What is LV124 K-12 Test?
The LV124 K-12 test is a critical automotive standard defined by Volkswagen Group for evaluating the durability and reliability of electronic components under combined splash water and thermal shock conditions.
Test Principle
The LV124 K-12 test simulates intermittent splash water exposure combined with rapid local cooling, while the device under test remains stationary in the workroom. The T-1000A system applies controlled bursts of cold water (0–4°C) at precise intervals, creating rapid thermal stress on components without moving them between temperature zones.
Operating Modes Before Splash
The DUT operates under defined electrical conditions during the test:
Mode II.a:
DUT is powered and operating under a specified functional load
Mode II.c:
DUT is in an alternative operating or standby condition, as defined by LV124
These modes ensure the component is electrically active or thermally loaded before splash exposure.
Test Sequence and Timing Definition
According to LV124 (Figure 30 – Splash Water Test Splashing Times), one complete test cycle is defined as follows:
t₁ – Total cycle time: 30 minutes
Each test cycle lasts 30 minutes from start to start.
t₂ – High-temperature operating phase: 14 minutes 57 seconds
The DUT operates in the defined electrical operating mode (e.g. Mode II.a), allowing the component to heat up and reach a stable thermal condition.
No water is applied during this phase.
t₃ – Splash water application: 3 seconds
Cold water (typically 0°C to 4°C) is sprayed directly onto the DUT surface for 3 seconds.
This short-duration splash creates a sudden temperature gradient between the component surface and internal structure, generating thermal stress.
Cycle Repetition and Evaluation
The sequence of heating → splash → recovery constitutes one LV124 K-12 test cycle. The test is repeated for a specified number of cycles as defined by the test plan. Throughout the test, the DUT is monitored for functional stability, electrical integrity, and mechanical damage.
Advantages of LV124 K-12 Temperature Shock and Splash Water Test Equipment
1. LV124-Compliant Single-Zone Test Concept
The DUT remains in a single workroom throughout the test, eliminating mechanical transfer between temperature zones. Thermal shock is generated exclusively by controlled cold splash water, fully aligned with the LV124 K-12 test principle and avoiding unnecessary mechanical stress.
2. Robust Workroom Design for Repeated Splash Shock
The mirror-finished SUS304 stainless steel interior offers excellent corrosion resistance against low-temperature water exposure and long-term thermal cycling. A 250 kg load capacity allows testing of heavy automotive electronic assemblies without structural deformation.
3. Precise and Repeatable Thermal Control
A PID-controlled heating system with nichrome elements and Class A PT-100 sensors ensures stable temperature control before splash application. Combined with a TECUMSEH mechanical refrigeration system, the equipment maintains consistent thermal conditions cycle after cycle.
4. LV124-Optimized Splash Water System
The triple wedge-shaped nozzle design delivers 0–4°C splash water at 3–4 L/min, applied for 3 seconds per cycle at a fixed distance of 300–350 mm from the DUT. This configuration creates a rapid surface temperature drop while ensuring repeatable and uniform splash impact.
5. Advanced Control, Monitoring, and Data Traceability
A 7-inch color touchscreen controller supports programmable multi-step test cycles in accordance with LV124 K-12. Ethernet and USB interfaces enable remote operation and data export, while 365-day data storage ensures full traceability for laboratory audits and OEM validation.
Specifications of LV124 K-12 Temperature Shock and Splash Water Test Equipment
Parameter | Specification |
Model | T-1000A |
Internal Dimension (mm) | 1000 [D] × 1000 [W] × 1000 [H] |
Exterior Dimension (mm) | 2000 [D] × 1200 [W] × 2200 [H] |
Interior Volume (L) | 1000 |
Temperature Range | Ambient ~ +150°C |
Splash Water Temperature | 0°C ~ 4°C |
Splash Water Time | 3 s, adjustable |
Water Flow Rate | 3 ~ 4 L/min |
Distance from Nozzle to DUT | 300 ~ 350 mm |
Temperature System | Nichrome heating element, PT-100 Class A sensor |
Cooling System | Mechanical compression refrigeration, French TECUMSEH compressor |
Air Circulation | Centrifugal wind fan |
Controller | Programmable color LCD touch screen, Ethernet, USB |
Safety Devices | Over-temperature protection; Over-current protection; Refrigerant high-pressure protection; Earth leakage protection |
Exterior Material | Steel plate with protective coating |
Interior Material | SUS304 stainless steel |
Thermal Insulation | Polyurethane foam and insulation cotton |
Observation Window | Interior lighting, double-layer thermo stability silicone rubber sealing |
Standard Configuration | 1 cable hole (Φ100 mm) with plug |
Environmental Conditions | +5°C ~ +35°C, ≤85% RH |
Power Supply | AC 380V, 50Hz, 3-phase |
LIB Industry Service and Support
Comprehensive After-Sales Services:
3-Year Warranty covering defects in materials and manufacturing
Lifetime Technical Support with spare parts availability
On-Site Engineering Service available upon request
Replacement Guarantee if issues cannot be resolved
Pre-Delivery Installation & Commissioning, plug-and-play ready
Looking for LV124 K-12 compliant temperature shock and splash water test equipment for automotive electronics?
Contact us: inquiry@libtestchamber.com
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