How a tailored design ensured reliability for 100 high-power RTUs under extreme temperature variations.
Background: Real-World Testing Demands Beyond Standard Chambers
In August 2022, a customer contacted LIB Industry with a demanding request - to build a temperature test chamber capable of simulating long-term thermal cycling for RTUs (Remote Terminal Units). The goal was to test the endurance of 100 powered RTUs under fluctuating environmental temperatures while maintaining continuous DC power supply and data connection.
Customer Requirements Overview:
- Test samples: 100 RTUs, 10W each, 400mA, 24VDC (total 1000W).
- Temperature range: 0°C to 70°C; full-load testing up to 85°C.
- Temperature rate: 1°C/min heating and cooling (average).
- Workroom layout: Room for two mobile aging carts; each holds 56 RTUs with individual 24V power.
- Test mode: Programmable high–low temperature cycling with settable duration.
Engineering Challenge: Balancing Power, Heat, and Precision
Testing 100 continuously powered RTUs generates a heavy thermal load and complex air circulation dynamics. The chamber needed to maintain stable temperature gradients, deliver constant DC power, and still achieve 1°C/min cooling rate - even with 2000W of total heat output during full load. This challenge required LIB Industry's multidisciplinary expertise in refrigeration, airflow optimization, and intelligent control.
LIB Industry's Custom Design Solution
Easy Operation with Heavy-Duty Ramp Access
Given the combined weight of 800 kg (RTUs + carts), the temperature test chamber was equipped with a reinforced aluminum ramp pedal. This design enables effortless loading of test trolleys while ensuring safe and stable movement - critical for large-scale industrial testing setups.
Integrated 24V Power System with Smart Control
A built-in DC power supply was integrated inside the test chamber, allowing both carts to be powered simultaneously. Operators can control power on/off directly through the chamber's main controller interface, ensuring synchronized, energy-efficient operation.
Upgraded Cooling and Air Circulation System
LIB Industry enhanced both the refrigeration capacity and internal airflow structure. Even under a 2000W thermal load, the system maintains a cooling rate of 1°C/min, guaranteeing consistent temperature uniformity throughout the workspace.
Dual Aging Carts with High-Density Interface Layout
Two stainless-steel carts were supplied, each fitted with 100 connection points (200 total). The interfaces use Phoenix 1757022 3-terminal pins (line/neutral/ground) with 1.5 mm wiring, providing reliable and safe power delivery to every RTU.
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ESD-Safe Casters with Locking Brakes
Each cart is mounted on anti-static (ESD) casters featuring dual locking brakes, ensuring both mobility and stability during test cycles and loading procedures.
From Concept to Reliable Operation
After evaluation, the customer confirmed the order in February 2023, and by March, the custom temperature test chamber was delivered and installed successfully. During commissioning, the chamber achieved all performance targets:
- Stable operation under full 1000W load
- Consistent temperature cycling accuracy
- Safe and efficient cart handling
- Optimized air balance under all conditions
The customer praised LIB Industry's engineering responsiveness and solution depth, marking this project as a model of successful technical customization.
Why Choose LIB Industry for Custom Environmental Testing Solutions
Professional Advantages
- 16+ years of experience in environmental test chamber manufacturing
- Full coverage of testing categories: temperature, humidity, vibration, and corrosion
- Intelligent control systems for accurate temperature and power management
- Multi-channel monitoring for real-time data collection and analysis
Service & Support
- Global service network providing rapid on-site technical assistance
- 3-year warranty and lifetime technical support
- Fast delivery - only 7–15 days from order to shipment
- 1–3 hour response time for quotations or technical consultations
Partner with LIB Industry for Precision-Engineered Testing Solutions
Every testing need is different - and LIB Industry specializes in making precision custom temperature test chambers that fit your product, process, and performance requirements.
Whether you're testing RTUs, batteries, electronics, or automotive components, our engineering team delivers tailored systems built for reliability, accuracy, and repeatability.
Contact us today:info@libclimatetest.com
Let LIB Industry help you design your next high-performance environmental testing system - with expert support and rapid delivery worldwide.
