GB/T 19258.1-2022Ultraviolet radiation sources for germicidal purpose—Part 1: Low pressure mercury vapor discharge lamp (English PDF)

3.1 Ultraviolet germicidal lamp

A low-pressure mercury vapor discharge lamp made of quartz glass or other ultraviolet-transmitting glass, producing ultraviolet radiation mainly with a wavelength of 253.7 nm by discharge.

3.2 Ozone concentration

The mass of ozone produced per unit volume when the lamp is ignited under specified conditions.

3.3 Ozone output efficacy

The ratio of the amount of ozone produced per unit time to the power consumed by the lamp when the lamp is ignited under specified conditions.

3.4 Nominal value

The approximate value used to name or identify the lamp.

3.5 Rated value

The numerical value of a certain characteristic of the lamp under specified conditions.

3.6 Initial readings

The starting characteristics of the lamp measured before aging and the ultraviolet radiation, electrical characteristics and ozone characteristics measured after aging for 100 h.

4.1 Classification and marking

According to the shape, lamps can be divided into three categories: double-capped lamps (indicated by "S"), single-capped lamps (indicated by "D") and self-ballasted lamps (indicated by "Z"); according to whether it contains ozone, it can be divided into two types: ozone (indicated by "Y") and ozone-free (indicated by "W").

4.2 Model naming method

The model naming method of lamps is as follows:

Example 1: ZW15S26W indicates a 15 W double-capped ozone-free ultraviolet germicidal lamp with a tube diameter of 26 mm.

5.1 General requirements

The design, structure and performance of lamps shall ensure reliable performance in normal use and not cause danger to users and the surrounding environment. Generally, the qualification is checked by conducting all the specified tests.

5.3 Glass tube

The glass tube of lamps shall be transparent and clean and shall not have defects that affect the transmission of ultraviolet rays.

5.4 Lamp holder

The finished lamp shall be equipped with a lamp cap that meets the corresponding light source performance standards.

The types and dimensions of pin, screw and bayonet lamp caps shall comply with the provisions of GB/T 1406.2, GB/T 1406.1 and GB/T 1406.5, respectively. Lamp caps of other specifications shall comply with the provisions of GB/T 2797.

5.5 Anti-ultraviolet radiation

The insulating materials used for lamp caps and lamp housings shall be resistant to ultraviolet radiation, anti-ultraviolet aging and embrittlement. After completing the test in 6.9, the sample shall not have any changes that weaken its safety, the anti-electric shock performance of the insulating material shall not be reduced, the lamp cap and the lamp cap pins shall not be loose, and the insulating material shall not be cracked, bulged or shrunken.

5.6 Lamp dimensions

The dimensions of double-capped lamps, single-capped lamps and self-ballasted lamps shall comply with the provisions of the corresponding model lamps in GB/T 10682, GB/T 17262 and GB/T 17263, respectively.

5.7 Starting characteristics

Lamps shall have good starting characteristics, and the starting characteristics of double-capped lamps, single-capped lamps and self-ballasted lamps shall comply with the provisions of the corresponding power lamps in GB/T 10682, GB/T 17262 and GB/T 17263, respectively.

5.8 Initial electrical parameters

The initial voltage value of double-capped lamps and single-capped lamps shall comply with the provisions of the corresponding power lamps in GB/T 10682 and GB/T 17262, respectively.

5.9 Ultraviolet radiation efficiency

The initial value of the ultraviolet radiation efficiency of double-capped lamps, single-capped lamps and self-ballasted lamps shall not be lower than the value specified in Table 1.

5.10 Ultraviolet radiation flux

The ultraviolet radiation flux can be nominally stated by the manufacturer and the seller, and the actual measured value shall not be less than 90 % of the nominal value.

5.11 Ultraviolet radiation luminance

The initial value of the ultraviolet radiation luminance of double-capped lamps and single-capped lamps shall not be less than 93 % of the values specified in Table 2 and Table 3, respectively.

5.12 Ozone concentration/ozone output efficacy

Ozone-free lamps are evaluated by ozone concentration, and ozone lamps are evaluated by initial ozone output efficacy.

The ozone concentration of ozone-free lamps is expressed as the average mass concentration per unit time, and the average maximum allowable concentration for 1 h is 0.1 mg/m³.

6.1 Glass tube

Inspect by visual method.

6.2 Lamp cap

Inspect by corresponding gauge.

6.3 Anti-ultraviolet radiation

For the anti-ultraviolet aging of insulating materials, after testing according to 6.9, use visual method and special gauges for inspection.

6.4 Lamp dimensions

Use general measuring tools or special gauges with an accuracy of not less than 0.05 mm for inspection.

6.5 Starting characteristics and initial electrical parameters

Single-capped lamps are tested according to the method specified in GB/T 17262.

Self-ballasted lamps are tested according to the method specified in GB/T 17263.

Double-capped lamps are tested according to the method specified in GB/T 10682.

6.6 Ultraviolet radiation efficiency, ultraviolet radiation flux

Test according to the method specified in Annex A.

6.7 Ultraviolet radiation luminance

Test according to the method specified in Annex B.

6.8 Ozone concentration/ozone output efficacy

Test according to the method specified in Annex C.

For ultraviolet lamps with ozone output used in dynamic airflow environments, refer to Annex D for testing.

7.1 Inspection classification

Inspection is divided into factory-exit inspection and type inspection.

7.2 Factory-exit inspection

The samples for factory-exit inspection shall be uniformly taken from the same type of lamps produced daily (from each batch). Factory-exit inspection shall be carried out in accordance with GB/T 2828.1, and its inspection items, sampling plan, inspection level and acceptance quality level shall comply with the provisions of Table 4.

7.3 Type inspection

Type inspection shall be carried out at least once a year. The samples for type inspection shall be uniformly taken from the lamps that have passed the factory-exit inspection.

8.1 Marking

The marking content on lamps shall comply with the requirements of Table 6 and shall be clear and firm.

8.2 Packaging

The minimum sales package shall contain a product certificate. If the minimum sales package contains multiple lamps, the number of lamps shall be indicated.

8.3 Storage

Lamps shall be stored in a ventilated room with a relative humidity not exceeding 85 %, and there shall be no corrosive gases in the air.

8.4 Transportation

Lamps shall be protected from rain, snow and strong mechanical vibration during transportation. […]