be no more than 0.15mm, and the edge parallelism is required to be no more than 0.15mm.
The amplitude adjustment size of the fine adjustment device is not less than 30mm, and there should be no slipping, burring or jamming during adjustment. The measuring needle and the measuring ruler are generally connected by threads and tightened with nuts. The two are required to be in a straight line. 5.1.5.3
For a retractable measuring ruler, the tension of the retractable measuring ruler should be within 15~35N, and it is best to make it adjustable in structure. The flatness of the mounting base of the water level measuring needle is C grade without tolerance. 5.1.5.5
The assembly of each component should be correct and firm, and there should be no looseness, deformation or other defects. Material requirements
The measuring ruler and measuring needle should be made of materials with high strength, small thermal expansion coefficient and corrosion resistance. Gears and racks should be made of high-strength, wear-resistant materials. Other parts should also be made of durable, corrosion-resistant materials. 5.1.6.3
5.1.7 Appearance quality requirements
The dimension lines and numbers of the ruler, vernier ruler, scale, etc. should be clear and symmetrical. 5.1.7.1
5.1.7.2 The product surface should be smooth and the coating should be firm without defects such as rust, peeling, and bruises. 5.2 Electric probe
5.2.1: The electric probe should meet the requirements of Article 5.1. 2
SL/T147-1995
5.2.2·After receiving the signal output by the probe, the electronic device of the electric probe should be able to emit sound, light signals or indicate, display numbers, etc. 5.2.3 The power supply is DC 3V, 6V, 9V, 12V. 5.3 Tracking water level probe
5.3.1: Tracking water level probe shall meet the relevant requirements of Article 5.1. Tracking speed: minimum 6cm/min, maximum 40cm/min. 5.3.2
5.3.3 Basic error: ≤3mm.
5.3.4 Power supply: AC 220V, frequency 50Hz, DC 6.V, 9V, 12V. 5.4 Environmental conditions requirements
a) Working temperature: 10～+50℃;
b) Storage temperature: -40～+60℃;
c) Working humidity: 95%RH at 40℃;
d) Storage humidity: 90%RH at 40℃.
Basic environmental test conditions and methods for products》5.5 When the product is packaged, it should be tested in accordance with the provisions of GB9359.5 "General technical requirements for hydrological instruments" Article 3.1 Class B1, and the following tests should be performed: a) Impact test: acceleration is 300m/s2, duration is 6ms. b) Free fall test: drop height is 250mm. 5.6 Reliability requirements
The water level probe is a repairable product, and its mean time between failures (MTBF) is 8000h, 16000h, and 25000h. 5.7 Use and installation requirements are in accordance with GBJ138 Sections 3.2.1~3.2.2. Test method
Test method is shown in Table 2.
Table 2 Test method
Standard clause
Test content
Inspection of total length of ruler scale
Inspection of ruler straightness
Inspection of needle tip size
Inspection of needle straightness
Inspection of total length of vernier scale scale
Compression spring elasticity test
Vernier scale and ruler scale
Surface clearance test
Parallelism test of vernier scale and ruler
Fine adjustment test
Connection between probe and ruler
Tightness test of ruler pulling
Tool microscope for the first piece of each batch Or length measuring instrument inspection Place the ruler on the flat plate and use the plug inspection method
Inspect the first piece and the middle of each batch, magnify 50 times with a magnifier Place the measuring needle on the flat plate and inspect the first piece of each batch with a plug Inspect with a tool microscope
Inspect 5% of each batch, and perform the pressure recovery test 3 to 5 times according to the weight in the technical requirements of the drawing. No permanent deformation should be produced
Inspect with a plug
Measure with a vernier caliper
Inspect 2% of each batch, rotate the micro-wheel, read the minimum and maximum values, the difference should be greater than or equal to 30mm
Visual inspection does not tilt
Use a spring scale (or suspend with a code) Pull out, the measuring ruler is placed at any position of the measuring range under a pulling force of 15 to 35N, it should be locked and not slide down, and the fine-adjustment part should not slide down either. Serial number
Standard clause
Inspection rules
7.1 Factory inspection
Test content
Base surface flatness inspection
Appearance quality inspection
Signal test
Tracking test
Basic error
Temperature test
Humidity test
Impact test
Drop test
Reliability test
SL/T147- 1995
Inspect with knife-edge ruler and plug
Visual inspection
Table 2 (continued)
Touch the tip of the measuring needle with the water surface. The electronic device should send out signals or indications, display numbers, etc. Use special test equipment to raise and lower the probe twice within the tracking range. The static observation results should meet the requirements of Article 5.3.3
Test conditions:
1. Working temperature:
-10～+50℃
2. Storage temperature: -40～+60℃
Test method:
Test in accordance with Article 5.3 of GB9359.5. After the test, all parts should function normally, and visual inspection should not cause deformation, cracking, or peeling. Test conditions:
1. Working humidity: 95%RH at 40℃
2. Storage humidity: 90%RH at 40℃
Test method:
Test according to Article 6.5 of GB9359.5. After the test, all parts should function normally, and visual inspection should not cause rust or peeling.
Test conditions:
Impact test should be carried out in the packaging state according to the B1 environmental conditions of GB9359.5. Test method:
Test according to Article 8.3 of GB9359.5. After the test, all parts should function normally, visual inspection shows no damage to the appearance, no cracks or deformation of the components, and no loose fasteners. Test conditions:
Drop height is 250mm in the packaged state, and the number of drops is three times. Test method:
Test according to Article 10.3 of GB9359.5. After the test, all parts should function normally, visual inspection shows no damage to the appearance, no cracks or deformation of the components, and the packaging box should not deform or crack. Test according to Chapter 5 of GB5080.7 "Timed (Constant) Truncation Test Scheme", and the selected scheme number is 5: 7
7.1.1. The water level probes produced in batches should be inspected one by one before delivery. 7.1.2 The factory inspection shall be carried out item by item by the quality inspection department of the manufacturer according to the requirements of No. 115 in Table 2 of this standard. 7.1.3 Each water level probe must be inspected and qualified by the inspection department of the manufacturer and accompanied by a certificate of conformity before it can leave the factory. 7.2 Type inspection
7.2.1 Type inspection should generally be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) Regular inspection should be carried out when leaving the factory normally; c) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; 4
d) When the product is resumed after a long period of suspension; SL/T 147—1995
e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a requirement for type inspection. 7.2.2 Type inspection shall be carried out by the quality inspection department of the manufacturer in accordance with the technical requirements of this standard. 7.2.3 Samples for type inspection shall be randomly selected from products that have passed the factory inspection, with the number of samples not less than 3. 7.2.4 Judgment rules
In the type inspection, if two units fail, the batch is judged to be unqualified; if one unit fails, double sampling should be carried out for re-inspection of the unqualified items. If there are still unqualified items, the batch is judged to be unqualified. The reasons for the batch of unqualified products should be analyzed and measures should be taken to repair them and re-conduct the second type test. If qualified, the batch is confirmed to be qualified; if still unqualified, the batch is considered unqualified and the type inspection should be stopped: 7.2.5 Products that have passed the type inspection need to replace wearing parts and can only leave the factory after passing the factory inspection. 8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
a) Manufacturer name or factory logo;
.b) Manufacturing date or number.
8.1.2. Marking of outer packaging box
a) Product model and name;
b) Box size and quality;
c) Product quantity;
d) Destination station (port) and consignee;
e) Departure station (port) and consignor;
f) Operational signs during transportation, such as "Do not invert", "Do not get wet", "Precision instrument, handle with care" and other words and patterns. 8.2 Packaging
8.2.1 Products packed in instrument boxes or other forms should be protected from moisture. 8.2.2 The packaging box should be filled with dry, soft materials or have fixing devices to achieve the purpose of shock absorption and collision prevention. 8.2.3.. The packaging box should be firm and tied and reinforced with steel straps or polypropylene plastic straps. 8.3 Transportation
Products can be transported by any means of transportation under packaging conditions. 8.4 Storage
8.4.1 The storage environment of the product shall meet the requirements of 5.10. No corrosive substances or organic solutions shall be allowed in the room. 8.4.2 Anti-rust oil shall be applied to unpainted parts during product storage. Additional remarks:
This standard is proposed by the Ministry of Water Resources of the People's Republic of China. This standard is drafted by Nanjing Water Resources and Hydrology Automation Research Institute. The main drafters of this standard are Wu Huanping, Li Xiaoyun and Kang Wenshu. This standard is entrusted to Nanjing Water Resources and Hydrology Automation Research Institute for interpretation. SL/T147-1995
People's Republic of China
Industry Standard Stall
Water Level Probe
SL/T147-1995
Published and distributed by China Water Resources and Hydropower Press (No. 6 Sanlihe Road, Beijing: 100044) Printed by Xiaohongmen Printing Factory, Chaoyang District, Beijing*
880×1230 mm, 16-mo: 0.5 sheets·10,000 words First edition in January 1996 Second printing in Beijing in August 1998 Printing quantity 1001-4000 copies
Book number 1580124·27
Price 2.00 yuan3. After the test, all parts should function normally, and visual inspection should not cause deformation, cracking, or peeling. Test conditions:
1. Working humidity: 95%RH at 40℃
2. Storage humidity: 90%RH at 40℃
Test method:
Test according to Article 6.5 of GB9359.5. After the test, all parts should function normally, and visual inspection should not cause rust or peeling.
Test conditions:
Impact test should be carried out in the packaging state according to the B1 environmental conditions of GB9359.5. Test method:
Test according to Article 8.3 of GB9359.5. After the test, all parts should function normally, visual inspection shows no damage to the appearance, no cracks or deformation of the components, and no loose fasteners. Test conditions:
Drop height is 250mm in the packaged state, and the number of drops is three times. Test method:
Test according to Article 10.3 of GB9359.5. After the test, all parts should function normally, visual inspection shows no damage to the appearance, no cracks or deformation of the components, and the packaging box should not deform or crack. Test according to Chapter 5 of GB5080.7 "Timed (Constant) Truncation Test Scheme", and the selected scheme number is 5: 7
7.1.1. The water level probes produced in batches should be inspected one by one before delivery. 7.1.2 The factory inspection shall be carried out item by item by the quality inspection department of the manufacturer according to the requirements of No. 115 in Table 2 of this standard. 7.1.3 Each water level probe must be inspected and qualified by the inspection department of the manufacturer and accompanied by a certificate of conformity before it can leave the factory. 7.2 Type inspection
7.2.1 Type inspection should generally be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) Regular inspection should be carried out when leaving the factory normally; c) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; 4
d) When the product is resumed after a long period of suspension; SL/T 147—1995
e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a requirement for type inspection. 7.2.2 Type inspection shall be carried out by the quality inspection department of the manufacturer in accordance with the technical requirements of this standard. 7.2.3 Samples for type inspection shall be randomly selected from products that have passed the factory inspection, with the number of samples not less than 3. 7.2.4 Judgment rules
In the type inspection, if two units fail, the batch is judged to be unqualified; if one unit fails, double sampling should be carried out for re-inspection of the unqualified items. If there are still unqualified items, the batch is judged to be unqualified. The reasons for the batch of unqualified products should be analyzed and measures should be taken to repair them and re-conduct the second type test. If qualified, the batch is confirmed to be qualified; if still unqualified, the batch is considered unqualified and the type inspection should be stopped: 7.2.5 Products that have passed the type inspection need to replace wearing parts and can only leave the factory after passing the factory inspection. 8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
a) Manufacturer name or factory logo;
.b) Manufacturing date or number.
8.1.2. Marking of outer packaging box
a) Product model and name;
b) Box size and quality;
c) Product quantity;
d) Destination station (port) and consignee;
e) Departure station (port) and consignor;
f) Operational signs during transportation, such as "Do not invert", "Do not get wet", "Precision instrument, handle with care" and other words and patterns. 8.2 Packaging
8.2.1 Products packed in instrument boxes or other forms should be protected from moisture. 8.2.2 The packaging box should be filled with dry, soft materials or have fixing devices to achieve the purpose of shock absorption and collision prevention. 8.2.3.. The packaging box should be firm and tied and reinforced with steel straps or polypropylene plastic straps. 8.3 Transportation
Products can be transported by any means of transportation under packaging conditions. 8.4 Storage
8.4.1 The storage environment of the product shall meet the requirements of 5.10. No corrosive substances or organic solutions shall be allowed in the room. 8.4.2 Anti-rust oil shall be applied to unpainted parts during product storage. Additional remarks:
This standard is proposed by the Ministry of Water Resources of the People's Republic of China. This standard is drafted by Nanjing Water Resources and Hydrology Automation Research Institute. The main drafters of this standard are Wu Huanping, Li Xiaoyun and Kang Wenshu. This standard is entrusted to Nanjing Water Resources and Hydrology Automation Research Institute for interpretation. SL/T147-1995
People's Republic of China
Industry Standard Stall
Water Level Probe
SL/T147-1995bzxz.net
Published and distributed by China Water Resources and Hydropower Press (No. 6 Sanlihe Road, Beijing: 100044) Printed by Xiaohongmen Printing Factory, Chaoyang District, Beijing*
880×1230 mm, 16-mo: 0.5 sheets·10,000 words First edition in January 1996 Second printing in Beijing in August 1998 Printing quantity 1001-4000 copies
Book number 1580124·27
Price 2.00 yuan3. After the test, all parts should function normally, and visual inspection should not cause deformation, cracking, or peeling. Test conditions:
1. Working humidity: 95%RH at 40℃
2. Storage humidity: 90%RH at 40℃
Test method:
Test according to Article 6.5 of GB9359.5. After the test, all parts should function normally, and visual inspection should not cause rust or peeling.
Test conditions:
Impact test should be carried out in the packaging state according to the B1 environmental conditions of GB9359.5. Test method:
Test according to Article 8.3 of GB9359.5. After the test, all parts should function normally, visual inspection shows no damage to the appearance, no cracks or deformation of the components, and no loose fasteners. Test conditions:
Drop height is 250mm in the packaged state, and the number of drops is three times. Test method:
Test according to Article 10.3 of GB9359.5. After the test, all parts should function normally, visual inspection shows no damage to the appearance, no cracks or deformation of the components, and the packaging box should not deform or crack. Test according to Chapter 5 of GB5080.7 "Timed (Constant) Truncation Test Scheme", and the selected scheme number is 5: 7
7.1.1. The water level probes produced in batches should be inspected one by one before delivery. 7.1.2 The factory inspection shall be carried out item by item by the quality inspection department of the manufacturer according to the requirements of No. 115 in Table 2 of this standard. 7.1.3 Each water level probe must be inspected and qualified by the inspection department of the manufacturer and accompanied by a certificate of conformity before it can leave the factory. 7.2 Type inspection
7.2.1 Type inspection should generally be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) Regular inspection should be carried out when leaving the factory normally; c) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; 4
d) When the product is resumed after a long period of suspension; SL/T 147—1995
e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a requirement for type inspection. 7.2.2 Type inspection shall be carried out by the quality inspection department of the manufacturer in accordance with the technical requirements of this standard. 7.2.3 Samples for type inspection shall be randomly selected from products that have passed the factory inspection, with the number of samples not less than 3. 7.2.4 Judgment rules
In the type inspection, if two units fail, the batch is judged to be unqualified; if one unit fails, double sampling should be carried out for re-inspection of the unqualified items. If there are still unqualified items, the batch is judged to be unqualified. The reasons for the batch of unqualified products should be analyzed and measures should be taken to repair them and re-conduct the second type test. If qualified, the batch is confirmed to be qualified; if still unqualified, the batch is considered unqualified and the type inspection should be stopped: 7.2.5 Products that have passed the type inspection need to replace wearing parts and can only leave the factory after passing the factory inspection. 8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
a) Manufacturer name or factory logo;
.b) Manufacturing date or number.
8.1.2. Marking of outer packaging box
a) Product model and name;
b) Box size and quality;
c) Product quantity;
d) Destination station (port) and consignee;
e) Departure station (port) and consignor;
f) Operational signs during transportation, such as "Do not invert", "Do not get wet", "Precision instrument, handle with care" and other words and patterns. 8.2 Packaging
8.2.1 Products packed in instrument boxes or other forms should be protected from moisture. 8.2.2 The packaging box should be filled with dry, soft materials or have fixing devices to achieve the purpose of shock absorption and collision prevention. 8.2.3.. The packaging box should be firm and tied and reinforced with steel straps or polypropylene plastic straps. 8.3 Transportation
Products can be transported by any means of transportation under packaging conditions. 8.4 Storage
8.4.1 The storage environment of the product shall meet the requirements of 5.10. No corrosive substances or organic solutions shall be allowed in the room. 8.4.2 Anti-rust oil shall be applied to unpainted parts during product storage. Additional remarks:
This standard is proposed by the Ministry of Water Resources of the People's Republic of China. This standard is drafted by Nanjing Water Resources and Hydrology Automation Research Institute. The main drafters of this standard are Wu Huanping, Li Xiaoyun and Kang Wenshu. This standard is entrusted to Nanjing Water Resources and Hydrology Automation Research Institute for interpretation. SL/T147-1995
People's Republic of China
Industry Standard Stall
Water Level Probe
SL/T147-1995
Published and distributed by China Water Resources and Hydropower Press (No. 6 Sanlihe Road, Beijing: 100044) Printed by Xiaohongmen Printing Factory, Chaoyang District, Beijing*
880×1230 mm, 16-mo: 0.5 sheets·10,000 words First edition in January 1996 Second printing in Beijing in August 1998 Printing quantity 1001-4000 copies
Book number 1580124·27
Price 2.00 yuanThe packaging box should be firm and reinforced with steel straps or polypropylene plastic straps. 8.3 Transportation
The product can be transported by any means of transportation under packaging conditions. 8.4 Storage
8.4.1 The storage environment conditions of the product should meet the requirements of Article 5.10, and no corrosive substances and organic solvents should be allowed indoors. 8.4.2 Anti-rust oil should be applied to unpainted parts when the product is stored. Additional notes:
This standard was proposed by the Ministry of Water Resources of the People's Republic of China. This standard was drafted by the Nanjing Institute of Water Resources and Hydrology Automation. The main drafters of this standard are: Wu Huanping, Li Xiaoyun, Kang Wenshu. This standard is entrusted to the Nanjing Institute of Water Resources and Hydrology Automation for interpretation. SL/T147-1995
People's Republic of China
Industry Standard Stall
Water Level Probe
SL/T147-1995
Published and distributed by China Water Resources and Hydropower Press (No. 6 Sanlihe Road, Beijing: 100044) Printed by Xiaohongmen Printing Factory, Chaoyang District, Beijing*
880×1230 mm, 16-mo: 0.5 sheets·10,000 words First edition in January 1996 Second printing in Beijing in August 1998 Printing quantity 1001-4000 copies
Book number 1580124·27
Price 2.00 yuanThe packaging box should be firm and reinforced with steel straps or polypropylene plastic straps. 8.3 Transportation
The product can be transported by any means of transportation under packaging conditions. 8.4 Storage
8.4.1 The storage environment conditions of the product should meet the requirements of Article 5.10, and no corrosive substances and organic solvents should be allowed indoors. 8.4.2 Anti-rust oil should be applied to unpainted parts when the product is stored. Additional notes:
This standard was proposed by the Ministry of Water Resources of the People's Republic of China. This standard was drafted by the Nanjing Institute of Water Resources and Hydrology Automation. The main drafters of this standard are: Wu Huanping, Li Xiaoyun, Kang Wenshu. This standard is entrusted to the Nanjing Institute of Water Resources and Hydrology Automation for interpretation. SL/T147-1995
People's Republic of China
Industry Standard Stall
Water Level Probe
SL/T147-1995
Published and distributed by China Water Resources and Hydropower Press (No. 6 Sanlihe Road, Beijing: 100044) Printed by Xiaohongmen Printing Factory, Chaoyang District, Beijing*
880×1230 mm, 16-mo: 0.5 sheets·10,000 words First edition in January 1996 Second printing in Beijing in August 1998 Printing quantity 1001-4000 copies
Book number 1580124·27
Price 2.00 yuan
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