GB/T 15309-1994 Technical requirements and test methods for temperature and humidity instruments in cargo holds of ships
Some standard content:
UDC629.12.011.51：536.5：533.275N11
National Standard of the People's Republic of China
GB/T15309-94
Technical reguirements and testing methods for temperatureand humidity instruments for cargo hold of vesselPublished on December 22, 1994
Implemented on October 1, 1995
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Technical requirements and testing methods for temperaturdand humidity instruments for cargo hold of vesselMain contents and scope of application
This standard specifies the technical requirements and test methods for temperature and humidity instruments for cargo hold of vessel. GB/T15309—94
This standard applies to cargo hold temperature and humidity measuring instruments used in ocean-going ships and coastal ships. 2 Reference standards
Basic environmental test procedures for electric and electronic products Test A: Low temperature test method Test B: High temperature test method
Basic environmental test procedures for electric and electronic products Basic environmental test procedures for electric and electronic products Test Ca: Steady damp heat test method
Basic environmental test procedures for electric and electronic products Test Fc: Vibration (sinusoidal) test method GB2423.10
GB2423.17
JT4522.11
JT4522.12
JT4522.14
3 Technical requirements
3.1 General requirements
Basic environmental test procedures for electrical and electronic products Test Ka: Salt spray test method
Environmental test conditions and methods for marine electronic equipment Tilt, swing
Environmental test conditions and methods for marine electronic equipment Environmental test conditions and methods for marine electronic equipment 3.1.1 Sensors of the same model should be interchangeable. Mildew
Electromagnetic compatibility
3.1.2 When the length of the sensor's signal cable is less than 200m, it should not affect the accuracy specified by the instrument. The signal cable should be shielded or twisted in pairs, or shielded and twisted in pairs at the same time. The sensor should also have a shielding device. 3.1.3 When the sensor's signal cable is laid in a large cabin, it should be worn in a steel pipe to prevent mechanical damage. 3.1.4 The overall size of the sensor should not be greater than 1300cm. 3.1.5 The circuit design should be convenient for testing, calibration, maintenance and repair. When repairing, it is advisable to replace components. The circuit connection shall not be directly connected to any point of the ship's main power supply system. The casing cannot be used as any component of the circuit. 3.1.6 The instrument should be able to work normally for a long time under 24h continuous working conditions. 3.1.7 When using plugs and sockets for connection, the contact head should not carry any mechanical load except the pressure required to ensure good contact. The plug-in base or printed circuit board should be equipped with a clamping device to prevent it from coming out due to impact or vibration. 3.2 Main technical performance requirements
3.2.1 The working voltage and current of the temperature and humidity sensor shall meet the following requirements: a. Under DC working conditions, the working voltage U is less than 6V; the working current I is less than 100mA; b. Under AC working conditions, the working voltage U is less than 6V, the working current I is less than 20mA: the inductance L is less than 0.1H. Approved by the State Bureau of Technical Supervision on December 22, 1994, and implemented on October 1, 1995
GB/T15309-94
3.2-2 The instrument should be able to work normally under the two power supply modes of 110V/220V, and meet the following requirements: When the power supply is in the steady-state change specified in Table 1, the instrument should be able to work normally, a.
Voltage change, %Um
Rated rate change, %H
When the power supply is in the transient change specified in Table 2, the instrument should be able to work normally. Table 2
Voltage change, %UH
3.2.3 Temperature measurement accuracy: ±1℃.
3.2.4 Temperature measurement range: 30~+80℃. 3.2.5 Humidity measurement accuracy: soil 3%.
Frequency change, %Fh
3.2.6 Humidity measurement range (relative humidity): 30%～100%. 3.3 Environmental conditions
3.3.1 Temperature
3.3.1.1 The instrument (except the sensing part) should be able to work normally in the ambient temperature range of -10～+70℃. 3.3.1.2 The humidity sensor should be able to work normally in the ambient temperature range of -10～+80℃. 3.3.2 Humidity
The humidity meter should be able to work normally under the conditions of temperature of 40±2℃ and relative humidity of 90～95%. 3.3.3 Vibration resistance
The instrument should have vibration resistance and meet the following requirements after vibration test: recovery time, s
a. Parts should not be loose, broken or deformed; when the frequency is 2.0~13.3Hz, the displacement amplitude is ±1.0mm; when the frequency is 13.2~80.0Hz, the acceleration amplitude should be b.
±0.7X9.8m/s*.
3.3.4 Tilt and roll
The instrument should be able to work normally under each of the following ship tilt and roll conditions. Tilt 22.5 in all directions from the installation position; a.
Roll 22.5, the full cycle is 10s
The linear vertical acceleration is 9.8m/s2.
3.3.5 Salt spray
The instrument should be able to work normally under salt spray (6C3) conditions. 3.3.6 Mold
The instrument should be able to work normally under mold growth (6B2) conditions. 3.3.7 Electromagnetic compatibility
The instrument shall meet various electromagnetic compatibility requirements within the frequency band of 10 to 30 MHz. 4 Test methods
4.1 General requirements
GB/T15309-94
: Under normal atmospheric conditions, according to relevant standards, use general length, time measuring instruments and electrical measuring instruments to measure the electrical and mechanical properties of temperature and humidity instruments and conduct appearance inspections. The results shall meet the requirements of Article 3.1. b. The instruments used to measure technical performance shall have certificates approved by the metrology department; the measurement accuracy of the measuring instruments used shall be one order of magnitude higher than the accuracy measured by the measured instrument.
4.2 Test of the working voltage and working current of the temperature and humidity sensors. Use simulation methods or other methods to obtain the maximum value of the temperature + 80°C and the minimum value - 30°C, so that the instrument is in working condition, and use digital ammeters and voltmeters to measure the working current and working voltage of the sensor respectively. The readings shall meet the requirements of Article 3.2.1. 4.3 Power supply change test
In the following cases, the power supply voltage shall be tested for technical performance according to the test method of Article 4.2 and the contents listed in Articles 3.2.1 to 3.2.6. a. The AC voltage changes steadily, and its change range is ±10% of the rated voltage (110V or 220V), and the frequency change is ±5% of the rated value (50Hz);
b. The AC voltage changes transiently, and its change range is ±10% of the rated voltage (110V or 220V), and the frequency change is ±5% of the rated value (50Hz), and the recovery time is 3s. 4.4 Temperature measurement accuracy test
4.4.1 Test instrument
Use a second-class standard mercury thermometer as a standard instrument; a.
Use a 25% by weight calcium chloride solution, distilled water, and ethanol three liquid detection tanks as test equipment. 4.4.2 Test requirements and steps
The temperature change rate in the test tank is not more than 0.2℃ per minute; the temperature field in the test tank is uniform and stable, the horizontal temperature difference in the working area is not more than 0.1℃, and the vertical temperature difference is not more than 0.15℃; Note: The working area refers to the central space in the test tank, excluding the range of 3cm from the tank wall and the top of the tank, the same below. The detection points of the digital display value of the ship's cargo hold thermometer are ~30.0C, 0℃ and 80.0℃. When the test tank is at the above three temperature points, the error between the temperature display of the instrument and the reading of the second-class standard mercury thermometer shall comply with the provisions of Article 3.2.3. 4.5 Test of temperature range
Set the temperature of the temperature detection tank to -30℃ (based on the reading of the second-class standard mercury thermometer), and the temperature display of the instrument should be the corresponding value. Let the temperature of the temperature detection tank rise gradually and slowly, and the temperature display value of the instrument should increase accordingly, and its maximum display value should be able to reach +80℃. At the same time, select some temperature values arbitrarily within the range of -30~+80℃, and check their accuracy using the method in Article 4.4. The results should comply with the provisions of Article 3.2.4.
4.6 Test of humidity measurement accuracy
4.6.1 Test instrument
Use two sets of series of standard humidity fields of saturated salt solution and glycerol solution (the preparation methods are all in Appendix A) as standard instruments. Use three sets of constant temperature sealed standard humidity tanks of saturated magnesium chloride solution, saturated ammonium nitrate solution, and distilled water, and constant temperature sealed tanks of glycerol solution with corresponding standard humidity as test equipment.
4.6.2 Test requirements
The standard humidity test tank should be suitable for testing the ship cargo hold humidity meter and meet the following performance requirements. The humidity field in the test tank is uniform and stable, the horizontal relative humidity difference in the working area is not greater than 0.2%, the vertical relative humidity difference is not greater than a.
b, and the relative humidity change rate in the test tank is not greater than 0.5% per minute. 4.6.3 Test method
4.6.3.1 Place the test sensor in a container containing saturated salt solution, close to the liquid surface, but not touching the liquid surface. Place a temperature measuring element near the sensor in the container, and its measurement accuracy should not be less than 0.2℃. After sealing the container, place it in a constant temperature bath, and observe the temperature in the container and the output value of the sensor under test every 10~20 minutes. 4.6.3.2 When the output value of the sensor under test remains unchanged for three consecutive times or has no obvious directional changes, start recording data. 3
GB/T15309—94
4.6.3.3 Under the same temperature condition, select three saturated salt solutions with different humidity, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use the propylene glycol solution of the corresponding standard humidity for constant temperature and sealing verification. The error of the detected relative humidity should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature and sealed humidity detection tank, and control the temperature at 60℃ and 10℃ respectively. Use a hygrometer to read the relative humidity, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the relative humidity range of 30% to 95% (see Appendix A). Use the method in Article 4.6 to check its accuracy, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental tests
4.8.1 High temperature test
The test shall be carried out in accordance with the provisions of GB2423.1 and GB2423.2. The results shall meet the requirements of Article 3.3.1. 4.8.2 Steady heat and humidity test
The test shall be carried out in accordance with the provisions of GB2423.3. The results shall meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10. The results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11. The results shall meet the requirements of Article 3.3.4. 4.8.5 Salt spray test
The test shall be carried out in accordance with the provisions of GB2423.17. The results shall meet the requirements of Article 3.3.5. 4.8.6 Fungus test
Test according to the provisions of JT4522.13, and the results shall meet the requirements of Article 3.3.6. 4.8.7 Electromagnetic interference
Test according to JT4522.14 (D group equipment), and the results shall meet the requirements of Article 3.3.7. GB/T15309-94
Test method for standard temperature field of saturated salt solution and glycerol solution (reference)
'A1 Preparation requirements and test methods for standard humidity field of saturated salt solution A1.7 Select several groups of clean constant temperature closed tanks, and inject saturated salt solution of required concentration to half full in advance. The salt used to prepare the solution must meet the requirements of chemically pure or analytically pure reagents, and no less than 1/4 of the salt crystals must be present in the solution. The conductivity of steamed stuffing water for preparing saturated salt solution should be less than 10s/m. When the water vapor in the space of the constant temperature closed saturated salt solution detection tank reaches evaporation-condensation equilibrium, there is a constant relative humidity value. The relative humidity values of several saturated salt solutions at 5-60℃ and below 0℃ are shown in Table A1 and Table A2. Table A1
Temperature, °C
Saturated salt solution
Potassium sulfate K,SO
Potassium nitrate KNOs
Potassium fluoride KCI
Ammonium sulfate (NH)SO
Sodium fluoride NaCI
Ammonium nitrate NH.NO
Sodium dichromate
Na,Cr.O,2H,O
Magnesium nitrate
Mg(NO,)2 - 6H,0
Magnesium fluoride MgCl,·6H.o
Potassium acetate CH.COOK
Lithium chloride LiCI·rHO
Temperature, °C
Saturated salt solution
Ammonium fluoride NH.CI
Copper fluoride CuCl.
Sodium bromide NaBr
Calcium nitrate Ca(NO,)
Sodium iodide Nal
Magnesium fluoride MgCl·6H2O
Potassium acetate CH,COOK
Lithium chloride LiCI·cH.O
Relative humidity, %
Relative humidity, %
A1.2 The standard humidity field of saturated salt solution must be verified by the solution vapor pressure measuring device. The solution vapor pressure measuring device is shown in Figure A1. 60||tt ||GB/T15309--94
Figure A1 Device for measuring liquid vapor pressure
1-connected to vacuum pump; 2-drying bottle; 3-three-way piston: 4-gas storage bottle: 5, 6-two-way piston: 7-isobaric gauge with condenser; 8-mercury thermometer; 9-water bath; 10--stirrer; 11-electric furnace, 12-mercury pressure gaugeA1.3Under the condition that the measuring performance of the tested element is not affected, a smaller test tank should be used as much as possible to reduce the time required for the temperature and humidity to reach equilibrium.
A1.4During the test, salt frost formed by saturated salt solution should be prevented from damaging the ship cargo hold humidity meter. The ship cargo hold humidity meter made of copper or copper alloy materials should not be tested with saturated ammonium salt solution. A2 Preparation requirements and test methods of glycerol C, Hs (OH) solution standard humidity field Select several groups of clean constant temperature closed tanks and inject the required concentration of glycerol solution to half full in advance. When glycerol is used to prepare the solution, it must meet the requirements of analytical pure reagents; when distilled water is used to prepare the glycerol solution, the conductivity should be less than 10s/m. In the constant temperature and closed detection tank space of the glycerol solution of a certain concentration, when the water vapor reaches the evaporation-condensation equilibrium, it has a constant relative humidity value. The relative humidity values of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. The relative humidity of glycerol solutions with various weight percentage concentrations at 25°C has a certain correlation with the refractive index of the solution. The standard humidity field of the glycerol solution must be verified by a refractometer. The relative humidity and refractive index of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. Table A3
Relative humidity
Glycerol concentration
Note: ①The detection range of the refractometer is 1.33~1.47. The accuracy is ±0.001.6
Density (25℃)
Refractive index n(25℃)
GB/T15309-94
②During the test, the glycerol solution should be prevented from overflowing and damaging the ship cargo hold humidity meter. Additional remarks:
This standard was proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Metrology Research Institute of the Ministry of Transport. This standard was drafted by Shanghai Maritime University and the Standardization and Metrology Research Institute of the Ministry of Transport. The main drafters of this standard are Gao Jianping, Shuai Zhikang and Jin Shengli. (Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Ship Cargo Hold Temperature and Humidity Instrument
Technical Requirements and Test Methods
GB/T15309--94
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 852211 2
Printed by China Standard Press, Qinhuangdao Printing Factory, Xinhua Bookstore, Beijing Distribution Office, Xinhua Bookstores in all regions, copyright reserved, no reproduction allowed
Format: 880×12301/16 Printing sheet: 3/4 Word count: 13,000 words First edition: July 1995 First printing: July 1995 Print run: 1--1500
Book number: 155066·1-11754
Heading: 269-404 provisions.
4.6 Test of humidity measurement accuracy
4.6.1 Test instrument
Use two series of standard humidity fields of saturated salt solution and propylene glycol solution (the preparation methods are shown in Appendix A) as standard instruments. Use three sets of constant temperature sealed standard humidity tanks of saturated magnesium chloride solution, saturated ammonium nitrate solution, and distilled water, and constant temperature sealed tanks of propylene glycol solution with corresponding standard humidity as test equipment.
4.6.2 Test requirements
The standard humidity test tank should be applicable to the test of the ship cargo hold humidity meter and meet the following performance requirements. The humidity field in the test tank is uniform and stable, the horizontal relative humidity difference in the working area is not greater than 0.2%, the vertical relative humidity difference is not greater than a.
b, and the relative humidity change rate in the test tank is not greater than 0.5% per minute. 4.6.3 Test method
4.6.3.1 Place the test sensor in the container containing saturated salt solution, close to the liquid surface, but not touching the liquid surface. Place a temperature measuring element near the sensor in the container, and its measurement accuracy should not be less than 0.2℃. After sealing the container, place it in a constant temperature bath, and observe the temperature in the container and the output value of the sensor under test every 10~20 minutes. 4.6.3.2 When the output value of the sensor under test remains unchanged for three consecutive times or has no obvious directional changes, start recording data. 3
GB/T15309—94
4.6.3.3 Select three saturated salt solutions with different humidity under the same temperature conditions, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use a propylene glycol solution with the corresponding standard humidity for constant temperature sealing verification. The relative humidity error after detection should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature sealed humidity detection tank, the temperature is controlled at 60℃ and 10℃ respectively, and the relative humidity is measured with a hygrometer, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the relative humidity range of 30% to 95% (see Appendix A). Check its accuracy using the method in Article 4.6, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental test
4.8.1 High temperature test
Perform the test in accordance with the provisions of GB2423.1 and GB2423.2, and the result should meet the requirements of Article 3.3.1. 4.8.2 Constant humidity test
Perform the test in accordance with the provisions of GB2423.3, and the result should meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10, and the results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11, and the results shall meet the requirements of Article 3.3.4. 4.8.5 Salt spray test
The test shall be carried out in accordance with the provisions of GB2423.17, and the results shall meet the requirements of Article 3.3.5. 4.8.6 Fungus test
The test shall be carried out in accordance with the provisions of JT4522.13, and the results shall meet the requirements of Article 3.3.6. 4.8.7 Electromagnetic interference
The test shall be carried out in accordance with JT4522.14 (Group D equipment), and the results shall meet the requirements of Article 3.3.7. GB/T15309—94
Test method for standard temperature field of saturated salt solution and glycerol solution (reference)
'A1 Preparation requirements and test method for standard humidity field of saturated salt solution A1.7 Select several groups of clean constant temperature closed tanks and inject saturated salt solution of required concentration to half full in advance. The salt used to prepare the solution must meet the requirements of chemically pure or analytically pure reagents, and no less than 1/4 of the salt crystals must be present in the solution. The conductivity of steamed stuffing water for preparing saturated salt solution should be less than 10s/m. When the water vapor in the space of the constant temperature closed saturated salt solution detection tank reaches evaporation-condensation equilibrium, there is a constant relative humidity value. The relative humidity values of several saturated salt solutions at 5-60℃ and below 0℃ are shown in Table A1 and Table A2. Table A1
Temperature, °C
Saturated salt solution
Potassium sulfate K,SO
Potassium nitrate KNOs
Potassium fluoride KCI
Ammonium sulfate (NH)SO
Sodium fluoride NaCI
Ammonium nitrate NH.NO
Sodium dichromate
Na,Cr.O,2H,O
Magnesium nitrate
Mg(NO,)2 - 6H,0
Magnesium fluoride MgCl,·6H.o
Potassium acetate CH.COOK
Lithium chloride LiCI·rHO
Temperature, °C
Saturated salt solution
Ammonium fluoride NH.CI
Copper fluoride CuCl.
Sodium bromide NaBr
Calcium nitrate Ca(NO,)
Sodium iodide Nal
Magnesium fluoride MgCl·6H2O
Potassium acetate CH,COOK
Lithium chloride LiCI·cH.O
Relative humidity, %
Relative humidity, %
A1.2 The standard humidity field of saturated salt solution must be verified by the solution vapor pressure measuring device. The solution vapor pressure measuring device is shown in Figure A1. 60||tt ||GB/T15309--94
Figure A1 Device for measuring liquid vapor pressure
1-connected to vacuum pump; 2-drying bottle; 3-three-way piston: 4-gas storage bottle: 5, 6-two-way piston: 7-isobaric gauge with condenser; 8-mercury thermometer; 9-water bath; 10--stirrer; 11-electric furnace, 12-mercury pressure gaugeA1.3Under the condition that the measuring performance of the tested element is not affected, a smaller test tank should be used as much as possible to reduce the time required for the temperature and humidity to reach equilibrium.
A1.4During the test, salt frost formed by saturated salt solution should be prevented from damaging the ship cargo hold humidity meter. The ship cargo hold humidity meter made of copper or copper alloy materials should not be tested with saturated ammonium salt solution. A2 Preparation requirements and test methods of glycerol C, Hs (OH) solution standard humidity field Select several groups of clean constant temperature closed tanks and inject the required concentration of glycerol solution to half full in advance. When glycerol is used to prepare the solution, it must meet the requirements of analytical pure reagents; when distilled water is used to prepare the glycerol solution, the conductivity should be less than 10s/m. In the constant temperature and closed detection tank space of the glycerol solution of a certain concentration, when the water vapor reaches the evaporation-condensation equilibrium, it has a constant relative humidity value. The relative humidity values of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. The relative humidity of glycerol solutions with various weight percentage concentrations at 25°C has a certain correlation with the refractive index of the solution. The standard humidity field of the glycerol solution must be verified by a refractometer. The relative humidity and refractive index of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. Table A3
Relative humidity
Glycerol concentration
Note: ①The detection range of the refractometer is 1.33~1.47. The accuracy is ±0.001.6
Density (25℃)
Refractive index n(25℃)
GB/T15309-94
②During the test, the glycerol solution should be prevented from overflowing and damaging the ship cargo hold humidity meter. Additional remarks:
This standard was proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Metrology Research Institute of the Ministry of Transport. This standard was drafted by Shanghai Maritime University and the Standardization and Metrology Research Institute of the Ministry of Transport. The main drafters of this standard are Gao Jianping, Shuai Zhikang and Jin Shengli. (Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Ship Cargo Hold Temperature and Humidity Instrument
Technical Requirements and Test Methods
GB/T15309--94
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 852211 2
Printed by China Standard Press, Qinhuangdao Printing Factory, Xinhua Bookstore, Beijing Distribution Office, Xinhua Bookstores in all regions, copyright reserved, no reproduction allowed
Format: 880×12301/16 Printing sheet: 3/4 Word count: 13,000 words First edition: July 1995 First printing: July 1995 Print run: 1--1500
Book number: 155066·1-11754
Heading: 269-404 provisions.
4.6 Test of humidity measurement accuracy
4.6.1 Test instrument
Use two series of standard humidity fields of saturated salt solution and propylene glycol solution (the preparation methods are shown in Appendix A) as standard instruments. Use three sets of constant temperature sealed standard humidity tanks of saturated magnesium chloride solution, saturated ammonium nitrate solution, and distilled water, and constant temperature sealed tanks of propylene glycol solution with corresponding standard humidity as test equipment.
4.6.2 Test requirements
The standard humidity test tank should be applicable to the test of the ship cargo hold humidity meter and meet the following performance requirements. The humidity field in the test tank is uniform and stable, the horizontal relative humidity difference in the working area is not greater than 0.2%, the vertical relative humidity difference is not greater than a.
b, and the relative humidity change rate in the test tank is not greater than 0.5% per minute. 4.6.3 Test method
4.6.3.1 Place the test sensor in the container containing saturated salt solution, close to the liquid surface, but not touching the liquid surface. Place a temperature measuring element near the sensor in the container, and its measurement accuracy should not be less than 0.2℃. After sealing the container, place it in a constant temperature bath, and observe the temperature in the container and the output value of the sensor under test every 10~20 minutes. 4.6.3.2 When the output value of the sensor under test remains unchanged for three consecutive times or has no obvious directional changes, start recording data. 3
GB/T15309—94
4.6.3.3 Select three saturated salt solutions with different humidity under the same temperature conditions, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use a propylene glycol solution with the corresponding standard humidity for constant temperature sealing verification. The relative humidity error after detection should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature sealed humidity detection tank, the temperature is controlled at 60℃ and 10℃ respectively, and the relative humidity is measured with a hygrometer, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the relative humidity range of 30% to 95% (see Appendix A). Check its accuracy using the method in Article 4.6, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental test
4.8.1 High temperature test
Perform the test in accordance with the provisions of GB2423.1 and GB2423.2, and the result should meet the requirements of Article 3.3.1. 4.8.2 Constant humidity test
Perform the test in accordance with the provisions of GB2423.3, and the result should meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10, and the results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11, and the results shall meet the requirements of Article 3.3.4. 4.8.5 Salt spray test
The test shall be carried out in accordance with the provisions of GB2423.17, and the results shall meet the requirements of Article 3.3.5. 4.8.6 Fungus test
The test shall be carried out in accordance with the provisions of JT4522.13, and the results shall meet the requirements of Article 3.3.6. 4.8.7 Electromagnetic interference
The test shall be carried out in accordance with JT4522.14 (Group D equipment), and the results shall meet the requirements of Article 3.3.7. GB/T15309—94
Test method for standard temperature field of saturated salt solution and glycerol solution (reference)
'A1 Preparation requirements and test method for standard humidity field of saturated salt solution A1.7 Select several groups of clean constant temperature closed tanks and inject saturated salt solution of required concentration to half full in advance. The salt used to prepare the solution must meet the requirements of chemically pure or analytically pure reagents, and no less than 1/4 of the salt crystals must be present in the solution. The conductivity of steamed stuffing water for preparing saturated salt solution should be less than 10s/m. When the water vapor in the space of the constant temperature closed saturated salt solution detection tank reaches evaporation-condensation equilibrium, there is a constant relative humidity value. The relative humidity values of several saturated salt solutions at 5-60℃ and below 0℃ are shown in Table A1 and Table A2. Table A1
Temperature, °C
Saturated salt solution
Potassium sulfate K,SO
Potassium nitrate KNOs
Potassium fluoride KCI
Ammonium sulfate (NH)SO
Sodium fluoride NaCI
Ammonium nitrate NH.NO
Sodium dichromate
Na,Cr.O,2H,O
Magnesium nitrate
Mg(NO,)2 - 6H,0
Magnesium fluoride MgCl,·6H.o
Potassium acetate CH.COOK
Lithium chloride LiCI·rHO
Temperature, °C
Saturated salt solution
Ammonium fluoride NH.CI
Copper fluoride CuCl.
Sodium bromide NaBr
Calcium nitrate Ca(NO,)
Sodium iodide Nal
Magnesium fluoride MgCl·6H2O
Potassium acetate CH,COOK
Lithium chloride LiCI·cH.O
Relative humidity, %
Relative humidity, %
A1.2 The standard humidity field of saturated salt solution must be verified by the solution vapor pressure measuring device. The solution vapor pressure measuring device is shown in Figure A1. 60||tt ||GB/T15309--94
Figure A1 Device for measuring liquid vapor pressure
1-connected to vacuum pump; 2-drying bottle; 3-three-way piston: 4-gas storage bottle: 5, 6-two-way piston: 7-isobaric gauge with condenser; 8-mercury thermometer; 9-water bath; 10--stirrer; 11-electric furnace, 12-mercury pressure gaugeA1.3Under the condition that the measuring performance of the tested element is not affected, a smaller test tank should be used as much as possible to reduce the time required for the temperature and humidity to reach equilibrium.
A1.4During the test, salt frost formed by saturated salt solution should be prevented from damaging the ship cargo hold humidity meter. The ship cargo hold humidity meter made of copper or copper alloy materials should not be tested with saturated ammonium salt solution. A2 Preparation requirements and test methods of glycerol C, Hs (OH) solution standard humidity field Select several groups of clean constant temperature closed tanks and inject the required concentration of glycerol solution to half full in advance. When glycerol is used to prepare the solution, it must meet the requirements of analytical pure reagents; when distilled water is used to prepare the glycerol solution, the conductivity should be less than 10s/m. In the constant temperature and closed detection tank space of the glycerol solution of a certain concentration, when the water vapor reaches the evaporation-condensation equilibrium, it has a constant relative humidity value. The relative humidity values of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. The relative humidity of glycerol solutions with various weight percentage concentrations at 25°C has a certain correlation with the refractive index of the solution. The standard humidity field of the glycerol solution must be verified by a refractometer. The relative humidity and refractive index of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. Table A3
Relative humidity
Glycerol concentration
Note: ①The detection range of the refractometer is 1.33~1.47. The accuracy is ±0.001.6
Density (25℃)
Refractive index n (25℃)
GB/T15309-94
②During the detection, the glycerol solution should be prevented from overflowing and damaging the ship cargo hold humidity meter. Additional remarks:
This standard was proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Metrology Research Institute of the Ministry of Transport. This standard was drafted by Shanghai Maritime University and the Standardization and Metrology Research Institute of the Ministry of Transport. The main drafters of this standard are Gao Jianping, Shuai Zhikang and Jin Shengli. (Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Ship Cargo Hold Temperature and Humidity Instrument
Technical Requirements and Test Methods
GB/T15309--94
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 852211 2
Printed by China Standard Press, Qinhuangdao Printing Factory, Xinhua Bookstore, Beijing Distribution Office, Xinhua Bookstores in all regions, copyright reserved, no reproduction allowed
Format: 880×12301/16 Printing sheet: 3/4 Word count: 13,000 words First edition: July 1995 First printing: July 1995 Print run: 1--1500
Book number: 155066·1-11754
Heading: 269-402 Test requirements
The standard humidity test tank should be applicable to the test of the ship cargo hold humidity meter and meet the following performance requirements. The humidity field in the test tank is uniform and stable, the horizontal relative humidity difference in the working area is not greater than 0.2%, the vertical relative humidity difference is not greater than a.
b, and the relative humidity change rate in the test tank is not greater than 0.5% per minute. 4.6.3 Test method
4.6.3.1 Place the test sensor in a container containing saturated salt solution, close to the liquid surface, but not touching the liquid surface. Place a temperature measuring element near the sensor in the container, and its measurement accuracy should not be less than 0.2℃. After sealing the container, place it in a constant temperature bath, and observe the temperature in the container and the output value of the sensor under test every 10~20 minutes. 4.6.3.2 When the output value of the sensor under test remains unchanged for three consecutive times or has no obvious directional changes, start recording data. 3
GB/T15309—94
4.6.3.3 Under the same temperature condition, select three saturated salt solutions with different humidity, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use the propylene glycol solution of the corresponding standard humidity for constant temperature and sealing verification. The error of the detected relative humidity should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature and sealed humidity detection tank, and control the temperature at 60℃ and 10℃ respectively. Use a hygrometer to read the relative humidity, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the relative humidity range of 30% to 95% (see Appendix A). Use the method in Article 4.6 to check its accuracy, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental tests
4.8.1 High temperature test
The test shall be carried out in accordance with the provisions of GB2423.1 and GB2423.2. The results shall meet the requirements of Article 3.3.1. 4.8.2 Steady heat and humidity test
The test shall be carried out in accordance with the provisions of GB2423.3. The results shall meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10. The results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11. The results shall meet the requirements of Article 3.3.4. 4.8.5 Salt spray test
The test shall be carried out in accordance with the provisions of GB2423.17. The results shall meet the requirements of Article 3.3.5. 4.8.6 Fungus test
Test according to the provisions of JT4522.13, and the results shall meet the requirements of Article 3.3.6. 4.8.7 Electromagnetic interference
Test according to JT4522.14 (D group equipment), and the results shall meet the requirements of Article 3.3.7. GB/T15309-94
Test method for standard temperature field of saturated salt solution and glycerol solution (reference)
'A1 Preparation requirements and test methods for standard humidity field of saturated salt solution A1.7 Select several groups of clean constant temperature closed tanks, and inject saturated salt solution of required concentration to half full in advance. The salt used to prepare the solution must meet the requirements of chemically pure or analytically pure reagents, and no less than 1/4 of the salt crystals must be present in the solution. The conductivity of steamed stuffing water for preparing saturated salt solution should be less than 10s/m. When the water vapor in the space of the constant temperature closed saturated salt solution detection tank reaches evaporation-condensation equilibrium, there is a constant relative humidity value. The relative humidity values of several saturated salt solutions at 5-60℃ and below 0℃ are shown in Table A1 and Table A2. Table A1
Temperature, °C
Saturated salt solution
Potassium sulfate K,SO
Potassium nitrate KNOs
Potassium fluoride KCI
Ammonium sulfate (NH)SO
Sodium fluoride NaCI
Ammonium nitrate NH.NO
Sodium dichromate
Na,Cr.O,2H,O
Magnesium nitrate
Mg(NO,)2 - 6H,0
Magnesium fluoride MgCl,·6H.o
Potassium acetate CH.COOK
Lithium chloride LiCI·rHO
Temperature, °C
Saturated salt solution
Ammonium fluoride NH.CI
Copper fluoride CuCl.
Sodium bromide NaBr
Calcium nitrate Ca(NO,)
Sodium iodide Nal
Magnesium fluoride MgCl·6H2O
Potassium acetate CH,COOK
Lithium chloride LiCI·cH.O
Relative humidity, %
Relative humidity, %
A1.2 The standard humidity field of saturated salt solution must be verified by the solution vapor pressure measuring device. The solution vapor pressure measuring device is shown in Figure A1. 60||tt ||GB/T15309--94
Figure A1 Device for measuring liquid vapor pressure
1-connected to vacuum pump; 2-drying bottle; 3-three-way piston: 4-gas storage bottle: 5, 6-two-way piston: 7-isobaric gauge with condenser; 8-mercury thermometer; 9-water bath; 10--stirrer; 11-electric furnace, 12-mercury pressure gaugeA1.3Under the condition that the measuring performance of the tested element is not affected, a smaller test tank should be used as much as possible to reduce the time required for the temperature and humidity to reach equilibrium.
A1.4During the test, salt frost formed by saturated salt solution should be prevented from damaging the ship cargo hold humidity meter. The ship cargo hold humidity meter made of copper or copper alloy materials should not be tested with saturated ammonium salt solution. A2 Preparation requirements and test methods of glycerol C, Hs (OH) solution standard humidity field Select several groups of clean constant temperature closed tanks and inject the required concentration of glycerol solution to half full in advance. When glycerol is used to prepare the solution, it must meet the requirements of analytical pure reagents; when distilled water is used to prepare the glycerol solution, the conductivity should be less than 10s/m. In the constant temperature and closed detection tank space of the glycerol solution of a certain concentration, when the water vapor reaches the evaporation-condensation equilibrium, it has a constant relative humidity value. The relative humidity values of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. The relative humidity of glycerol solutions with various weight percentage concentrations at 25°C has a certain correlation with the refractive index of the solution. The standard humidity field of the glycerol solution must be verified by a refractometer. The relative humidity and refractive index of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. Table A3
Relative humidity
Glycerol concentration
Note: ①The detection range of the refractometer is 1.33~1.47. The accuracy is ±0.001.6
Density (25℃)
Refractive index n(25℃)
GB/T15309-94
②During the test, the glycerol solution should be prevented from overflowing and damaging the ship cargo hold humidity meter. Additional remarks:
This standard was proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Metrology Research Institute of the Ministry of Transport. This standard was drafted by Shanghai Maritime University and the Standardization and Metrology Research Institute of the Ministry of Transport. The main drafters of this standard are Gao Jianping, Shuai Zhikang and Jin Shengli. (Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Ship Cargo Hold Temperature and Humidity Instrument
Technical Requirements and Test Methods
GB/T15309--94
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 852211 2
Printed by China Standard Press, Qinhuangdao Printing Factory, Xinhua Bookstore, Beijing Distribution Office, Xinhua Bookstores in all regions, copyright reserved, no reproduction allowed
Format: 880×12301/16 Printing sheet: 3/4 Word count: 13,000 words First edition: July 1995 First printing: July 1995 Print run: 1--1500
Book number: 155066·1-11754
Heading: 269-402 Test requirements
The standard humidity test tank should be applicable to the test of the ship cargo hold humidity meter and meet the following performance requirements. The humidity field in the test tank is uniform and stable, the horizontal relative humidity difference in the working area is not greater than 0.2%, the vertical relative humidity difference is not greater than a.
b, and the relative humidity change rate in the test tank is not greater than 0.5% per minute. 4.6.3 Test method
4.6.3.1 Place the test sensor in a container containing saturated salt solution, close to the liquid surface, but not touching the liquid surface. Place a temperature measuring element near the sensor in the container, and its measurement accuracy should not be less than 0.2℃. After sealing the container, place it in a constant temperature bath, and observe the temperature in the container and the output value of the sensor under test every 10~20 minutes. 4.6.3.2 When the output value of the sensor under test remains unchanged for three consecutive times or has no obvious directional changes, start recording data. 3
GB/T15309—94
4.6.3.3 Under the same temperature condition, select three saturated salt solutions with different humidity, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use the propylene glycol solution of the corresponding standard humidity for constant temperature and sealing verification. The error of the detected relative humidity should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature and sealed humidity detection tank, and control the temperature at 60℃ and 10℃ respectively. Use a hygrometer to read the relative humidity, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the relative humidity range of 30% to 95% (see Appendix A). Use the method in Article 4.6 to check its accuracy, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental tests
4.8.1 High temperature test
The test shall be carried out in accordance with the provisions of GB2423.1 and GB2423.2. The results shall meet the requirements of Article 3.3.1. 4.8.2 Steady heat and humidity test
The test shall be carried out in accordance with the provisions of GB2423.3. The results shall meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10. The results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11. The results shall meet the requirements of Article 3.3.4. 4.8.5 Salt spray test
The test shall be carried out in accordance with the provisions of GB2423.17. The results shall meet the requirements of Article 3.3.5. 4.8.6 Fungus test
Test according to the provisions of JT4522.13, and the results shall meet the requirements of Article 3.3.6. 4.8.7 Electromagnetic interference
Test according to JT4522.14 (D group equipment), and the results shall meet the requirements of Article 3.3.7. GB/T15309-94
Test method for standard temperature field of saturated salt solution and glycerol solution (reference)
'A1 Preparation requirements and test methods for standard humidity field of saturated salt solution A1.7 Select several groups of clean constant temperature closed tanks, and inject saturated salt solution of required concentration to half full in advance. The salt used to prepare the solution must meet the requirements of chemically pure or analytically pure reagents, and no less than 1/4 of the salt crystals must be present in the solution. The conductivity of steamed stuffing water for preparing saturated salt solution should be less than 10s/m. When the water vapor in the space of the constant temperature closed saturated salt solution detection tank reaches evaporation-condensation equilibrium, there is a constant relative humidity value. The relative humidity values of several saturated salt solutions at 5-60℃ and below 0℃ are shown in Table A1 and Table A2. Table A1
Temperature, °C
Saturated salt solution
Potassium sulfate K,SO
Potassium nitrate KNOs
Potassium fluoride KCI
Ammonium sulfate (NH)SO
Sodium fluoride NaCI
Ammonium nitrate NH.NO
Sodium dichromate
Na,Cr.O,2H,O
Magnesium nitrate
Mg(NO,)2 - 6H,0
Magnesium fluoride MgCl,·6H.o
Potassium acetate CH.COOK
Lithium chloride LiCI·rHO
Temperature, °C
Saturated salt solution
Ammonium fluoride NH.CI
Copper fluoride CuCl.
Sodium bromide NaBr
Calcium nitrate Ca(NO,)
Sodium iodide Nal
Magnesium fluoride MgCl·6H2O
Potassium acetate CH,COOK
Lithium chloride LiCI·cH.O
Relative humidity, %
Relative humidity, %
A1.2 The standard humidity field of saturated salt solution must be verified by the solution vapor pressure measuring device. The solution vapor pressure measuring device is shown in Figure A1. 60||tt ||GB/T15309--94
Figure A1 Device for measuring liquid vapor pressure
1-connected to vacuum pump; 2-drying bottle; 3-three-way piston: 4-gas storage bottle: 5, 6-two-way piston: 7-isobaric gauge with condenser; 8-mercury thermometer; 9-water bath; 10--stirrer; 11-electric furnace, 12-mercury pressure gaugeA1.3Under the condition that the measuring performance of the tested element is not affected, a smaller test tank should be used as much as possible to reduce the time required for the temperature and humidity to reach equilibrium.
A1.4During the test, salt frost formed by saturated salt solution should be prevented from damaging the ship cargo hold humidity meter. The ship cargo hold humidity meter made of copper or copper alloy materials should not be tested with saturated ammonium salt solution. A2 Preparation requirements and test methods of glycerol C, Hs (OH) solution standard humidity field Select several groups of clean constant temperature closed tanks and inject the required concentration of glycerol solution to half full in advance. When glycerol is used to prepare the solution, it must meet the requirements of analytical pure reagents; when distilled water is used to prepare the glycerol solution, the conductivity should be less than 10s/m. In the constant temperature and closed detection tank space of the glycerol solution of a certain concentration, when the water vapor reaches the evaporation-condensation equilibrium, it has a constant relative humidity value. The relative humidity values of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. The relative humidity of glycerol solutions with various weight percentage concentrations at 25°C has a certain correlation with the refractive index of the solution. The standard humidity field of the glycerol solution must be verified by a refractometer. The relative humidity and refractive index of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. Table A3
Relative humidity
Glycerol concentration
Note: ①The detection range of the refractometer is 1.33~1.47. The accuracy is ±0.001.6
Density (25℃)
Refractive index n(25℃)
GB/T15309-94
②During the test, the glycerol solution should be prevented from overflowing and damaging the ship cargo hold humidity meter. Additional remarks:
This standard was proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Metrology Research Institute of the Ministry of Transport. This standard was drafted by Shanghai Maritime University and the Standardization and Metrology Research Institute of the Ministry of Transport. The main drafters of this standard are Gao Jianping, Shuai Zhikang and Jin Shengli. (Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Ship Cargo Hold Temperature and Humidity Instrument
Technical Requirements and Test Methods
GB/T15309--94
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 852211 2
Printed by China Standard Press, Qinhuangdao Printing Factory, Xinhua Bookstore, Beijing Distribution Office, Xinhua Bookstores in all regions, copyright reserved, no reproduction allowed
Format: 880×12301/16 Printing sheet: 3/4 Word count: 13,000 words First edition: July 1995 First printing: July 1995 Print run: 1--1500
Book number: 155066·1-11754
Heading: 269-403 Select three saturated salt solutions with different humidity under the same temperature condition, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use the propylene glycol solution with the corresponding standard humidity for constant temperature and sealing verification. The error of the detected relative humidity should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature and sealed humidity detection tank, and control the temperature at 60℃ and 10℃ respectively. Use a hygrometer to read the relative humidity, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the range of relative humidity of 30% to 95% (see Appendix A). Use the method in Article 4.6 to check its accuracy, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental testwww.bzxz.net
4.8.1 High temperature test
Perform the test in accordance with the provisions of GB2423.1 and GB2423.2, and the result should meet the requirements of Article 3.3.1. 4.8.2 Steady-state humidity test
The test shall be carried out in accordance with the provisions of GB2423.3. The results shall meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10. The results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11. The results shall meet the requirements of Article 3.3.4. 4.8.5 Salt spray test
The test shall be carried out in accordance with the provisions of GB2423.17. The results shall meet the requirements of Article 3.3.5. 4.8.6 Fungus test
The test shall be carried out in accordance with the provisions of JT4522.13. The results shall meet the requirements of Article 3.3.6. 4.8.7 Electromagnetic interference
The test shall be carried out in accordance with JT4522.14 (Group D equipment). The results shall meet the requirements of Article 3.3.7. GB/T15309—94
Test method for standard temperature field of saturated salt solution and glycerol solution (reference)
'A1 Preparation requirements and test method for standard humidity field of saturated salt solution A1.7 Select several groups of clean constant temperature closed tanks and inject saturated salt solution of required concentration to half full in advance. The salt used to prepare the solution must meet the requirements of chemically pure or analytically pure reagents, and no less than 1/4 of the salt crystals must be present in the solution. The conductivity of steamed stuffing water for preparing saturated salt solution should be less than 10s/m. When the water vapor in the space of the constant temperature closed saturated salt solution detection tank reaches evaporation-condensation equilibrium, there is a constant relative humidity value. The relative humidity values of several saturated salt solutions at 5-60℃ and below 0℃ are shown in Table A1 and Table A2. Table A1
Temperature, °C
Saturated salt solution
Potassium sulfate K,SO
Potassium nitrate KNOs
Potassium fluoride KCI
Ammonium sulfate (NH)SO
Sodium fluoride NaCI
Ammonium nitrate NH.NO
Sodium dichromate
Na,Cr.O,2H,O
Magnesium nitrate
Mg(NO,)2 - 6H,0
Magnesium fluoride MgCl,·6H.o
Potassium acetate CH.COOK
Lithium chloride LiCI·rHO
Temperature, °C
Saturated salt solution
Ammonium fluoride NH.CI
Copper fluoride CuCl.
Sodium bromide NaBr
Calcium nitrate Ca(NO,)
Sodium iodide Nal
Magnesium fluoride MgCl·6H2O
Potassium acetate CH,COOK
Lithium chloride LiCI·cH.O
Relative humidity, %
Relative humidity, %
A1.2 The standard humidity field of saturated salt solution must be verified by the solution vapor pressure measuring device. The solution vapor pressure measuring device is shown in Figure A1. 60||tt ||GB/T15309--94
Figure A1 Device for measuring liquid vapor pressure
1-connected to vacuum pump; 2-drying bottle; 3-three-way piston: 4-gas storage bottle: 5, 6-two-way piston: 7-isobaric gauge with condenser; 8-mercury thermometer; 9-water bath; 10--stirrer; 11-electric furnace, 12-mercury pressure gaugeA1.3Under the condition that the measuring performance of the tested element is not affected, a smaller test tank should be used as much as possible to reduce the time required for the temperature and humidity to reach equilibrium.
A1.4During the test, salt frost formed by saturated salt solution should be prevented from damaging the ship cargo hold humidity meter. The ship cargo hold humidity meter made of copper or copper alloy materials should not be tested with saturated ammonium salt solution. A2 Preparation requirements and test methods of glycerol C, Hs (OH) solution standard humidity field Select several groups of clean constant temperature closed tanks and inject the required concentration of glycerol solution to half full in advance. When glycerol is used to prepare the solution, it must meet the requirements of analytical pure reagents; when distilled water is used to prepare the glycerol solution, the conductivity should be less than 10s/m. In the constant temperature and closed detection tank space of the glycerol solution of a certain concentration, when the water vapor reaches the evaporation-condensation equilibrium, it has a constant relative humidity value. The relative humidity values of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. The relative humidity of glycerol solutions with various weight percentage concentrations at 25°C has a certain correlation with the refractive index of the solution. The standard humidity field of the glycerol solution must be verified by a refractometer. The relative humidity and refractive index of glycerol solutions with several weight percentage concentrations at 25°C are shown in Table A3. Table A3
Relative humidity
Glycerol concentration
Note: ①The detection range of the refractometer is 1.33~1.47. The accuracy is ±0.001.6
Density (25℃)
Refractive index n(25℃)
GB/T15309-94
②During the test, the glycerol solution should be prevented from overflowing and damaging the ship cargo hold humidity meter. Additional remarks:
This standard was proposed by the Ministry of Transport of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Metrology Research Institute of the Ministry of Transport. This standard was drafted by Shanghai Maritime University and the Standardization and Metrology Research Institute of the Ministry of Transport. The main drafters of this standard are Gao Jianping, Shuai Zhikang and Jin Shengli. (Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Ship Cargo Hold Temperature and Humidity Instrument
Technical Requirements and Test Methods
GB/T15309--94
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 852211 2
Printed by China Standard Press, Qinhuangdao Printing Factory, Xinhua Bookstore, Beijing Distribution Office, Xinhua Bookstores in all regions, copyright reserved, no reproduction allowed
Format: 880×12301/16 Printing sheet: 3/4 Word count: 13,000 words First edition: July 1995 First printing: July 1995 Print run: 1--1500
Book number: 155066·1-11754
Heading: 269-403 Select three saturated salt solutions with different humidity under the same temperature condition, and set the detection points as 30%, 65% and 95% relative humidity. The deviation between the actual test point and the specified test point should not exceed ±2%. Then use the propylene glycol solution with the corresponding standard humidity for constant temperature and sealing verification. The error of the detected relative humidity should not be greater than ±1%. 4.7 Test of humidity measurement range
Use saturated magnesium chloride solution and saturated potassium nitrate solution to make a constant temperature and sealed humidity detection tank, and control the temperature at 60℃ and 10℃ respectively. Use a hygrometer to read the relative humidity, which should be 30% and 95% respectively. At the same time, pay attention to selecting certain saturated salt solutions within the range of relative humidity of 30% to 95% (see Appendix A). Use the method in Article 4.6 to check its accuracy, and the result should meet the requirements of Article 3.2.6. 4.8 Environmental test
4.8.1 High temperature test
Perform the test in accordance with the provisions of GB2423.1 and GB2423.2, and the result should meet the requirements of Article 3.3.1. 4.8.2 Steady-state humidity test
The test shall be carried out in accordance with the provisions of GB2423.3. The results shall meet the requirements of Article 3.3.2. 4.8.3 Vibration test
The test shall be carried out in accordance with the provisions of GB2423.10. The results shall meet the requirements of Article 3.3.3. 4.8.4 Tilt and swing test
The test shall be carried out in accordance with the provisions of JT4522.11. The results shall meet the requirements of Arti
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