UL Insment KS-67B UL-Compliant Rain Test Chamber

Overview

The UL Insment KS-67B Rain Test Chamber is an engineered environmental simulation system designed specifically for evaluating the ingress protection (IP) performance of electrical and electronic enclosures under controlled vertical rain exposure conditions. It operates on the principle of calibrated water droplet impingement—reproducing defined rainfall intensities, angles, and durations per UL 484 Section 34 (Figure 34.1) and aligned with the test methodology specified in IEC 60529 for IPX1 (dripping water) and IPX3 (oscillating or directed rain). Unlike generic water resistance testers, the KS-67B integrates traceable flow calibration, fixed-angle nozzle positioning, and stable support architecture to ensure repeatable test execution across laboratory and certification environments. Its mechanical design prioritizes operator safety, long-term hydraulic integrity, and compatibility with standard laboratory utility infrastructure—including deionized water supply and ambient temperature control.

Key Features

• UL 484–compliant spray configuration meeting Figure 34.1 requirements: single-axis oscillating spray bar delivering 3.0 ± 0.5 mm/min rainfall intensity at 60° from vertical
• Stainless steel structural frame with modular mounting points for sample fixtures, enabling rapid reconfiguration for varying enclosure dimensions
• Calibrated brass nozzles with standardized orifice geometry (0.4 mm diameter) and pressure-regulated water delivery (50–100 kPa)
• Integrated digital timer (0–99 min 59 s) with audible end-of-test signal and manual override capability
• Non-drip drip tray with integrated drain port and level indicator for consistent water management
• CE-marked electrical components; all wiring conforms to IEC 61000-6-3 EMC emission limits

Sample Compatibility & Compliance

The KS-67B accommodates samples with maximum external dimensions of 1200 mm (W) × 1200 mm (D) × 1200 mm (H), supporting both wall-mounted and freestanding enclosures. It is routinely deployed in third-party testing laboratories—including UL’s Shanghai Lab and TÜV Rheinland’s Guangzhou facility—for pre-certification validation of HVAC equipment, outdoor-rated power distribution units, and industrial control panels. The chamber satisfies the physical test setup requirements of UL 484 (Household and Similar Electrical Appliances – Safety), UL 60335-1 (General Requirements for Household Appliances), and IEC 60529 Annex B. While not itself a certified calibration instrument, its mechanical repeatability supports GLP-compliant test documentation when used with validated water flow meters and calibrated timers per ISO/IEC 17025 clause 7.7.

Software & Data Management

The KS-67B is a manually operated, hardware-controlled system without embedded firmware or data logging capabilities. All operational parameters—including test duration, water pressure, and nozzle alignment—are set and verified physically prior to test initiation. This architecture ensures deterministic behavior and eliminates software-related failure modes during critical compliance testing. For laboratories requiring audit-trail documentation, integration with external digital timers (e.g., Keysight U1282A) and calibrated flow meters (e.g., Bronkhorst EL-FLOW Select) is supported via standardized 4–20 mA analog outputs and dry-contact triggers. Test records—including date/time stamp, operator ID, sample ID, and observed leakage status—are maintained externally in laboratory information management systems (LIMS) compliant with FDA 21 CFR Part 11 requirements where applicable.

Applications

• Pre-submission verification of IPX1 and IPX3 ratings for UL 484–listed air conditioners and heat pumps
• Design validation of outdoor junction boxes, photovoltaic inverters, and EV charging station enclosures
• Quality assurance testing for consumer electronics with weather-exposed interfaces (e.g., smart thermostats, outdoor security cameras)
• Internal R&D screening of gasket compression performance and sealant adhesion under cyclic wetting conditions
• Supporting ISO 9001:2015 clause 8.5.1 (Control of Production and Service Provision) through documented environmental stress protocols

FAQ

Does the KS-67B meet IPX4 requirements?
No—the KS-67B is configured exclusively for UL 484 Figure 34.1 (vertical oscillating rain) and IEC 60529 IPX1/IPX3. IPX4 requires splashing water from any direction, necessitating a rotating turntable and multi-axis spray manifold not present in this model.
Can deionized water be substituted with tap water?
Tap water is not recommended due to mineral deposition risk on nozzles and potential conductivity-induced false leakage readings. Deionized water (≤1 µS/cm) is required for UL-compliant testing and long-term nozzle longevity.
Is calibration certification included with shipment?
The unit ships with a factory verification report confirming nozzle orifice dimensions, structural alignment, and flow rate consistency at nominal pressure. Formal ISO/IEC 17025 calibration must be performed by an accredited third-party lab using traceable standards.
What maintenance intervals are recommended?
Nozzle inspection and cleaning every 50 operational hours; stainless steel frame wipe-down after each test cycle; annual verification of hose fittings and pressure regulator function per manufacturer’s maintenance log template.
Is technical support available outside China?
Yes—Insment provides remote engineering support in English for installation commissioning, troubleshooting, and compliance documentation review. On-site service is available in APAC, EU, and North America through authorized regional partners under contractual SLA.