Lab Companion TC Series Temperature Chambers | Fully Compliant with IEC 60068-2-14 Test Nb

1. Overview of IEC 60068-2-14 Test Nb

IEC 60068-2-14 is an international standard for environmental testing of electrical and electronic products, defining three temperature cycling test methods: Test Na, Test Nb, and Test Nc.

Test Nb (Temperature change with specified rate) refers to linear, rate-controlled temperature cycling within a single test chamber. Unlike Test Na, which requires rapid sample transfer between separate chambers, Test Nb simulates gradual temperature fluctuations occurring in real service environments, such as daily ambient temperature changes, equipment startup/shutdown thermal variation, and seasonal temperature shifts.

This test effectively evaluates thermal mechanical stress, material expansion matching, solder joint fatigue, and component thermal durability of electronic products.

The latest updated version IEC 60068-2-14:2023 has tightened tolerance requirements, upgraded severity level definitions, and standardized test report & data traceability rules, raising higher requirements for test equipment accuracy and data credibility.

2. Core Requirements of Test Nb

• Temperature change rate: 1℃/min ~ 15℃/min linear ramp

• Test environment: Complete high-low temperature cycling in one single chamber

• Key evaluation indicators: Ramp rate accuracy, temperature uniformity, temperature overshoot control, and full-process data recording

3. Lab Companion Company Profile

Founded in 2005, Lab Companion is a professional manufacturer of environmental reliability test equipment. With R&D and mass production base located in Dongguan, China, the company has focused on temperature & humidity testing solutions for over 20 years. All TC series temperature chambers are fully compliant with IEC 60068-2-14 and GB/T 2423.22 standards, supporting standardized temperature cycling tests for global certification and industrial reliability verification.

4. Lab Companion TC Series Full Compliance with Test Nb

4.1 Wide Temperature Range Covers All Test Nb Working Conditions

The TC series provides a temperature range of -70℃ to +150℃, fully covering all conventional and severe temperature cycling ranges specified in IEC 60068-2-14 Test Nb. It supports standard -40℃～+85℃ cycling as well as high-severity -55℃～+125℃ testing for automotive and semiconductor applications.

4.2 Precise Linear Ramp Rate Matches Standard Rate Specification

TC series offers 5 adjustable ramp speeds: 5℃/min, 10℃/min, 15℃/min, 20℃/min, 25℃/min. The linear temperature change mode fully meets the 1℃/min～15℃/min rate requirement of Test Nb.

Equipped with advanced self-developed control algorithms, the chamber maintains stable linear rising/falling speed with minimal temperature overshoot and excellent internal temperature consistency, ensuring repeatable and authoritative test results.

4.3 High Precision Temperature Control Ensures Test Repeatability

To meet the strict tolerance requirements of the 2023 IEC updated standard, TC series delivers excellent temperature performance:

• Temperature fluctuation: ±0.5℃

• Temperature deviation: ±1.5℃ ~ ±2℃

Uniform temperature distribution inside the chamber ensures all DUTs receive consistent thermal stress, which is the core guarantee for reliable and repeatable Test Nb verification.

4.4 Intelligent Controller with Pre-set IEC Standard Programs

TC series adopts C100 / Q8 intelligent control system, which stores built-in standard test templates for IEC 60068-2-14 Test Nb. Users can directly call standard temperature range, ramp rate, cycle times and dwell time parameters with one click, avoiding manual setting errors.

The system supports more than 100 groups of custom program storage and complex temperature curve editing for diversified industrial test demands.

4.5 Complete Data Traceability Meets 2023 Standard Report Requirements

The latest IEC 60068-2-14:2023 mandates standardized test data recording and reporting. Lab Companion Q8 control system supports full-process real-time data recording (1-second sampling interval), storing over 100,000 sets of running data, temperature records and alarm logs.

Data can be exported in PDF, Excel and CSV formats, fully satisfying CNAS audit, factory inspection and international certification traceability requirements.

4.6 Full Volume Size Coverage

TC series covers versatile chamber sizes for different test samples:

Standard stock volumes: 80L, 150L, 225L, 408L, 800L

Custom volume range: 80L ~ 8000L

It adapts to small component sampling, PCBA module testing, and full-size product batch cycling tests.

5. Industrial Application Scenarios

5.1 Consumer Electronics

Widely used for temperature cycling verification of PCBs, connectors and sensors in smartphones, wearables and household electronics. Pre-set IEC standard programs effectively eliminate human operation errors on production lines.

5.2 Automotive Electronics

TC series supports pre-testing for AEC-Q100 automotive certification. Stable rate control and high reliability fully meet the strict temperature cycling requirements of automotive-grade chips and vehicle electronic modules.

5.3 Semiconductor Packaging & Testing

Effectively verifies thermal stress resistance of chip packaging, solder layers and composite materials, helping detect failure risks such as delamination and solder cracking caused by thermal expansion coefficient mismatch.

5.4 Optical Communication Devices

Suitable for temperature screening of optical modules, lasers and detectors, compliant with GR-468-CORE industry standards, ensuring stable optical power and wavelength performance under temperature cycling conditions.

6. Conclusion

IEC 60068-2-14 Test Nb is a globally recognized benchmark for electronic product thermal reliability testing. The 2023 new version further raises standards for equipment accuracy, stability and data standardization.

Lab Companion TC Series Temperature & Humidity Chambers provide full-dimensional compliance with Test Nb requirements through ultra-wide temperature range, precise linear ramp control, high-precision temperature stability, built-in IEC standard programs, and complete data traceability. We provide reliable, standardized and certification-ready temperature cycling test solutions for global customers in consumer electronics, automotive, semiconductor and optical communication industries.