General lab & storage
Stability chamber
A cabinet or walk-in room that holds samples at a controlled temperature and relative humidity for months or years, so that the shelf life of a drug product can be established under ICH storage conditions.
- Pharmaceutical
- Biotech
- Medical devices
- Cosmetics
- Food & nutraceuticals
- Packaging
TROUBLESHOOTING
Common problems, causes and fixes
RH below set point
Likely causes
- • Humidifier water supply empty
- • Scaled or failed humidifier element
- • Door gasket leaking
What to do
- • Refill with purified water and check the supply line
- • Descale or replace the humidifier element
- • Replace the door gasket
RH above set point
Likely causes
- • Dehumidifying coil iced or not cooling
- • Wet samples or open water container inside
- • Blocked condensate drain
What to do
- • Defrost and check the refrigeration system
- • Remove the source of moisture
- • Clear the drain
Temperature slowly drifting high
Likely causes
- • Dirty condenser coil
- • Low refrigerant
- • Room too warm around the chamber
What to do
- • Clean the condenser
- • Call service to check refrigerant
- • Improve room ventilation or air conditioning
Display and monitoring system disagree
Likely causes
- • Sensor drift
- • Probes in different positions
- • Monitoring probe out of calibration
What to do
- • Calibrate both sensors against a reference
- • Check probe locations against the mapping report
- • Recalibrate or replace the drifting probe
Frequent short alarms
Likely causes
- • Frequent or long door openings
- • Alarm delay set too short
- • Controller tuning poor
What to do
- • Plan sample pulls together
- • Set a justified alarm delay in the SOP
- • Ask service to re-tune the controller
Uneven conditions between shelves
Likely causes
- • Overloading or blocked air paths
- • Fan fault
What to do
- • Reduce load and keep space around packs
- • Check and repair fans; re-map if needed
In LimsPulse · Calibration Management
Keep every Stability chamber in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.