Contents
During operation, temperature and humidity chambers may experience various issues that directly affect the accuracy of test results. One of the common problems recently handled by VintechME is the chamber continuously displaying a humidity level of 100% RH, causing serious deviations in test data.
This article analyzes the root causes and provides professional repair solutions from our engineering team.
The customer reported the following condition:
- The chamber is running, but:
- Humidity constantly displays 100% RH
- Unable to adjust or reduce humidity
Impact:
- Unable to perform standard testing procedures
- Test data becomes inaccurate (ISO, IEC, ASTM, etc.)
On-Site Inspection and Findings
After receiving the request, VintechME engineers conducted an on-site inspection and identified the main causes:
1. Missing Wet-Bulb Wick
The wet-bulb wick is a critical component in wet-bulb/dry-bulb humidity measurement systems.
When the wick is missing:
- The wet-bulb sensor cannot function correctly
- The system misinterprets the environment as fully saturated
→ Resulting in a constant reading of 100% RH
This is the direct cause of the incorrect humidity display.
2. Condenser Fan Failure
The condenser fan is responsible for:
- Heat dissipation of the refrigeration system
- Maintaining stable cooling and dehumidification cycles
When the fan is not operating:
- Cooling efficiency drops significantly
- Moisture cannot condense properly → humidity cannot decrease
- The system may remain “stuck” at 100% RH
This is an indirect but critical cause.
Repair Solutions by VintechME
After analysis, our technical team implemented the following solutions:
✔️ Humidity Measurement System Restoration
- Installed a standard wet-bulb wick
- Checked:
- Water supply to the wick
- Cleanliness and water absorption capability
- Re-calibrated humidity sensors
✔️ Refrigeration System Repair
- Inspected condenser fan:
- Identified faulty fan motor
- Performed:
- Repair/replacement of fan motor
- Checked relay, power supply, and capacitor
- Ensured proper airflow and stable heat dissipation
✔️ Testing & Verification
- Conducted performance tests at multiple levels:
Results:
- Accurate humidity display
- Stable system control
- Fully meets standard testing requirements
Expert Recommendations
To prevent similar issues, VintechME recommends:
- Replace wet-bulb wick periodically (every 2–4 weeks)
- Use DI/RO water to avoid scaling
- Maintain refrigeration system:
- Condenser fan
- Refrigerant gas
- Heat exchangers
- Perform regular sensor calibration in accordance with ISO/IEC 17025
VintechME Testing Chamber Repair Services
VintechME is a leading service provider in Vietnam specializing in:
- Temperature & humidity chamber repair (Climatic Chambers)
- Thermal shock and environmental chamber repair
- Troubleshooting refrigeration, humidity, and control systems
- Fast on-site support nationwide
Images from the repair process of temperature and humidity test chambers (climatic chambers)
- More information about VintechME’s repair and maintenance services for temperature and humidity chambers: https://vintechme.com/vi/dich-vu/sua-chua-bao-duong-thiet-bi.html
- Explore temperature and humidity test chambers supplied by VintechME: https://vintechme.com/vi/san-pham/tu-thu-nghiem-mo-phong-moi-truong/
VintechME Vietnam specializes in the supply, repair, and maintenance of testing equipment, including environmental test chambers, temperature and humidity chambers, and large-scale climatic chambers for QA, QC, and R&D laboratories.
For technical consultation and quotation:
- Website: www.vintechme.com
- Email: info@vintechme.com
- Hotline (Zalo/WhatsApp): +84 966 252 565
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