GB/T 4834-2001 Direct reading/non-direct reading capacitive pocket dosimeter
Some standard content:
ICS_17.200
National Standard of the People's Republic of China
GB/T4834—2001
neq Is0 11934: 1997
Direct or indirect-reading capacitor-type pocket dosemeters
2001-11-16 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
2002-06-01 Implementation
GB/T4834—2001
Cited Standards
Electricity
Product Classification
Standard Test Conditions for Dosimeters
6 Technical Requirements
Test Methods…
8 Inspection Rules
9 Marking, Packaging Packaging, transportation and storage
Appendix A (Standard Appendix) Technical requirements and test methods for direct-reading dosimeter chargers Appendix B (Suggestive Appendix) Calibration and inspection of dosimeters 12
GB/T4834-2001
This standard is a non-equivalent revision of GB/I4834-1995 "Direct-reading Galvanometer-type Radiation Dosimeter" using ISO11934:1997 and changes the standard name to "Direct-reading/non-direct-reading capacitor-type pocket dosimeter", replacing the original standard GB/T4834-1995. This standard makes the following revisions to the original standard: 1 Name of dosimeter
The original standard called the dosimeter "galvanometer-type radiation dosimeter". This revision is changed to "Direct-reading/non-direct-reading capacitor-type pocket dosimeter" according to [ISO11934-1995].
2 Standard Content
The original standard includes two parts: direct-reading radiation dosimeter and charger. IS011934 includes technical requirements and test methods for direct-reading and non-direct-reading pocket dosimeters, but does not include technical requirements and test methods for chargers. Therefore, the relevant requirements for non-direct-reading pocket dosimeters were added during the revision, and the relevant contents of the charger were listed in Appendix A (Appendix to the Standard). Appendix A "Calibration and Verification of Dosimeters" (Supplementary Part) in the original standard is listed in Appendix B (Suggested Appendix) 3 Technical Indicators
3.1 Some technical indicators of the original standard are higher than those of IS011934:1997, and some indicators are lower (such as *drop). According to the actual use needs of dosimeters and the actual production level of domestic dosimeter manufacturers, "drop" maintains the original standard requirements, and other indicators have been slightly adjusted.
3. 2 The original standard proposed the radiation characteristics and reading stability in different environments separately, and evaluated them separately; ISO 11934 proposed the two requirements together, "conducting tests and assessments together." Considering that the radiation characteristics test equipment in different environments is more complicated and the test is more difficult, and the dosimeters involved in this standard are all sealed structures, their radiation characteristics should not be affected in different environments, so this revision still proposes the two requirements separately and tests and assesses them separately; similarly, due to the sealed structure of the dosimeter, the influence of moisture can be considered, so "wet heat exposure" and "wet heat storage" are cancelled.
3.3 The leakage current at room temperature in the original standard was changed to zero point stability according to the name in ISO11934. 3.41 The indicators such as reading stability, batch consistency, linearity, decontamination test, β response, and neutron response in ISO11934 were not in the original standard: according to the actual use of dosimeters, "reading stability", "β response", and "neutron response" were added during the revision. Other indicators were not selected.
3.5 The "dose rate response" and "reliability test" in the original standard were deleted. From the date of implementation, this standard will replace GB/T4834-1995. Appendix A in this standard is a mandatory appendix. Appendix B in this standard is a suggestive appendix. This standard is proposed by China National Nuclear Corporation. This standard is under the jurisdiction of the Nuclear Industry Standardization Research Institute. The drafting unit of this standard is "Beijing Nuclear Instrument". Drafters of this standard: Zhou Jiadian, Wu Kejun. This standard was first issued in 1984 and first revised in 1995. Scope
National Standard of the People's Republic of China
Direct or indirect-reading capacitor-type pocket dosemeters
GB/T 4834-2001
neq ISO 11934: 1997
Replaces GB/T 4183-1--1995
This standard specifies the technical requirements, test methods and inspection rules for direct-reading/non-self-reading capacitor-type pocket dosemeters. This standard applies to electroporation pocket dosemeters that measure the cumulative dose of X-ray radiation with an energy of 20keV~3MeV. Vacuum chamber type dosemeters can be used as a reference.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards: G13/T 2423.17—1993 Basic environmental test procedures for electronic products Test Ka: Salt spray test method (eqv IEC 60068-2-11:1981)
CB/T2423.38—1990 Basic environmental test procedures for electronic products Test R: Water test method GB/T8993—1998 Environmental conditions and test methods for nuclear instruments GB/T102572001 Quality inspection rules for nuclear instruments and nuclear radiation detectors (1euIEC60410) GB 12162—1990 X,Y reference radiation for calibrating dosimeters and dose rate meters and determining their energy response (idt 1S0) 4037:1979)
EJ/T1059—1998 General technical requirements for nuclear instrument product packaging 3 Definitions
The following definitions are adopted in this technical standard.
3.1 Dose dose
A measure of the radiation received or "absorbed" by a certain object. Depending on the context, it can refer to absorbed dose, organ dose, equivalent dose, effective dose, committed equivalent dose and committed effective dose. 3.2 Absorbed dose D) The quotient obtained by dividing dm by le, that is;
dm (Gy)
Where: le - the average energy imparted by ionizing radiation to a mass of dm. 3.3 Personal absorbed dose D, (10) personal absorbed dose The absorbed dose of soft tissue at a specified point 10 mIn below the surface of the human body, the unit is J/kg, the special name is gray (Gy). 3. 4 Personal dose equivalent H, (d) persnnal dose cnuivalent(1)
Dose equivalent in soft tissue at an appropriate depth below a finger point on the human body. Personal dose equivalent is applicable to strong penetrating radiation. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on November 16, 2001 and implemented on June 1, 2002
GB/T 4834 2001
Also applicable to weak penetrating radiation. For strong penetrating radiation, the recommended depth is d=10mm. For weak penetrating radiation, the recommended depth is d=0.07mm. The unit of personal dose equivalent is J/kg, and the special name is sievert (Sv). 3.5 Dosemeters
Instruments for measuring absorbed dose or dose equivalent, etc. 3.6 Direct-reading capacitor type pocket dosemeters are devices used for personal monitoring and can directly read radiation dose values. Note: This device consists of an ionization chamber connected to a capacitor, and the capacitor and charging device are charged to deflect the charge indicator line. Charging The electrical device can be built into the dosimeter or it can be independent. The deflection of the indicator line can be read on the scale through the optical system. If the dosimeter is exposed to radiation, the ionization in the ionization chamber causes the charge on the capacitor to decrease, and the charge indicator line deflects accordingly. The maximum amount of radiation exposure to the dosimeter can be read through the scale.
3.7 Indlirect-reading capacitor-type pocket dose meters Capacitive pocket dose meters, the dose value measured by the capacitive pocket dose meter can be read from a separate reader. 3.8 Geutrupism
The change in the indication value when the orientation of the dosimeter relative to the ground is different. 3.9 Indication line
The imaging of the conductive wire of the electroscope in the optical system of the dosimeter. 3.10 Charging to zero point The indication line of the dosimeter is charged until it finally coincides with the zero scale line. 3.11 Thermomechanical equilibrium thermomechanical equilibrium The change of the indication value of the dosimeter indication line caused by different temperatures. 3-12 Effective range
The upper and lower limits of the measurement range that meets the requirements of this standard. 3.13 Conventional true value. The greatest estimate of the numerical value of a quantity, which is usually determined by a reference or secondary standard, or by a reference instrument that has been calibrated according to the reference or secondary standard. 3.14 Accuracy
The degree of conformity between the indication value and the conventional true value. 3.15 Relative intrinsic error relative intrinsic crror The relative error of the indication value of the dosimeter under reference conditions relative to its conventional true value. 4 Product classification
Dosimeters can be classified according to the full scale indication value and the applicable energy range. 4.1 Classification by full scale indication value
Dosimeters can be divided into low-range dosimeters and high-range dosimeters: Dosimeters with full scale indication values lower than 50 c.Sv are low-range dosimeters, and their specifications generally include full scale values of 1 mSv, 2 mSv, 5 mSy, 1 cSv, 5 cSv and 10 cSv. Dosimeters with full scale indication values equal to and higher than 50 cGy are high-range dosimeters, and their specifications generally include 50 cGy, 1 Gy and 5 Gy.
4.2 Classification by energy range
Dose meters can be divided into low-energy dose meters and high-energy dose meters: dose meters suitable for measuring X radiation with an energy of 20 keV~-100 keV are low-energy dose meters; dose meters suitable for measuring X and Y radiation with an energy of 50 keV~3 MeV are high-energy dose meters. 2
5 Standard test conditions for dose meters
5.1 Reference conditions
Temperature: 20℃#
Relative humidity: 65%;
Air pressure: 101.3kPa
GB/T 4834 — 2001
Environmental radiation background: dose equivalent rate H* (10) 0.1μSv/h. 5.2 Standard test conditions
Temperature: 18℃~22℃
Relative humidity: 50%~75%;
Atmospheric pressure: 86kPa～106kPa;
Environmental radiation background: Dose equivalent rate H(10) 0.25 μSv/h. The actual test conditions should be stated in the test report. The test conditions should not change too much or too quickly during the test. 5.3 Irradiation conditions
The reference radiation used for calibration should comply with the provisions of GB 12162. Low-energy dosimeters use 34:Am reference radiation sources; high-energy dosimeters use 137Cs or Co reference radiation sources. The calibration quantity should be monitored by instruments that are traceable to national standards. Except for special irradiation, the radiation should be perpendicular to the dosimeter axis during irradiation. The distance from the radiation source to the dosimeter is the distance from the radiation source equivalent point to the geometric center of the dosimeter sensitive volume.
The irradiation room and calibration equipment shall meet the following requirements: a) The workbench and support frame shall be made of materials with low atomic number and have minimum mass; b) If several dosimeters are irradiated together, the distance between them shall minimize the mutual influence of their readings; the difference between the reading of a dosimeter irradiated together with other dosimeters and the reading of it irradiated alone at the same position shall be less than 3%; c) In order to obtain the same calibration value for several dosimeters, their supports shall be placed on contour lines with the same dose rate. 6 Technical requirements
6.1 Appearance and structural characteristics
6.1.1 Appearance
The outer surface of the dosimeter shall be smooth and free of damage, and the serial number shall be clear and firm. 6.1.2 Dimensions and weight
The direct-reading dosimeter is cylindrical, with an outer diameter (excluding the clip and trademark) of 12.5mm~16mm, a length of no more than 130mm, and a total weight of no more than 60g.
The dimensions and weight of the non-direct-reading dosimeter shall be specified by the manufacturer in the product specification. 6.1.3 Clip
The clip of the dosimeter shall be firmly installed, not loose, and without scratches. It shall not come loose after being worn on the body. 6.1.4 Charging terminal
6.1.4.1 The charging terminal of the direct-reading dosimeter shall match the charger socket. The dimensions of the charging terminal are shown in Figure 1. &) Distance from charging terminal to charging contact: The distance from the charging end face of the dosimeter to the charging contact is (6 ± 0.9) mm in the charging position and at least 4 mm in the normal position; h) Inner diameter of charging terminal: Within the range of at least 5 mm depth of the charging end of the dosimeter, its inner diameter is 9 ± 1 mm; c) Charging contact diameter: The charging contact diameter should be 1 mm~2.5 mm; if it is tubular, its wall thickness should be at least 0.2 mm, and the end should be sealed:
d) Electrode coaxiality: The coaxiality of the charging contact to the inner circle of the charging end of the dosimeter should be 0.6 mm3
Charging contact
GB/T 4834
Figure 1 Schematic diagram of charging terminal structure dimensions
6.1.4.2 The dimensions of the charging terminal of the non-direct reading dosimeter are specified by the manufacturer in the product standard. 6.2 Optical system characteristics of direct reading dosimeters 6.2. 1 Materials
Charging end
Optical system All materials should be free of damage and color change after being exposed to the light, heat and ionizing radiation specified in the test. 6.2.2 Clarity
When the dosimeter is illuminated by a diffuse light source, the illumination of the charging end is 551x, and the distance between the indicator line and the scale line is one-fourth of the minimum scale spacing B (as shown in Figure 2), the optical system of the dosimeter should be able to clearly distinguish its position. Indicator line
Figure 2 Schematic diagram of optical system clarity
6.2.3 Parallelism of indicator line and scale line
On the entire scale, the indicator line should be parallel to the scale line, and its non-parallelism should not exceed one-fourth of the minimum scale interval B (as shown in Figure 3B
A
Indicator line
Figure 3 Schematic diagram of parallelism of indicator line and scale line 6.2.4 Ruler
a) The length and division of the ruler scale line should be able to read 2% of the full scale value; h) Within the field of view of the dial, no spots exceeding the width of the scale line are allowed to exist; the number of scattered spots that do not exceed the width of the scale line shall not exceed 5.
6.3 Radiation characteristics
6.3.1 Radiation maximum
GB/T 4834---2001
The radiation dose used in this standard: below 50cSv, the personal dose equivalent H, (10) is used; greater than 50cGy, the personal absorbed dose D, (10) is used.
6-3.2 Reading stability
The change in the indicated value of the dose meter within 8h after irradiation should not exceed ±2% of the full scale value. 6. 3.3 Repeatability
Under the same conditions, the dose meter is continuously irradiated with the same dose for 10 times, and the coefficient of variation of its indicated value should not exceed ±2.5%. 6.3.4 Effective range
The lower limit of the effective range of the dose meter is 20% of the full scale value, and the upper limit is the full scale value. 6.3.5 Relative inherent error
Under standard test conditions, the relative inherent error of the dosimeter shall not exceed ±10% of the agreed value (excluding the expanded uncertainty of the agreed true value of the reference radiation amount).
6.3.6 Leakage after high-dose irradiation
For a dosimeter irradiated with a dose of 50 times the full scale, adjust the dosimeter to zero 1 hour after irradiation and place it under standard test conditions. Read the indicated value immediately after 24 hours. The change in the indicated value of the dosimeter shall not exceed 20% of the full scale value. 6.3.7 Energy response
The response of a low-energy dosimeter to incident X-radiation with an energy range of 20 keV to 100 keV shall not exceed ±30% relative to the response of a reference radiation (low-dose rate X-radiation of 241 Am or 60 keV). The response of high energy dosimeters to human X, Y radiation with energy in the range of 50 keV to 3 MeV shall not exceed ±30% of the response of 13Cs reference radiation due to energy response. 6.3.8 Angular response
When the angle of the dosimeter relative to the horizontal plane and the vertical plane passing through the calibration reference point is between +60° and 60°, the change of its indication value relative to the indication value of 0° shall meet the following requirements: a) For 17Cs (or Co) Y radiation, it shall not exceed ±20% of the value given in Table 1 for 1Cs (or \Cn) Y radiation; h) For 2Am (or 60kcV low dose rate X radiation), it shall not exceed ±50% of the value given in Table 1 for 4lAm (or 60kcV low dose rate X radiation);
±6 to ±50°, the response of the dosimeter shall be as specified in the product standard, Table 1 Angular response value
Reference radiation source
(or 60keV low dose rate X radiation)
Average energy/keV
Note: The parameters in the table are extracted from ISO4037-3
6.4 Electrical characteristics
6.4. 1 Zero point stability
Reading ratio β(a/0°）
#=30°
#=45°
Under standard test conditions, the zero point change caused by the white leakage of the dose meter shall not exceed ±2% of the full scale value every 16 hours. 6.4.2 Zero adjustment characteristics
a) Direct reading dosimeter: The change of the indicated value of the low-range dosimeter after charging shall not exceed 5% of the full scale value; the change of the indicated value of the high-range dosimeter after charging shall not exceed 2% of the full scale value; GB/T 4834—2001
h) Non-direct reading dosimeter: When the dosimeter is fully charged and contacts the reader again, the zero point change shall not exceed 2% of the full scale value. 6.4.3 Charging voltage
The charging voltage corresponding to the "zero" scale line of the direct reading dosimeter shall not be greater than 200V; the charging voltage corresponding to the full scale line shall not be less than 70V. The charging voltage of non-direct-reading dosimeters shall be specified by the manufacturer in the product standard. 6.5 Mechanical properties
6. 5. 1 Geotropism
The change in the indication value of a direct-reading dosimeter due to different reading position orientation shall not exceed ±5% of the full scale value. 6.5.2 Charging pressure of direct-reading dosimeter
The pressure used to keep the charging contact in electrical contact with the electroscope in the dosimeter shall be 11 N~25 N. 6.5.3 Thermomechanical balance
In the temperature range of -10℃ to +10℃, the change in the indication value caused by temperature change of the dosimeter shall not exceed ±5% of the full scale value compared with the standard test conditions.
6.5.4 Switch life
The dosimeter shall still be able to charge and adjust to zero normally after 250 charge and discharge cycles. 6.5.5 Drop
The change of the indication value of the dose meter after it falls freely from a height of 0.5m to the ground shall not exceed ±10% of the full scale value. 6.5.6 Vibration
The dose meter is subjected to a 2g sinusoidal load and vibrates for 15 minutes in the three directions of front, back, left, right and vertical at a frequency of 10Hz~21Hz and 22Hz~33Hz. The change of the indication value after vibration shall not exceed ±10% of the full scale value. 6.6 Environmental adaptability
6.6.1 Air tightness
The dose meter is placed under the condition of 20 Pa pressure for 8 hours and then irradiated. The change of its indication value relative to the indication value under the standard test conditions shall not exceed ±8%.
6.6.2 Temperature test
6.6.2.1 High temperature irradiation
The dose meter is irradiated under the condition of 40°C. The change of the indication value of the dose meter relative to the indication value under the standard test conditions shall not exceed ±10%.
6.6.2.2 High temperature test
After the dosimeter is stored at 60℃ for 1 hour, the change of the indicated value shall not exceed ±5% of the full scale value. 6.6.2.3 Low temperature irradiation
When irradiated at -10℃, the change of the indicated value of the dosimeter with respect to the indicated value under standard test conditions shall not exceed 110%.
6.6.2.4 Low temperature test
After the dosimeter is stored at -10℃ for 4 hours, the change of the indicated value shall not exceed ±5% of the full scale value. 6-6.3 Packaging and transportation
After the dosimeter is packaged, it shall be driven on a third-class highway at a speed of 25km/h~~40km/h for 200km~~250km; or the test shall be conducted using a transport test bench to simulate the above conditions. After the test, the reading stability shall meet the requirements of 6.4.1, and the packaging shall be free of damage, cracks, and deformation. 6.6.4 Water immersion test
After the dose meter is placed in 1m deep water for 1 hour, the change in the indicated value shall not exceed ±5% of the full scale value, and the scale shall be free of water marks when visually inspected. 6.6.5 Salt spray test
After the dose meter is tested for 48 hours according to the requirements of GB/T 2423.17 test Ka, there shall be no corrosion on the outer surface, and the zero point stability shall meet the requirements of 6.4.1.
6.6.6 Neutron and β response
GB/T 4834—2001
For dose meters used for neutron, β and mixed fields, the neutron and β response shall be specified by the manufacturer in the product standard. 7 Test method
7.1 Appearance and structure
7.1.1 Appearance
The outer surface of the dose meter shall be visually inspected and shall meet the requirements of 6.1.1. 7.1.2 Dimensions and weight
The dimensions and weight of the dosimeter shall be checked with measuring tools and scales, and shall meet the requirements of 6.1.2. 7.1.3 Clamp
The clamp of the dosimeter shall be checked by visual inspection and conventional methods, and shall meet the requirements of 6.1.3. 7.1.4 Charging terminal
The charging terminal of the dosimeter shall be checked with a measuring tool, and shall meet the requirements of 6.1.4. 7.2 Characteristics of the optical system
7.2.1 Materials
After all tests are completed, check the scale by visual inspection with natural light, and it shall meet the requirements of 6.2.1. 7.2.2 Clarity
Test with a diffuse light source. When the illumination at the charging terminal of the dosimeter is 551x, the clarity of the optical system shall meet the requirements of 6.2.2. 7.2.3 Parallelism between the indication line and the scale line
The parallelism between the indication line and the scale line of the dose meter shall meet the requirements of 6.2.3 by visual inspection. 7.2.4 Scale
The scale of the dose meter shall meet the requirements of 6.2.4 by visual inspection. 7.3 Radiation characteristics
7.3.1 Reading stability
Irradiate the dose meter with a dose of 50% to 85% of the full scale and read the indicated value (R). Then read the indicated value (R) every 1 hour until the end of 8 hours. Calculate the relative deviation Dmn according to the following formula, which shall meet the requirements of 6.3.2. Dmn = 100(Rmnx — R)/Rmx(%)
Where: Rmnx—full scale value.
7.3.2 Repeatability
Irradiate the dose meter with a dose of 50% to 85% of the full scale and read the indicated value (K). Repeat the process for more than 10 times, and the coefficient of variation V of the indication value shall be calculated as follows, which shall meet the requirements of 6.3.3. V
Wherein R-
-the average value of the indication value for 10 irradiations.
7.3.3 Relative inherent error
—)3/9
Calibrate with a reference radiation source that complies with GB12162: a 41Am reference radiation source is used for low-energy dosimeters; a 137Cs or \Co reference radiation source is used for high-energy dosimeters. During type inspection, the 20%, 50% and 80% points of the full scale value shall be checked; during acceptance inspection, the 80% point of the full scale value shall be checked.
After the dose meter is charged and zeroed, it is worn on the surface of the phantom and placed in a uniform reference radiation field with its axis perpendicular to the direction of the X-ray beam (see Appendix B). The relative inherent error between the dose meter indication value and the agreed true value should not exceed ten (10+2)% (% is the expanded uncertainty of the agreed true value, which should usually be no more than 10%). 7.3.4 Leakage after high-dose irradiation
GB/T4834—2001
The dose meter that has been tested for zero stability with a dose of 50 times the full scale should be irradiated within 1h to 5h. One hour after irradiation, the dose meter should be charged and zeroed and the indication value should be read. Then the dose meter should be stored in the standard test conditions and the indication value should be read after 24h. The change in the indication value should meet the requirements of 6.3.6.
7.3.5 Energy response
Test with X-radiation near 48keV (or 4Am), 87keV, 109keV, 148keV and 211keV in accordance with the low dose rate series of GB12162, as well as 137Cs and \CoY reference radiation. After charging and zeroing, the dosimeter is worn on the surface of the phantom and placed in a uniform reference auxiliary radiation field, with its axis perpendicular to the beam direction (see Appendix B). The irradiation dose at each energy point is 50% of the full scale value. Calculate the ratio of the dosimeter indication value to the dose agreed true value. The low-energy dosimeter is normalized at the 241Am (or 60keV low dose rate X-radiation) energy point, and the high-energy dosimeter is normalized at the 1\Cs energy point. The test results should meet the requirements of 6.3.7.
7.3.6 Angular response
After charging and zeroing the test dosimeter using Am (or 60keV low-dose rate X-radiation) and -\Cs (or \Co) reference radiation in accordance with CB12162, wear it on the surface of the phantom and place it in a uniform reference radiation field, with its axis perpendicular to the direction of the radiation beam (see Appendix 13). The irradiation dose is 50% of the full scale value. The dosimeter and the phantom are rotated relative to the horizontal plane and the vertical plane passing through the calibration reference point of the dosimeter. When the irradiation angle between the dosimeter and the two planes is 0", 30° ± 45° and ± 60°, the indication value is recorded and the deviation of the ratio of the indication value at each angle to 0° is calculated. For 24lAm (or 60keV low dose rate X-ray radiation), the ratio deviation shall not exceed 150% of the value given in Table 1 for 4Am (or 60keV low dose rate X-ray radiation). For 13\Cs or Co reference radiation, the ratio deviation shall not exceed ± 20% of the value given in Table 1 for 1\Cs or Ca. 7.4 Electrical characteristics 7.4.1 Zero point stability Under standard test conditions, the dosimeter is charged and zeroed, and the indication value is read out. The indication value is read out again after 16h of storage. The change of the indication value shall comply with 6 .4.1 requirements.
7.4.2 Zero adjustment characteristics
Charge the dosimeter so that the indication line coincides with the zero scale line, then remove the dosimeter from the charger, short-circuit the charging contact and the outer tube, and read the indication value. The change in the indication value should meet the requirements of 6.4.2. 7.4.3 Charging voltage
Use a calibrated electrostatic voltmeter to measure the charging voltage corresponding to the zero scale line and the charging voltage corresponding to the full scale line of the dosimeter. They should meet the requirements of 6.4.3.
7.5 Mechanical characteristics
7.5.1 Geotropism
Charge the dosimeter to the middle degree, keep it horizontal, read the indication value when the indication line is perpendicular to the ground, then turn it 90° to the left and right, and read the indication value when the indication line is parallel to the ground. The change of each reading relative to the indication line perpendicular to the ground should meet the requirements of 6. 5.1 requirements.
7.5.2 Charging pressure
The charging pressure of the dosimeter shall be measured with a special measuring instrument and shall comply with the requirements of 6.5-2. 7.5.3 Thermomechanical balance
7.5.3.1 Charge and zero the dosimeter, read the indication value under standard test conditions, then place it in a constant temperature box at 40°C ±2°C for 2 hours, take it out, read the indication value immediately, and compare it with the indication value under standard test conditions. The change in indication value shall comply with the requirements of 6.5.3. 7.5.3.2 Charge and zero the dosimeter, read the indication value under standard test conditions, then place it in a constant temperature box at -10°C ±2°C for 2 hours, take it out, read the indication value immediately, and compare it with the indication value under standard test conditions. The change in indication value shall comply with the requirements of 6.5.3. 7.5.4 Switch life
GR/T 4834 --- 2001
Put the dosimeter on the charging socket, plug and unplug and charge and discharge 2500 times, and then test according to the method of 7.4.1. 75,5 Free drop test
The dosimeter is charged to the middle scale, and is freely dropped from a height of 0.5Ⅲ to a 4cm thick hard rubber plate directly on the cement floor. Each dosimeter is dropped horizontally twice, and the two ends are dropped vertically downward once. The change of the indicated value before and after each drop should meet the requirements of 6.5.5.
7.5.6 Vibration test
The dosimeter is charged and zeroed, and the indicated value is recorded. Apply a 2g sinusoidal load to the front, back, left, right, and vertical directions at a frequency of 10 1H12~21 Hz, 22 1Iz~~33 IIz. Each vibration is 15 minutes, and the test results should meet the requirements of 6.5.6. 7.6 Environmental adaptability
7.6.1 Air tightness test
After charging and zeroing, the dose meter is placed in a dedicated vacuum container, and irradiated under standard test conditions (without a phantom), and the indication value is read. After charging and zeroing, the dose meter is placed back to the original position of the vacuum container, and the air pressure is reduced to 2uPa. It is left for 8 hours under this condition, and then irradiated under the same conditions as above (the air pressure is still maintained at 20 Pa), and then the dose meter is taken out to read the indication value. The test results should meet the requirements of Gt1. 7.6.2 Temperature test
7.6.2. 1 Commercial source irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box, and irradiated under standard test conditions. The dose is 80% of the full scale value, and the minimum indication value is recorded. After charging and zeroing, place the dosimeter in its original position. Then raise the temperature of the thermostat to 40℃+2℃, and the thermal equilibrium time is 0.5h. After keeping warm for 2h, take out the dosimeter and record the zero point, then put it back to its original position, and expose the dosimeter. The exposure time and position are alternate with those under standard test conditions. The test results should meet the requirements of 6.6.2.
7.6.2.2 High temperature test
Irradiate the dosimeter to 50~-80% of the full scale, then put the dosimeter into a thermostat at 60±2℃, and take it out after 1h, and read the indication value immediately, and then put the dosimeter back into the thermostat. After keeping warm for 4h, take it out and read the indication value immediately. The change of the indication value should meet the requirements of 6.6.2.2.
7.6.2.3 Low temperature irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the indicated value is recorded. Then the dose meter is charged and zeroed and placed back to the original position. Then the constant temperature box is cooled to 10℃ + 2℃. The thermal equilibrium time is 0.5h. After keeping warm for 2h, the dose meter is taken out and the zero point is recorded. Then it is put back to the original position and the dose meter is irradiated. The irradiation time and position are the same as those under standard test conditions. The test results should meet the requirements of 6.6.2.3. 7.6.2.4 Low temperature test
Irradiate the dose meter to 50% to 80% of the full scale. Then put the dose meter in a constant temperature box at 10C ± 2C. After 1h, take it out and read the indicated value immediately. Then put the dose meter in the constant temperature box. After 4 hours of preservation, take out the instrument and read the indication value. The change of indication value shall meet the requirements of 6.6.2.4.
7.6.3 Packaging and transportation test
The dosimeter is packaged and placed in the middle and rear of a truck, with a loading capacity of one third of the full load (if the weight of the test product cannot meet the requirements, other weights are allowed). Drive 200km~250km on a grade 1 highway (gravel road, dirt road) at a speed of 25km/h-~40km/h; or use a shock test bench to simulate the above conditions in the test space. After the test, it shall meet the requirements of 6.6.3. 7.6.4 Immersion test
The dosimeter is immersed in water to a depth of 1II1, and the test time is 1h. The test is carried out according to the method Rcl specified in 6.2 of GB/T 2423.38--1990. The test results shall meet the requirements of 6.6.1. 7.6.5 Salt spray test
The dosimeter shall be tested for 48 hours in accordance with the relevant provisions of GB/T2423.17 Test Ka. The test results shall meet the requirements of 6.6.5. 8 Inspection rules
8.1 Inspection classification and requirements.6 Angular response
Use Am (or 60keV low dose rate X-radiation) and -\Cs (or \Co) reference radiation in accordance with CB12162 to charge and zero the test dosimeter, wear it on the surface of the phantom and place it in a uniform reference radiation field, with its axis perpendicular to the direction of the radiation beam (see Appendix 13). The irradiation dose is 50% of the full scale value. The dosimeter and the phantom are rotated relative to the horizontal plane and the vertical plane passing through the calibration reference point of the dosimeter. When the irradiation angle between the dosimeter and the two planes is 0", 30° ± 45° and ± 60°, the indication value is recorded and the deviation of the ratio of the indication value at each angle to 0° is calculated. For 24lAm (or 60keV low dose rate X-ray radiation), the ratio deviation shall not exceed 150% of the value given in Table 1 for 4Am (or 60keV low dose rate X-ray radiation). For 13\Cs or Co reference radiation, the ratio deviation shall not exceed ± 20% of the value given in Table 1 for 1\Cs or Ca. 7.4 Electrical characteristics 7.4.1 Zero point stability Under standard test conditions, the dosimeter is charged and zeroed, and the indication value is read out. The indication value is read out again after 16h of storage. The change of the indication value shall comply with 6 .4.1 requirements.
7.4.2 Zero adjustment characteristics
Charge the dosimeter so that the indication line coincides with the zero scale line, then remove the dosimeter from the charger, short-circuit the charging contact and the outer tube, and read the indication value. The change in the indication value should meet the requirements of 6.4.2. 7.4.3 Charging voltage
Use a calibrated electrostatic voltmeter to measure the charging voltage corresponding to the zero scale line and the charging voltage corresponding to the full scale line of the dosimeter. They should meet the requirements of 6.4.3.
7.5 Mechanical characteristics
7.5.1 Geotropism
Charge the dosimeter to the middle degree, keep it horizontal, read the indication value when the indication line is perpendicular to the ground, then turn it 90° to the left and right, and read the indication value when the indication line is parallel to the ground. The change of each reading relative to the indication line perpendicular to the ground should meet the requirements of 6. 5.1 requirements.
7.5.2 Charging pressure
The charging pressure of the dosimeter shall be measured with a special measuring instrument and shall comply with the requirements of 6.5-2. 7.5.3 Thermomechanical balance
7.5.3.1 Charge and zero the dosimeter, read the indication value under standard test conditions, then place it in a constant temperature box at 40°C ±2°C for 2 hours, take it out, read the indication value immediately, and compare it with the indication value under standard test conditions. The change in indication value shall comply with the requirements of 6.5.3. 7.5.3.2 Charge and zero the dosimeter, read the indication value under standard test conditions, then place it in a constant temperature box at -10°C ±2°C for 2 hours, take it out, read the indication value immediately, and compare it with the indication value under standard test conditions. The change in indication value shall comply with the requirements of 6.5.3. 7.5.4 Switch life
GR/T 4834 --- 2001
Put the dosimeter on the charging socket, plug and unplug and charge and discharge 2500 times, and then test according to the method of 7.4.1. 75,5 Free drop test
The dosimeter is charged to the middle scale, and is freely dropped from a height of 0.5Ⅲ to a 4cm thick hard rubber plate directly on the cement floor. Each dosimeter is dropped horizontally twice, and the two ends are dropped vertically downward once. The change of the indicated value before and after each drop should meet the requirements of 6.5.5.
7.5.6 Vibration test
The dosimeter is charged and zeroed, and the indicated value is recorded. Apply a 2g sinusoidal load to the front, back, left, right, and vertical directions at a frequency of 10 1H12~21 Hz, 22 1Iz~~33 IIz. Each vibration is 15 minutes, and the test results should meet the requirements of 6.5.6. 7.6 Environmental adaptability
7.6.1 Air tightness test
After charging and zeroing, the dose meter is placed in a dedicated vacuum container, and irradiated under standard test conditions (without a phantom), and the indication value is read. After charging and zeroing, the dose meter is placed back to the original position of the vacuum container, and the air pressure is reduced to 2uPa. It is left for 8 hours under this condition, and then irradiated under the same conditions as above (the air pressure is still maintained at 20 Pa), and then the dose meter is taken out to read the indication value. The test results should meet the requirements of Gt1. 7.6.2 Temperature test
7.6.2. 1 Commercial source irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box, and irradiated under standard test conditions. The dose is 80% of the full scale value, and the minimum indication value is recorded. After charging and zeroing, place the dosimeter in its original position. Then raise the temperature of the thermostat to 40℃+2℃, and the thermal equilibrium time is 0.5h. After keeping warm for 2h, take out the dosimeter and record the zero point, then put it back to its original position, and expose the dosimeter. The exposure time and position are alternate with those under standard test conditions. The test results should meet the requirements of 6.6.2.
7.6.2.2 High temperature test
Irradiate the dosimeter to 50~-80% of the full scale, then put the dosimeter into a thermostat at 60±2℃, and take it out after 1h, and read the indication value immediately, and then put the dosimeter back into the thermostat. After keeping warm for 4h, take it out and read the indication value immediately. The change of the indication value should meet the requirements of 6.6.2.2.
7.6.2.3 Low temperature irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the indicated value is recorded. Then the dose meter is charged and zeroed and placed back to the original position. Then the constant temperature box is cooled to 10℃ + 2℃. The thermal equilibrium time is 0.5h. After keeping warm for 2h, the dose meter is taken out and the zero point is recorded. Then it is put back to the original position and the dose meter is irradiated. The irradiation time and position are the same as those under standard test conditions. The test results should meet the requirements of 6.6.2.3. 7.6.2.4 Low temperature test
Irradiate the dose meter to 50% to 80% of the full scale. Then put the dose meter in a constant temperature box at 10C ± 2C. After 1h, take it out and read the indicated value immediately. Then put the dose meter in the constant temperature box. After 4 hours of preservation, take out the instrument and read the indication value. The change of indication value shall meet the requirements of 6.6.2.4.
7.6.3 Packaging and transportation test
The dosimeter is packaged and placed in the middle and rear of a truck, with a loading capacity of one third of the full load (if the weight of the test product cannot meet the requirements, other weights are allowed). Drive 200km~250km on a grade 1 highway (gravel road, dirt road) at a speed of 25km/h-~40km/h; or use a shock test bench to simulate the above conditions in the test space. After the test, it shall meet the requirements of 6.6.3. 7.6.4 Immersion test
The dosimeter is immersed in water to a depth of 1II1, and the test time is 1h. The test is carried out according to the method Rcl specified in 6.2 of GB/T 2423.38--1990. The test results shall meet the requirements of 6.6.1. 7.6.5 Salt spray test
The dosimeter shall be tested for 48 hours in accordance with the relevant provisions of GB/T2423.17 Test Ka. The test results shall meet the requirements of 6.6.5. 8 Inspection rules
8.1 Inspection classification and requirements.6 Angular response
Use Am (or 60keV low dose rate X-radiation) and -\Cs (or \Co) reference radiation in accordance with CB12162 to charge and zero the test dosimeter, wear it on the surface of the phantom and place it in a uniform reference radiation field, with its axis perpendicular to the direction of the radiation beam (see Appendix 13). The irradiation dose is 50% of the full scale value. The dosimeter and the phantom are rotated relative to the horizontal plane and the vertical plane passing through the calibration reference point of the dosimeter. When the irradiation angle between the dosimeter and the two planes is 0", 30° ± 45° and ± 60°, the indication value is recorded and the deviation of the ratio of the indication value at each angle to 0° is calculated. For 24lAm (or 60keV low dose rate X-ray radiation), the ratio deviation shall not exceed 150% of the value given in Table 1 for 4Am (or 60keV low dose rate X-ray radiation). For 13\Cs or Co reference radiation, the ratio deviation shall not exceed ± 20% of the value given in Table 1 for 1\Cs or Ca. 7.4 Electrical characteristics 7.4.1 Zero point stability Under standard test conditions, the dosimeter is charged and zeroed, and the indication value is read out. The indication value is read out again after 16h of storage. The change of the indication value shall comply with 6 .4.1 requirements.
7.4.2 Zero adjustment characteristics
Charge the dosimeter so that the indication line coincides with the zero scale line, then remove the dosimeter from the charger, short-circuit the charging contact and the outer tube, and read the indication value. The change in the indication value should meet the requirements of 6.4.2. 7.4.3 Charging voltage
Use a calibrated electrostatic voltmeter to measure the charging voltage corresponding to the zero scale line and the charging voltage corresponding to the full scale line of the dosimeter. They should meet the requirements of 6.4.3.
7.5 Mechanical characteristics
7.5.1 Geotropism
Charge the dosimeter to the middle degree, keep it horizontal, read the indication value when the indication line is perpendicular to the ground, then turn it 90° to the left and right, and read the indication value when the indication line is parallel to the ground. The change of each reading relative to the indication line perpendicular to the ground should meet the requirements of 6. 5.1 requirements.
7.5.2 Charging pressure
The charging pressure of the dosimeter shall be measured with a special measuring instrument and shall comply with the requirements of 6.5-2. 7.5.3 Thermomechanical balance
7.5.3.1 Charge and zero the dosimeter, read the indication value under standard test conditions, then place it in a constant temperature box at 40°C ±2°C for 2 hours, take it out, read the indication value immediately, and compare it with the indication value under standard test conditions. The change in indication value shall comply with the requirements of 6.5.3. 7.5.3.2 Charge and zero the dosimeter, read the indication value under standard test conditions, then place it in a constant temperature box at -10°C ±2°C for 2 hours, take it out, read the indication value immediately, and compare it with the indication value under standard test conditions. The change in indication value shall comply with the requirements of 6.5.3. 7.5.4 Switch life
GR/T 4834 --- 2001
Put the dosimeter on the charging socket, plug and unplug and charge and discharge 2500 times, and then test according to the method of 7.4.1. 75,5 Free drop test
The dosimeter is charged to the middle scale, and is freely dropped from a height of 0.5Ⅲ to a 4cm thick hard rubber plate directly on the cement floor. Each dosimeter is dropped horizontally twice, and the two ends are dropped vertically downward once. The change of the indicated value before and after each drop should meet the requirements of 6.5.5.
7.5.6 Vibration test
The dosimeter is charged and zeroed, and the indicated value is recorded. Apply a 2g sinusoidal load to the front, back, left, right, and vertical directions at a frequency of 10 1H12~21 Hz, 22 1Iz~~33 IIz. Each vibration is 15 minutes, and the test results should meet the requirements of 6.5.6. 7.6 Environmental adaptability
7.6.1 Air tightness test
After charging and zeroing, the dose meter is placed in a dedicated vacuum container, and irradiated under standard test conditions (without a phantom), and the indication value is read. After charging and zeroing, the dose meter is placed back to the original position of the vacuum container, and the air pressure is reduced to 2uPa. It is left for 8 hours under this condition, and then irradiated under the same conditions as above (the air pressure is still maintained at 20 Pa), and then the dose meter is taken out to read the indication value. The test results should meet the requirements of Gt1. 7.6.2 Temperature test
7.6.2. 1 Commercial source irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box, and irradiated under standard test conditions. The dose is 80% of the full scale value, and the minimum indication value is recorded. After charging and zeroing, place the dosimeter in its original position. Then raise the temperature of the thermostat to 40℃+2℃, and the thermal equilibrium time is 0.5h. After keeping warm for 2h, take out the dosimeter and record the zero point, then put it back to its original position, and expose the dosimeter. The exposure time and position are alternate with those under standard test conditions. The test results should meet the requirements of 6.6.2.
7.6.2.2 High temperature test
Irradiate the dosimeter to 50~-80% of the full scale, then put the dosimeter into a thermostat at 60±2℃, and take it out after 1h, and read the indication value immediately, and then put the dosimeter back into the thermostat. After keeping warm for 4h, take it out and read the indication value immediately. The change of the indication value should meet the requirements of 6.6.2.2.
7.6.2.3 Low temperature irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the indicated value is recorded. Then the dose meter is charged and zeroed and placed back to the original position. Then the constant temperature box is cooled to 10℃ + 2℃. The thermal equilibrium time is 0.5h. After keeping warm for 2h, the dose meter is taken out and the zero point is recorded. Then it is put back to the original position and the dose meter is irradiated. The irradiation time and position are the same as those under standard test conditions. The test results should meet the requirements of 6.6.2.3. 7.6.2.4 Low temperature test
Irradiate the dose meter to 50% to 80% of the full scale. Then put the dose meter in a constant temperature box at 10C ± 2C. After 1h, take it out and read the indicated value immediately. Then put the dose meter in the constant temperature box. After 4 hours of preservation, take out the instrument and read the indication value. The change of indication value shall meet the requirements of 6.6.2.4.
7.6.3 Packaging and transportation test
The dosimeter is packaged and placed in the middle and rear of a truck, with a loading capacity of one third of the full load (if the weight of the test product cannot meet the requirements, other weights are allowed). Drive 200km~250km on a grade 1 highway (gravel road, dirt road) at a speed of 25km/h-~40km/h; or use a shock test bench to simulate the above conditions in the test space. After the test, it shall meet the requirements of 6.6.3. 7.6.4 Immersion test
The dosimeter is immersed in water to a depth of 1II1, and the test time is 1h. The test is carried out according to the method Rcl specified in 6.2 of GB/T 2423.38--1990. The test results shall meet the requirements of 6.6.1. 7.6.5 Salt spray test
The dosimeter shall be tested for 48 hours in accordance with the relevant provisions of GB/T2423.17 Test Ka. The test results shall meet the requirements of 6.6.5. 8 Inspection rules
8.1 Inspection classification and requirements.5.3 requirements. 7.5.4 Switch life
GR/T 4834 --- 2001
Put the dosimeter on the charging socket, plug and unplug and charge and discharge 2500 times, and then test according to the method of 7.4.1. 75,5 Free drop test
The dosimeter is charged to the middle scale and dropped freely from a height of 0.5Ⅲ directly onto a 4cm thick hard rubber plate on the cement floor. Each dosimeter falls horizontally twice and each end falls vertically downward once. The change of the indicated value before and after each fall should meet the requirements of 6.5.5.
7.5.6 Vibration test
The dosimeter is charged and zeroed, and the indicated value is recorded. Apply a 2g sinusoidal load to the front, back, left, right, and vertical directions at a frequency of 10 1H12~21 Hz, 22 1Iz~~33 IIz. Vibrate for 15 minutes each. The test results should meet the requirements of 6.5.6. 7.6 Environmental adaptability
7.6.1 Airtightness test
After charging and zeroing, the dose meter is placed in a dedicated vacuum container, and irradiated under standard test conditions (without a phantom), and the indicated value is read. After charging and zeroing, the dose meter is placed back to the original position of the vacuum container, and the air pressure is reduced to 2uPa. It is left for 8 hours under this condition, and then irradiated under the same conditions as above (the air pressure is still maintained at 20 Pa), and then the dose meter is taken out to read the indicated value. The test results shall meet the requirements of Gt1. 7.6.2 Temperature test
7.6.2.1 Commercial source irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the minimum indication value is recorded. Then charge and zero the dose meter and put it back to its original position. Then heat the constant temperature box to 40℃+2℃ and the thermal equilibrium time is 0.5h. After keeping warm for 2H, take out the dose meter and record the zero point. Then put it back to its original position to irradiate the dose meter. The irradiation time and position are alternate with those under standard test conditions. The test results shall meet the requirements of 6.6.2.
7.6.2.2 High temperature test
Irradiate the dose meter to 50%~-80% of the full scale, then put the dose meter into a constant temperature box at 60±2℃. After 1h of storage, take out the dose meter and read the indication value immediately. Then put the dose meter back into the constant temperature box. After keeping warm for 4 hours, take out and read the indication value immediately. The change of indication value shall meet the requirements of 6.6.2.2.
7. 6.2.3 Low temperature irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the indication value is recorded. Then charge and zero the dose meter and put it back to the original position. Then cool the constant temperature box to 10℃ + 2℃. The thermal equilibrium time is 0.5h. After keeping warm for 2 hours, take out the dose meter and record the zero point. Then put it back to the original position and irradiate the dose meter. The irradiation time and position are the same as those under standard test conditions. The test results shall meet the requirements of 6.6.2.3. 7.6.2.4 Low temperature test
Irradiate the dose meter to 50% to 80% of the full scale. Then put the dose meter in a constant temperature box at 10℃±2℃. After 1 hour, take it out and read the indication value immediately. Then put the dose meter in the constant temperature box. After 4 hours of preservation, take out the instrument and read the indication value. The change of indication value shall meet the requirements of 6.6.2.4.
7.6.3 Packaging and transportation test
The dosimeter is packaged and placed in the middle and rear of a truck, with a loading capacity of one third of the full load (if the weight of the test product cannot meet the requirements, other weights are allowed). Drive 200km~250km on a grade 1 highway (gravel road, dirt road) at a speed of 25km/h-~40km/h; or use a shock test bench to simulate the above conditions in the test space. After the test, it shall meet the requirements of 6.6.3. 7.6.4 Immersion test
The dosimeter is immersed in water to a depth of 1II1, and the test time is 1h. The test is carried out according to the method Rcl specified in 6.2 of GB/T 2423.38--1990. The test results shall meet the requirements of 6.6.1. 7.6.5 Salt spray test
The dosimeter shall be tested for 48 hours in accordance with the relevant provisions of GB/T2423.17 Test Ka. The test results shall meet the requirements of 6.6.5. 8 Inspection rules
8.1 Inspection classification and requirements.5.3 requirements. 7.5.4 Switch life
GR/T 4834 --- 2001
Put the dosimeter on the charging socket, plug and unplug and charge and discharge 2500 times, and then test according to the method of 7.4.1. 75,5 Free drop test
The dosimeter is charged to the middle scale and dropped freely from a height of 0.5Ⅲ directly onto a 4cm thick hard rubber plate on the cement floor. Each dosimeter falls horizontally twice and each end falls vertically downward once. The change of the indicated value before and after each fall should meet the requirements of 6.5.5.
7.5.6 Vibration test
The dosimeter is charged and zeroed, and the indicated value is recorded. Apply a 2g sinusoidal load to the front, back, left, right, and vertical directions at a frequency of 10 1H12~21 Hz, 22 1Iz~~33 IIz. Vibrate for 15 minutes each. The test results should meet the requirements of 6.5.6. 7.6 Environmental adaptability
7.6.1 Airtightness test
After charging and zeroing, the dose meter is placed in a dedicated vacuum container, and irradiated under standard test conditions (without a phantom), and the indicated value is read. After charging and zeroing, the dose meter is placed back to the original position of the vacuum container, and the air pressure is reduced to 2uPa. It is left for 8 hours under this condition, and then irradiated under the same conditions as above (the air pressure is still maintained at 20 Pa), and then the dose meter is taken out to read the indicated value. The test results shall meet the requirements of Gt1. 7.6.2 Temperature test
7.6.2.1 Commercial source irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the minimum indication value is recorded. Then charge and zero the dose meter and put it back to its original position. Then heat the constant temperature box to 40℃+2℃ and the thermal equilibrium time is 0.5h. After keeping warm for 2H, take out the dose meter and record the zero point. Then put it back to its original position to irradiate the dose meter. The irradiation time and position are alternate with those under standard test conditions. The test results shall meet the requirements of 6.6.2.
7.6.2.2 High temperature test
Irradiate the dose meter to 50%~-80% of the full scale, then put the dose meter into a constant temperature box at 60±2℃. After 1h of storage, take out the dose meter and read the indication value immediately. Then put the dose meter back into the constant temperature box. After keeping warm for 4 hours, take out and read the indication value immediately. The change of indication value shall meet the requirements of 6.6.2.2.
7. 6.2.3 Low temperature irradiation
After charging and zeroing, the dose meter is placed in a constant temperature box and irradiated under standard test conditions. The dose is 80% of the full scale value and the indication value is recorded. Then charge and zero the dose meter and put it back to the original position. Then cool the constant temperature box to 10℃ + 2℃. The thermal equilibrium time is 0.5h. After keeping warm for 2 hours, take out the dose meter and record the zero point. Then put it back to the original position and irradiate the dose meter. The irradiation time and position are the same as those under standard test conditions. The test results shall meet the requirements of 6.6.2.3. 7.6.2.4 Low temperature test
Irradiate the dose meter to 50% to 80% of the full scale. Then put the dose meter in a constant temperature box at 10℃±2℃. After 1 hour, take it out and read the indication value immediately. Then put the dose meter in the constant temperature box. After 4 hours of preservation, take out the instrument and read the indication value. The change of indication value shall meet the requirements of 6.6.2.4.
7.6.3 Packaging and transportation test
The dosimeter is packaged and placed in the middle and rear of a truck, with a loading capacity of one third of the full load (if the weight of the test product cannot meet the requirements, other weights are allowed). Drive 200km~250km on a grade 1 highway (gravel road, dirt road) at a speed of 25km/h-~40km/h; or use a shock test bench to simulate the above conditions in the test space. After the test, it shall meet the requirements of 6.6.3. 7.6.4 Immersion test wwW.bzxz.Net
The dosimeter is immersed in water to a depth of 1II1, and the test time is 1h. The test is carried out according to the method Rcl specified in 6.2 of GB/T 2423.38--1990. The test results shall meet the requirements of 6.6.1. 7.6.5 Salt spray test
The dosimeter shall be tested for 48 hours in accordance with the relevant provisions of GB/T2423.17 Test Ka. The test results shall meet the requirements of 6.6.5. 8 Inspection rules
8.1 Inspection classification and requirements.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.