This standard specifies the product classification, technical conditions, test methods, inspection rules, marking, packaging and storage of marine pressure gauges. This standard applies to marine direct indicating pressure gauges with spring tubes as measuring parts. JB/T 5527-1991 Marine Pressure Gauge JB/T5527-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5527--91
Marine Pressure Gauge
Published on July 16, 1991www.bzxz.net
Ministry of Machinery and Electronics Industry
Implementation on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Marine Pressure Gauge
1 Subject Content and Scope of Application
JB/T5527-91
This standard specifies the product classification, technical conditions, test methods, inspection rules, as well as marking, packaging and storage of marine pressure gauges. This standard applies to marine direct indicating pressure measuring instruments (hereinafter referred to as instruments) with spring tubes as measuring elements. 2 Reference standards
GB1226
GB4208
General pressure gauge
Classification of enclosure protection level
GB2423.17 Basic environmental test regulations for electric and electronic products Test Ka: Salt spray test method GB2423.10 Basic environmental test regulations for electric and electronic products Test Fc: Vibration (sinusoidal) test method 3 Product classification
The product classification of instruments shall comply with the provisions of Chapter 1 of GB1226. Note: If there are special requirements for the instrument, the user can negotiate with the manufacturer to solve it. 4 Technical requirements
4.1 Normal working conditions
4.1.1 The normal working environment temperature of the instrument is 40~+70℃; 4.1.2 The pressure part of the instrument is generally used to 3/4 of the upper limit of the pressure measurement range. 4.2 Reference working conditions
Under the following conditions, the basic error of the instrument's indication, back-and-forth error, pointer deflection stability and tapping displacement shall comply with the provisions of the relevant clauses. 4.2.1 The instrument is in the normal working position;
4.2.2 The load changes evenly;
4.2.3 The ambient temperature is 20±5℃. 4.3 Basic requirements
The basic error, back-and-forth error, pointer deflection stability, tapping displacement, temperature influence, overload, alternating load, indicating device, anti-transportation environment performance and appearance of the instrument shall comply with the provisions of Articles 2.3 to 2.12 of GB1226. 4.4 Swing
The instrument should be able to work normally when it swings 22°30° away from the installation position. 4.5 Salt spray
The instrument should be resistant to salt spray and should show no obvious corrosion after being subjected to the 48h test specified in GB2423.17. 4.6 Shell protection
The instrument should be splash-proof and its protection level should comply with the IPX4 level specified in GB4208. 4.7 Vibration resistance in the working environment
The instrument should be able to withstand the vibration conditions specified in Table 1. After the test, the results should comply with the provisions of Articles 2.3 to 2.6 of GB1226. Approved by the Ministry of Machinery and Electronics Industry on July 16, 1991 and implemented on July 1, 1992
Frequency range Hz
Permanent luminescent agent
JB/T 5527---91
Displacement amplitude mm
Acceleration amplitude m/s2
The pointer and dial of the instrument shall be coated with permanent luminescent agent to ensure that they are clearly visible in a dark room within the distance specified in Table 2. Table 2
Nominal diameter of case mm
5 Test method
5.1 Basic requirements Test
Distance m
The basic error, back and forth error, pointer deflection stability, tapping displacement, temperature influence, overload, alternating load, indicating device, resistance to transportation environment performance and appearance tests of the instrument shall be carried out in accordance with the methods of Articles 3.1 to 3.10 and 3.12 of GB1226. 5.2 Swing test
Under the reference working temperature condition, install the instrument on a swing device that can meet the requirements of front and back, left and right vertical directions, with an amplitude of ±22°30° and a period of 10S, and make the instrument bear a fixed load between 50% and 75% of the range, and test for 10 minutes in each vertical direction. Observe the change of the instrument's indication, and the result should comply with the provisions of Article 2.3 of GB1226. 5.3 Salt spray test
The instrument should be tested according to the test specified in GB2423.17 standard, and after the test, it should comply with the provisions of Article 4.5 of this standard. 5.4 Shell protection test
The instrument should be tested according to the corresponding test method specified in GB4208 standard. After the test, wipe the instrument dry and check that the instrument panel should be clear and not affect the reading.
5.5 Vibration resistance test in working environment
Vibration test conditions
The characteristics of the vibration test bench shall comply with the provisions of GB2423.10. The instrument shall be fastened on the vibration test bench according to the use position, and the instrument shall bear a load of 50% of the range; the test shall be carried out in sequence on three mutually perpendicular axes. 5.5.2 Initial vibration response inspection
JB/T5527--91
According to the vibration parameters specified in Article 4.7 of this standard, the instrument shall be subjected to a frequency sweep test. The frequency sweep mode shall be logarithmic or linear, with a logarithmic sweep speed of 10ctave/min and a linear sweep speed of 15Hz/min. Observe whether there is resonance. 5.5.3 Durability test
The durability test of the instrument adopts a fixed frequency test method. The test is carried out at the dangerous frequency found in the initial vibration inspection. If no obvious dangerous frequency is found in the initial vibration response inspection, a 2h durability vibration test should be carried out at a frequency of 30Hz, and the acceleration amplitude of the test should be ±7m/s.
5.5.4 Inspection after vibration
After vibration, check whether the instrument has mechanical damage, and inspect it according to Articles 3.1 to 3.5 of GB1226. 5.6 Permanent luminous agent inspection
Put the instrument in a dark room for 30min, and observe it visually. It should meet the requirements of Article 4.8 of this standard. 6 Inspection rules
6.1 Factory inspection
The instrument shall be inspected for factory inspection according to the items specified in Article 4.1 of GB1226 one by one, and can only be shipped after passing the inspection. 6.2 Type test
In the following cases, the instrument shall be subjected to type test according to all technical requirements and test methods of this standard. Trial production of new products,
b. Periodic inspection of batch-produced instruments,
When there are major changes in design, process, materials, etc., d.
When the instrument that has been discontinued is produced again;
When the ship inspection department deems it necessary. e.
7 Marking, packaging and storage
The marking, packaging and storage of instruments shall comply with all the provisions of Chapter 5 of GB1226. Additional remarks:
This standard is under the jurisdiction and proposed by Xi'an Industrial Automation Instrument Research Institute. This standard was drafted by Xi'an Industrial Automation Instrument Research Institute. The main drafter of this standard is Song Jianjun.
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