Verification Regulation of Standard Incandescent Lamp for Total Luminous Flux
Some standard content:
National Metrology Verification Regulation of the People's Republic of China H.247
Standard Incandescent Lamp TorTotal-LuminousFlux
2008-0325 Issued
Implementation on 2008-.09.25
Issued by the General Administration of Quality Supervision, Inspection and Quarantine
JJG 247—2008
Verification Regulation of Standard Incandescent Lamp for Total Luminous FluxJJG247—2008
Replaces JJG247-
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 25, 2008, and came into effect on September 25, 2008.
Responsible unit: National Optical Metrology Technical Committee Drafting unit: China National Institute of Metrology This regulation entrusts the National Optical Metrology Technical Committee to be responsible for the interpretation of this regulation Drafting person of this regulation:
JJG247—2008
Liu Hui (China National Institute of Metrology)
Yang Chenzhu (China National Institute of Metrology)
Participating drafter of this regulation:
Xiao Wenbin (China National Institute of Metrology) 1
Scope·
References·
Overview·
4 Metrological performance requirements
4.1 Stability of total luminous flux standard lamp
4.2 Rating of total luminous flux standard lamp
JJG 247—2008
4.3 Composition of total luminous flux standard and expanded uncertainty of measurement value 5 General technical requirements··
5.1 Appearance..
5.2 Identification·
Control of measuring instrument
Verification conditions.…
Verification items·
Verification methods…
Handling of verification results·
Verification cycle
Appendix AwwW.bzxz.Net
Appendix B
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Appendix Record 1
Photoelectric parameters of domestic total luminous flux standard incandescent lampsB1)T type standard lamp stability experimental method
Calculation method of measurement system instability ductility correction factorCalculation method of nonlinear correction factor
Measurement method of spherical photometer absorption correction factorCalculation method of V(λ) mismatch correction
Recommended formula of integrating sphere coating
Uncertainty analysis example
Total luminous flux standard incandescent lamp verification certificate and verification result notice (inside page) format (1)
(2)
(4)
1 Scope
JJG 247—2008
Total luminous flux standard incandescent lamp verification procedure
This procedure applies to the verification of working benchmark and first and second level total luminous flux standard incandescent lamps (hereinafter referred to as luminous flux standard lamps or standard lamps). In the evaluation of standard lamp types, the requirements for metrological performance can be referred to. 2 References
GB15039-1994 "Luminous Intensity, Total Luminous Flux Standard Bulb" GB15040-1994 "Ordinary Photometric Standard Bulb" JJG213-2003 "Verification Procedure for Distribution (Color) Temperature Standard Lamps" JJF1002-1998 "Rules for the Preparation of National Metrology Verification Procedures" JJF1059-1999 "Evaluation and Expression of Uncertainty in Measurement" When using this procedure, attention should be paid to using the current valid versions of the above referenced documents. 3 Overview
The total luminous flux standard lamp is a measuring instrument used to maintain and transmit the total luminous flux unit-lumen (lm) value. It is a standard measuring instrument for measuring the total luminous flux of a light source using the relative method. It is an incandescent lamp with stable luminous characteristics made according to specific requirements. 4. Metrological performance requirements
4.1 Stability of total luminous flux standard lamp
The DC-powered standard lamp submitted for inspection for the first time must be aging in accordance with relevant regulations. The stability after aging should be such that the voltage change at the lamp end is less than 0.05% (for vacuum lamps) and 0.07% (for gas-filled lamps) when ignited for 8 hours under the reference current (see Appendix B for the experimental method). For AC-powered standard lamps, their stability should meet the requirements of GB15040-1994. 4.2 Rating of total luminous flux standard lamps
The standard lamp submitted for inspection for the first time will not be rated. When re-inspected after one year, it shall be rated according to the annual change rate of the lamp and the level of the previous standard lamp used during calibration in accordance with the provisions of Table 1. Table: Regulations for grading standard lamps
Level of standard lamp being tested
Working base
Where: Φ-
Total luminous flux value during initial inspection;
Total luminous flux value during re-inspection.
Superior standard level
Benchmark or sub-benchmark
Not lower than working standard
Not lower than first level
I @—
X 100%
Annual rate of change of luminous flux Q
Not more than 0.6%
Not more than 0.8%
Not more than 1.0%
JIG 247—2008
4.3 Composition and expanded uncertainty of total luminous flux standard value The total luminous flux working standard is composed of no less than 5 working reference lamps, and the first and second level standards are composed of no less than 100 first level standard lamps and second level standard lamps respectively. The expanded uncertainty of the value of each level of total luminous flux standard is shown in Table 2. Table 2 Expanded uncertainty of standard values of total luminous flux at all levels Standard level
Working benchmark
Expanded uncertainty (-2)
Consistency within lamp group "
* Consistency is characterized by the absolute value of the relative deviation of the luminous flux disk constant of a single lamp to the average luminous flux constant of the lamp group. 5 General technical requirements
5.1 Appearance
The glass bulb of the standard push lamp should be bright and transparent, without obvious defects such as fogging, alkali, streaks, bubbles, sand particles, mold rings and scratches. The welding and support of the filament should be reliable without obvious sagging. The glass bulb and the lamp holder should be firmly fixed, without obvious tilting of the head, tilting of the core and other defects that affect the normal use of the lamp. 5.2 Marking
The model and number of the lamp should be clearly and firmly marked on the standard lamp, which can be marked near the lamp holder or at the lamp holder. 6 Measuring instrument control
Measuring instrument control includes initial calibration, subsequent calibration and inspection in use. 6.1 Calibration conditions
6.1.1 Calibration equipment
6.1.1.1 Standard lamp group
Used to calibrate the upper standard of the standard lamp value to be measured. 6.1.1.2 Spherical photometer
It consists of an integrating sphere and a photometric system (Figure 1). Figure 1 Schematic diagram of a spherical photometer
1- Integrating sphere sphere, 2- Self-incandescent lamp; 3- Screen; 4- Integrating sphere window glass * 5- Variable light balance 6- Shutter 7- V (>) positive filter: 8- Photoelectric receiving medium; - Photoelectric signal conversion display instrument a) Integrating sphere
JJG 247 --2008
The integrating sphere is a hollow spherical shell. The spherical shell should be made of materials that are not easily deformed and are not easily affected by the environment. The surface inside the spherical shell should be a complete spherical surface, without cracks, unevenness or defects. The inner wall of the sphere and the objects inside the sphere, such as the screen, wires, and lamp holders, should be evenly coated with a layer of white diffuse reflection paint. When the paint is obviously discolored, peeled off, or contaminated, it should be re-sprayed. When calibrating standard lamps below 150W (inclusive), the diameter of the integrating sphere used shall not be less than 1m. When calibrating standard lamps of (200-500)W: the diameter of the integrating sphere shall not be less than 1.5m; when calibrating a 1000W standard lamp, the diameter of the integrating sphere used shall not be less than 2m. The surface area and number of objects related to measurement placed in the sphere should be minimized.
The size of the screen set in the sphere should be enough to cover the window so that it is not directly illuminated by the light of the bulb (including scattered light and reflected light on the slope shell), and should not be too large. The center of the screen is on the line connecting the center of the sphere and the center of the window, 1/2 to 1/3 of the radius of the sphere from the center of the sphere, and the screen surface is perpendicular to the connecting line. A small circular hole is used at the equator line 1 of the integrating sphere, with a diameter of (20 to 40) mm. A piece of double-sided frosted glass or frosted milk glass with good diffuse transmission is placed on the circular hole, and its side facing the inside of the sphere should be consistent with the inner surface of the sphere, as a light measuring window.
In order to adjust the illumination level on the photometric receiver, a variable iris is placed near the frosted glass of the window (for photometric mouse measurement systems that can adapt to large illumination changes, variable iris can be omitted). In order to facilitate the adjustment of the point of the photometric system and avoid the influence of long-term exposure of the photoelectric receiver, a shutter can be installed in front of the receiver.
b) The photometric system
is composed of a photoelectric receiver, a V (1) correction filter, and a photoelectric signal processing and display instrument. The photoelectric receiver can be a photoelectric device such as a photocell or a photodiode that is sensitive to visible radiation and has good stability. The V (1) filter is used to correct the spectral characteristics of the entire system. The photoelectric signal generated by the receiver can be directly measured by an electric measuring instrument, or it can be measured by a digital voltmeter or a digital frequency meter through an IU converter or an IF converter. 6.1.2 Power supply and electric measuring instrument
6.1.2.1 Power supply
The maximum output voltage and output current of the DC power supply should be no less than 1.2 times the working voltage and working current of the bulb respectively. The output power of the AC power supply should be no less than 1.5 times the power consumption of the bulb. The output voltage of both power supplies can be continuously adjusted from 0VⅡ. The requirements for power supply stability are shown in Table 3. Table 3 Requirements for power supply stability and electrical measuring instrument grades Standard Light level
T is used as the benchmark. The voltage change within 10 minutes of DC regulated voltage or regulated current power supply is not more than 0.01% as level
. The voltage change within 10 minutes of DC regulated voltage or regulated current power supply is not more than 0.02%. The voltage change within 10 minutes of DC or AC regulated voltage (regulated current) power supply is not more than 0.1%. 6.1.2.2 Electrical measuring instruments
Electric measuring instruments
shall not be less than (1.01 level
shall not be less than 0.02 level
shall not be less than 0.1 Level
digital voltmeter (DC potentiometer and standard battery of the same level as digital voltmeter can also be used) standard resistor, ammeter or digital power meter. Supply power according to the circuit diagram shown in Figure 2 or Figure 3 to measure current and voltage. 3
For the requirements of the level of electrical measuring instruments, see Table 3.
Adjustable DC
Regulated power supply
6.1.3 Environment
JJG 247--2008
Standard resistor
Voltage meter
DC power supply and electrical measurement circuit diagram
Figure 3 AC power supply and electrical measurement circuit diagram
Voltage measurement
Heavy instrument
Digital power meter
The temperature in the laboratory should be within the range of (23-5)℃. The temperature change during the measurement process shall not exceed 3℃, and the humidity shall be less than 80%RH.
6.2 Verification items||tt ||For the verification items of the total luminous flux standard incandescent lamp, see Table 4. Table 4 Verification items of the total luminous flux standard fluorescent lamp Verification items
Appearance inspection
Stability
Distribution temperature"
Photoelectric parameters
Annual change rate of total luminous flux
Consistency of lamp group
First verification
Subsequent verification
Note: "+" indicates items that need to be verified, and "-" indicates items that are not disclosed. To be verified: * indicates AC power supply This item is not required for the electric standard lamp. A
In-use inspection
6.3 Verification method
6.3.1 Appearance inspection
JJG247—2008
Use visual inspection according to the requirements of 5.1. If the appearance inspection fails, the verification shall be terminated. When taking, placing, inspecting and using the lamp, it is forbidden to directly touch the glass shell. If there is any stain on the glass shell, it shall be removed in time.
6.3.2 Calibration of distribution temperature and determination of electrical parameters After the DC-powered standard lamps sent for inspection have passed the stability test, their distribution temperature should be calibrated, that is, the current and voltage of the bulb at the specified distribution temperature should be calibrated. The calibration method can be found in JJ 213-2003 "Procedure for Calibration of Standard Lamps with Distributed (Color) Temperature". However, the voltage at the lamp terminals under the calibrated current should still be measured in the subsequent cycle as a criterion for the stability of the standard lamp. When the measured voltage at the good end changes by more than 2% compared with the voltage at the initial inspection, the distribution temperature should be re-calibrated. Note: Generally, the net light intensity and total luminous flux of incandescent lamps are the same. 6.3.3 Calibration of total luminous flux 6.3.3.1 When measuring the inductive flux, the DC current value is the same as the lamp terminal voltage; the current is changed. The voltage of the lamp to be measured should be the same as the standard lamp. The current of the lamp should be equal to the difference in temperature. The voltage of the lamp to be measured should be the same as the standard lamp. When the lamp voltage is measured, the auxiliary lamp should not be less than 5, and the upper standard lamp should not be less than 3. Before the measurement, use a lamp and the wall of the sphere to remove moisture and pre-illumination to receive the light intensity of (30~60). 6.3.3.4 When the lamp is installed in the circuit of the integrating sphere, the voltage added to the lamp should be lower than the specified current or value. The vacuum lamp is pre-baked before the electrical parameters are formally measured. The measured voltage should be less than 10% of the measured voltage. The general incandescent lamp that is close to the test lamp in terms of distribution temperature, lamp power and light distribution should be ignited in the spherical meter. The pre-illumination time is determined according to experience. Generally, the glass bulb is at the bottom and the light center is negative to the center of the sphere. Connect the power line, and then slowly increase to 1/min within 20 (5) min; 30) s. After the light emission is stable, the pre-ignition voltage of the lamp is slowly reduced to the nominal voltage of the bulb within (7) s. 6.3.3.5 When measuring, the reading of each bulb shall not be less than 3 times, and the half-average shall be taken as the measured value. If the relative deviation of a single reading from the average value is greater than 0. % (for the first and second standard lamps), the number of measurements should be appropriately increased.
number, and then re-average the remaining readings as the reference lamp. 6.3.3.6 If the stability of the measurement system needs to be monitored, 1~-2 bulbs with stable light emission can be selected as reference lamps. The reference lamps should be measured at the beginning, middle and end of the measurement. The unstable correction factor of the measurement system is determined based on the changes in the measured values of the reference lamps, and the measured values of each bulb are corrected. Both the standard lamp and the lamp under test can be selected as reference lamps.
6.3.3.7 During each calibration, the standard lamps should be distributed as evenly as possible among the lamps under test. Taking two standard lamps as an example, the measurement sequence can be arranged as follows: reference lamp, standard 1, measured 1, measured 2, measured 3, reference lamp, standard 2, measured 1, measured 5, standard 3, reference lamp, 5
6.3.3.8 Data processing
a) Correction factor
JJG 247-—2008
① Unstable correction 1 According to the change of the responsiveness of the reference lamp monitoring photometric measurement system, make unstable correction for the measured values of the standard lamp and the measured lamp: the correction method is shown in Appendix C. ② Nonlinear correction When the measured values of the standard lamp and the measured lamp differ greatly, the nonlinear correction factor of the spherical photometer photometric measurement system should be calculated. The correction method is shown in Appendix D. Absorption correction When the external dimensions of the standard lamp and the measured lamp differ greatly or the glass shell conditions are different, their absorption correction factors in the spherical photometer should be measured. The correction method is shown in Appendix E. (④V(^) mismatch correction When the relative spectral power distribution of the standard lamp and the lamp under test is very different, the V() mismatch correction factor of the lamp under test on the standard lamp in this spherical photometer should be calculated. The correction method is shown in Appendix F. If the influence of each single correction factor on the luminous flux of the lamp under test is less than 0.1%, no correction is required. Assume that the measured value of the standard lamp after correction is n: (i=1.2,:n, n is the number of standard lamps used.) The measured value of the lamp under test is m(j-1,2, q: 4 is the number of lamps to be tested). The total luminous flux of the standard lamp is @s, and the total luminous flux of the lamp to be tested is.
b) Calculate the luminous flux constant Ci of a single standard lamp: C
Average value of luminous flux constant:
( = 1.2,.-.,n)
Calculate the sum of the average value and the deviation of the luminous flux constant of a single standard lamp: a,
If the relative deviation of the luminous flux constant of a standard lamp from the average value exceeds the provisions of Table 5, the lamp must be re-measured: or a new standard lamp is selected to participate in the measurement: the excess data is discarded, and the sum is recalculated and then judged. 8 reflects the consistency between the lamps in the lamp group. When checking in use, it is necessary to do a lamp group consistency test. If it exceeds the provisions of Table 5 and is still exceeded after two repeated tests, it should be immediately re-determined with the total luminous flux standard lamp of the previous level, and then the consistency of the lamp group should be examined. Table 5 Relative deviation of the luminous flux constant of standard lamps of various levels from the average value Standard level
Sub-standard
Working standard
First-level standard
The absolute value of the relative deviation of the luminous flux constant of a single lamp from the average value 0.2%
e) Calculate the total luminous flux value of the lamp under test:
, - mt,C
(Gi = 1.2,..,n)
d) Each lamp to be inspected must be measured at least twice, and the relative deviation of the values calibrated twice for the lamp to be inspected shall comply with the provisions of Table 6. If it exceeds the provisions of Table 6, it must be re-measured. If the re-measurement result still does not meet the requirements, 6
will be graded or not graded according to the actual situation.
JJG 247--2008
Table 6 Permissible value of relative deviation of values of two calibrations for standard lamps to be inspected Standard lamp level to be inspected
Working standard
Absolute value of relative deviation of values of two calibrations 0.2%
The number of significant digits of current, voltage and total luminous flux values given in the verification results of standard lamps of various levels is shown in Table 7 Table 7 Number of significant digits of photoelectric parameters in the verification results of standard lamps of various levels Standard lamp level
Working standard
6.4 Handling of verification results
Significant digits
Luminous flux
For lamps to be inspected for the first time, if they meet the minimum requirements of 5.1 and Table 6 except for the annual change rate, a verification certificate may be issued, but no classification shall be given, and only qualified or unqualified shall be indicated. Re-inspection shall be carried out after accumulative use of 100h or 1 year, and the classification shall be given again. Between two tests, the actual burning time of the standard lamp shall not be less than 10 hours. A test certificate shall be issued to the graded standard lamp after it passes the test. If the test result does not meet the requirements of the original grade, it can be re-graded according to the actual requirements. If it does not meet the requirements of the second-level standard in Table 1, a test result notice shall be issued and the unqualified items shall be noted. 6.5 Test cycle
The basic working period is 3 years, and the first and second-level standards are 1 year. If the cumulative use time reaches 100 hours, it should be sent for inspection even if it does not meet the test cycle.
Appendix A
JJG247-2008
Photoelectric parameters of domestic total luminous flux standard incandescent lamps Since the photoelectric parameters of the total luminous flux standard lamps produced in my country are shown in Tables A.1 and A.2. Table A.1 BDT type total luminous flux standard lamp electrical parameters Type
BDP-15
BDP-40
BDP-100
BDF150
3DP-200
BDP-30Q
BDP-500
BDP1000
SSNONNIES
Current/A||tt| |Distribution temperature/K
(specified value)
reference value)
Table A, 2BDP type
Power/
Regulated value》
(nominal value)
Luminous flux standard lamp
reference value
METROL
Luminous flux/lm
(reference value)
Total luminous flux/lm
(reference value)
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