Select the lamp and wavelength
Choose UVA-340/340 nm or UVB-313/313 nm on the controller. Set irradiance according to the governing procedure.
Tower Type UV Aging Test Chamber
A dual-sided tower-type UV weathering chamber designed for controlled fluorescent UV exposure, condensation and water-spray cycles.
Model
DX-H302-A
External dimensions
1300 × 500 × 1470 mm
Lamp system
8 × 40 W UVA-340
Specimen capacity
Up to 48 specimens
UVB-313 lamps, special specimen holders and customized test configurations are available after method review.
Product Details
0.35–1.20W/m²/nm @ 340 nm
0.30–1.15W/m²/nm @ 313 nm
0.38 m²Total effective exposure area
50 ± 3 mmLamp axis to specimen plane
CSV exportConfigurable data interval
Why the tower architecture matters
A fixed exposure geometry built for repeatable flat-specimen testing.
The chamber positions removable specimen frames on two inclined exposure sides. The mounting angle is fixed by the tower structure, while the target specimen plane is maintained 50 ± 3 mm from the lamp center axis.
Choose this architecture when the laboratory primarily tests standardized flat panels and needs high specimen throughput in a compact footprint. Large finished products and irregular three-dimensional parts require a fixture and exposure-geometry review before quotation.
Two exposure sidesFour lamps and two irradiance sensors are arranged on each side.
Four removable framesEach frame provides 12 specimen positions for a total capacity of up to 48.
Fixed inclined mountingThe specimen angle is determined by the chamber structure and is not adjustable.
Conditional 3D capabilityDedicated holders or shelf arrangements require engineering review and can reduce standard capacity.
IMAGE 02 · Both lids open前后双向翻盖同时打开，完整显示两侧灯管区、四个样品架框以及整体斜塔结构；必须停机断电后拍摄。tower-chamber-open-architecture.webp · ALT: Open tower UV chamber showing dual lamp and specimen-frame layout
IMAGE 03 · Removable specimen frame单个样品架整体取出，装入75×150 mm样板；同时展示卡槽、弹簧圈/卡环和空位封堵板。uv-specimen-frame-12-positions.webp · ALT: Removable 12-position specimen frame for UV weathering tests
Verified specification framework
Compare the configuration using values that affect the test—not generic claims.
The following values are based on the current confirmed tower-type configuration. Final lamp supplier, electrical service, temperature program and document scope must be stated in the order specification.
| Product architecture | Dual-sided tower type with fixed inclined specimen planes and front/rear flip-open lids |
|---|---|
| External dimensions | 1300 × 500 × 1470 mm |
| Working zone | 1140 (W) × 400 (D) × 390 (H) mm |
| Approximate weight | 120 kg |
| Lamp system | 8 × 40 W T12 fluorescent UV lamps; four lamps on each exposure side |
| Standard lamp | UVA-340; UVB-313/UVB-313EL available according to the confirmed method |
| Lamp supplier | Philips or Atlas options; exact brand and lamp designation confirmed in the quotation and order documents |
| Lamp length | Approximately 1200–1220 mm; final measurement basis confirmed by the supplied lamp model |
| Lamp center spacing | 65–70 mm |
| Lamp axis to specimen surface | 50 ± 3 mm at the defined target specimen plane |
| UVA-340 irradiance setting | 0.35–1.20 W/m²/nm at 340 nm |
| UVB-313 irradiance setting | 0.30–1.15 W/m²/nm at 313 nm |
| Display resolution | 0.01 W/m²/nm |
| Control tolerance | ±0.01 W/m²/nm under specified stable operating conditions; verify against the final FAT method |
| Irradiance sensors | 4 total; two at the specimen plane on each exposure side |
| Irradiance uniformity | ≤4% factory-measured across the effective exposure area; measurement layout and report scope confirmed at order |
| Effective exposure area | 0.38 m² total across the front and rear exposure sides |
| Standard specimen capacity | 48 × 75 × 150 mm flat specimens; four frames × 12 positions |
| Alternative flat specimen size | Up to 75 × 300 mm, up to 48 positions with the corresponding holder arrangement |
| Specimen thickness | Typically 1–3 mm; generally not more than 6 mm |
| Moisture functions | Condensation and water spray |
| Data recording | Default one record per second; configurable storage interval from 1 second to 60 minutes; CSV export |
| Third-party documentation | Third-party metrology documentation supplied at no additional charge; measured items and report scope stated in the order |
Load and angle statement: no verified maximum specimen-load value or exact mounting-angle value is published. Irregular-part weight, fixture design and target exposure surface are reviewed case by case.
Closed-loop irradiance control
Control the required wavelength and document when lamp output can no longer hold the setpoint.
The operator selects the installed lamp family and the corresponding control wavelength before entering the method-specific irradiance setpoint. Four sensors monitor irradiance at the specimen planes, and the controller compensates for gradual lamp-output loss within the available control range.
340 nmControl wavelength for UVA-340
313 nmControl wavelength for UVB-313
4 sensorsTwo per exposure side
≤4%Factory-measured uniformity
Recalibrate after a lamp-type change
Irradiance recalibration is mandatory whenever the lamp family or control wavelength changes.
Use performance-based replacement
If output reaches its upper control limit and still cannot maintain the setpoint, the system generates an alarm and prompts inspection or lamp replacement.
IMAGE 04 · Four-sensor location proof拍摄样品架平面及传感器：一张全景标出前后各2个位置，再补一张传感器近景。不要虚构品牌标识。uv-irradiance-sensors-specimen-plane.webp · ALT: Irradiance sensors mounted at the UV specimen exposure plane
IMAGE 05 · Controller and trend record真实控制器界面应同时显示灯型、340/313 nm、设定值、测量值、黑板温度、运行阶段和趋势曲线；隐藏客户名称。uv-controller-irradiance-trend.webp · ALT: UV chamber controller showing irradiance setpoint and measured trend
Specimen capacity and mounting
Separate holder capacity from the effective irradiated area.
The four removable frames provide up to 48 positions, while the combined effective exposure area is 0.38 m². Holder capacity does not mean that every square millimeter of a longer specimen lies within the calibrated effective exposure area.
| Specimen format | Capacity | Mounting approach | Engineering condition |
|---|---|---|---|
| 75 × 150 mm flat panel | Up to 48 | Frame slots with retaining rings/clips | Standard flat-specimen workflow |
| 75 × 300 mm flat panel | Up to 48 | Corresponding holder arrangement | Confirm target exposed area and supplied holder |
| 1–3 mm thickness | According to holder | Direct frame mounting | Typical range |
| Up to 6 mm thickness | May vary | Check clip and sealing fit | Confirm before quotation |
| Irregular or 3D part | Application-specific | Custom fixture or shelf arrangement | Geometry, weight and method review required |
Important: for irregular parts, only the defined target surface can be positioned at the nominal lamp distance. Curved surfaces do not remain uniformly 50 ± 3 mm from the lamp axis, and a custom fixture can change capacity, sealing and method suitability.
Lamp management
Replace lamps according to measured performance—not operating hours alone.
The controller records the cumulative operating time of the complete eight-lamp group. The 1,200–1,600-hour interval is a maintenance inspection window; it is not presented as an automatic end-of-life claim.
- Track group runtimeThe eight lamps share one cumulative operating-time record.
- Receive a maintenance reminderThe controller provides a time-based remaining-life estimate and scheduled reminder.
- Check measured irradianceEvaluate whether closed-loop control still maintains the required setpoint.
- Replace when requiredA system-level audible and visual alarm prompts inspection when output cannot be maintained.
- Reset the service recordAfter replacement, manually reset the counter and begin a new maintenance cycle.
Matched-set replacement
Replacing all eight lamps together is recommended when they have reached a similar operating age.
Individual replacement
A single lamp may be replaced after an isolated early failure, followed by mandatory recalibration and performance verification.
System-level diagnosis
The alarm does not identify a lamp or exposure side. Stop, isolate and cool the chamber before lamp-by-lamp inspection.
Supply policy: spare lamps are purchased separately and are not included in the standard shipment. No fixed routine cleaning interval is claimed; inspect lamp surfaces during scheduled maintenance and follow the supplied lamp instructions if contamination is found.
UV, condensation and water spray
Define the exposure sequence before selecting the program.
The tower-type chamber supports fluorescent UV exposure, condensation and water spray. The exact lamp, irradiance, stage temperature, duration and wetting sequence must come from the material method or the laboratory’s validated procedure.
UV stageConfirm lamp family, wavelength, irradiance and panel-temperature requirements.
Condensation stageConfirm duration, temperature, water supply and specimen sealing requirements.
Water-spray stageUse only when the procedure requires direct wetting, cooling or erosion effects.
Formal test startAllow approximately 30 minutes for warm-up and begin formal exposure only after irradiance and black-panel temperature are stable.
IMAGE 06 · Moisture-system evidence组合拍摄喷淋喷嘴、供水/水箱、冷凝结构和排水接口。用箭头标注水流方向，但不要写尚未确认的流量、压力或温度数值。uv-condensation-water-spray-system.webp · ALT: Condensation and water spray system inside a tower UV aging chamber
Method-oriented configuration
A standard number starts the review; it does not replace the complete exposure procedure.
ASTM G154 describes operation of fluorescent UV apparatus but does not select the best exposure condition for every material. ISO 4892-3:2024 addresses fluorescent UV exposure of plastics, while coatings and other materials use their applicable material methods.
ASTM G154
Confirm the exact lamp, irradiance, exposure temperature, moisture sequence and reporting conditions.
ISO 4892-3:2024
Review fluorescent UV radiation, heat and water exposure requirements for plastic specimens.
Material-specific methods
ASTM D4329, ASTM D4587, ISO 16474-3 or a customer procedure may define the specimen, cycle and evaluation method.
Method boundary: do not state that one chamber “complies with all UV standards.” Final suitability depends on the edition, lamp spectrum, controlled wavelength, setpoint, temperature, wetting cycle, specimen geometry and evaluation procedure. Accelerated test hours cannot be converted into a universal number of outdoor years.
Calibration and acceptance evidence
Make the control claim traceable at the specimen plane.
Irradiance calibration is required every 500 operating hours and after changing lamp type. A traceable UV radiometer with the appropriate 340 nm or 313 nm probe is used for point-by-point verification.
Lamp/configuration check
Verify lamp type, supplier, quantity and controller wavelength.
Verify lamp type, supplier, quantity and controller wavelength.
Multi-point irradiance check
Record specimen-plane readings and calculate uniformity using the agreed layout.
Record specimen-plane readings and calculate uniformity using the agreed layout.
Alarm and control check
Verify setpoint tracking, high/low limits and lamp-output fault response.
Verify setpoint tracking, high/low limits and lamp-output fault response.
Documentation package
Supply factory records and third-party metrology documentation within the confirmed scope.
Supply factory records and third-party metrology documentation within the confirmed scope.
JJG 879-2015 applies to ultraviolet radiometers. JJF 1101-2019 applies separately to temperature and humidity parameters of environmental test equipment; it is not used as the basis for UV irradiance calibration.
IMAGE 07 · Calibration at the specimen plane真实校准照片：340 nm或313 nm专用探头放置于样品测试平面，仪表证书编号可打码；同时保留设备编号和测量点位。uv-irradiance-calibration-specimen-plane.webp · ALT: Traceable UV irradiance calibration performed at the specimen plane
IMAGE 08 · FAT record and third-party report将FAT多点数据表和第三方报告关键页并排拍摄/扫描；必须让用户看出报告测的是整机均匀度还是仅校准辐照计。客户、证书编号和签名可脱敏。tower-uv-chamber-fat-metrology-report.webp · ALT: UV chamber factory acceptance record and third-party metrology report
Configuration boundary
State what is included, selectable and application-specific.
| Configuration item | Standard | Selectable / custom | Confirm in the order |
|---|---|---|---|
| Lamps | 8 × 40 W UVA-340 | UVB-313/UVB-313EL | Exact brand, model and quantity |
| Irradiance control | Four sample-plane sensors; closed-loop control | Method-specific setpoint | Wavelength, range and FAT setpoint |
| Moisture | Condensation and water spray | Method-specific sequence | Water quality, supply and drainage |
| Specimen holders | Flat-panel frames | Irregular-part fixtures or shelf arrangement | Drawing, weight, target face and capacity |
| Exterior | Order-specific finish | Stainless-steel or painted exterior | Material and finish |
| Data | Local recording and CSV export | Logging interval | Required fields and retention workflow |
| Spare lamps | Not included | Purchased separately | Lamp type and spare quantity |
| Metrology documentation | Third-party documentation at no additional charge | Additional customer-specific points | Measured items and report scope |
Buyer and laboratory FAQ
Resolve the method and specimen details before quotation.
When should I choose the tower-type UV aging chamber?
Choose it when standardized flat specimens, dual-sided exposure and high panel throughput match the laboratory workflow. Finished products and large or irregular 3D parts require a fixture and geometry review; a box-type chamber may be more suitable for some applications.
Should I select UVA-340 or UVB-313?
Use the lamp specified by the governing method or validated internal procedure. UVA-340 is commonly used when the short-wave region of terrestrial sunlight is the priority. UVB-313 is a more severe short-wave source and should not be selected only to obtain faster visible damage.
Must the chamber be recalibrated when the lamp type changes?
Yes. Select the corresponding lamp type and 340 nm or 313 nm control wavelength, enter the method-specific setpoint, and complete irradiance recalibration before formal exposure.
Does 48-position capacity mean the entire area of every specimen is uniformly exposed?
No. Holder capacity and calibrated effective exposure area are different specifications. The combined effective exposure area is 0.38 m² across both sides; confirm the target exposed region for longer panels.
Can the chamber test three-dimensional parts?
Conditionally. Provide the part drawing, weight and target exposure surface. A custom holder or shelf arrangement may be required, and curved surfaces cannot remain uniformly at the nominal lamp distance.
Are lamps replaced at a fixed number of hours?
No. The controller tracks group runtime and provides a maintenance reminder, but replacement is based on measured performance. Replace the lamps when the closed-loop system can no longer maintain the required setpoint, or after a confirmed lamp failure.
Does the alarm identify the failed lamp?
No. The alarm is system-level and does not identify an exposure side or individual lamp. Stop, electrically isolate and cool the chamber before lamp-by-lamp inspection.
Does ASTM G154 define one universal test cycle?
No. It describes operation of fluorescent UV apparatus and includes multiple possible conditions. The material method or customer procedure must identify the required lamp, irradiance, temperature, moisture cycle and evaluation criteria.
Application engineering review
Send the method, specimen and acceptance requirements.
Receive a configuration review covering the lamp, irradiance, moisture cycle, specimen capacity, utilities, data records and third-party documentation before quotation.
MethodStandard, edition and exact cycle
SpecimenMaterial, drawing, quantity and target face
ControlLamp, irradiance, temperature and wetting
DeliverablesPower, water, data, FAT and report scope
Continue your selection
Compare the architecture and weathering method.
Dexiang｜ Instruments
As a high-tech manufacturer, we integrate R&D, design, production, and sales under one roof. Our philosophy—"Quality Ensures Survival, Integrity Drives Development, and Management Yields Efficiency"—is woven into every product we build. We continuously assimilate cutting-edge global technologies and refine our practices through years of hands-on experience.
