Overview

This document details Meditech's environmentally friendly walk-in cooling cabinets designed for life science and storage applications. The cabinets focus on precise temperature and humidity control, safety, reliability, and advanced software integration for monitoring and management.

1. Safety Features

• Multiple safety cut-offs and alarms located centrally and at security gates.
• Special door locks allowing internal opening even if locked externally.
• Emergency bell switch inside the chamber.
• Dedicated safety system to shut down humidity and chamber systems upon temperature or humidity deviations, with audiovisual alarms.
• Thermostatic safety system and low water level cut-off for humidity control.
• Door open alarm and comprehensive event logging integrated into software.

2. Software and Monitoring

• 21 CFR Part 11 USFDA compliant software with validation documentation.
• Secured audit trail, multi-level password security with aging and history, and electronic signatures.
• Web-based remote monitoring via Ethernet with GSM mobile alerts for alarms.
• Door access security data integrated with remote options.
• Graphical and tabular event logging including mean kinetic temperature reports.
• Extensive DQ, IQ, OQ, and PQ protocols with calibration certificates.
• SAIFIN53 web-based software enables global remote chamber management through browsers without software installation, supporting SMS/email alarm notifications, real-time data display, automatic backups, and system diagnostics.

3. Construction Features

• Pre-fabricated modular panel construction with polyurethane foam (PUF) insulation and reinforced floor panels designed for load and movement.
• Effective air circulation and refrigeration systems.
• Multi-pane vacuum-sealed observation glass window with chamber illumination.
• Stainless steel racks and perforated trays.
• Optional standby refrigeration and humidity systems for redundancy.

4. Control Features

• Microprocessor-based PID controller with auto-tuning for precise temperature and humidity control.
• Multiple point (8+8) temperature and humidity scanning with printer and PC interface for online mapping.
• PLC system for automatic standby system changeover and event logging.
• GSM mobile alert module sending malfunction SMS to multiple phones.
• Door access security with smart cards/biometrics and software authorization.
• Advanced PLC with touchscreen and Ethernet connectivity for remote monitoring.
• Utility management system ensuring continuous operation and cross-checks.

5. Performance Specifications

• Temperature uniformity: ±0.5ºC (standard), ±1ºC (technical data section).
• Humidity range: 40% to 95% RH with ±2% accuracy and ±3% uniformity.
• Noise level: Average maximum 60-70 dBA.
• Digital temperature controls with touchscreen and optional narrow-range chart recorder (±0.5% accuracy).
• Active high/low alarms with automatic corrective actions to prevent product loss.
• Custom-cut, no-waste insulated panels maximizing space utilization, increasing floor space by over 15% compared to standard panels.

6. Airflow and Temperature Control Principles

• Center-mount, low velocity air handler creating an "umbrella airflow" pattern for maximum uniformity without ceiling tiles.
• Use of precision 100 ohm, 3-wire platinum RTD temperature sensors and thin-film polymer humidity sensors with hermetically sealed microprocessor transmitters.
• Balanced refrigeration load with resistive heaters pulsed by PID controller for precise temperature control and energy efficiency.
• Ultrasonic humidification avoids steam boilers, preventing corrosion and heat source disruption.

7. Reliability and Redundancy

• Extra equipment capacity to handle peak cooling and heating loads.
• Automatic compressor restart and robust refrigeration system design for continuous reliability.
• Optional standby refrigeration and humidity systems for redundancy.

8. Humidity Control Considerations

• Humidity control is optional and recommended only when necessary to reduce defrost cycles or protect humidity-sensitive products.
• Benefits include maintaining product quality, reducing moisture loss, extending shelf life, and improving profitability.
• Direct room humidification ensures even humidity distribution.

9. Refrigeration Controls

• PID temperature controls are mandatory for ±0.5ºC uniformity requirements.
• PLC-based touchscreen controllers provide precise control.

10. Technical Data and Models

• Standard Model (S): Inside SS304 mirror polish, outside mild steel powder coated.
• GMP Model (G): Inside and outside SS304 matt buff finish.
• Temperature range: 0°C to -40°C with ±0.2°C accuracy.
• Temperature uniformity: ±1°C.
• Available sizes with internal volumes from 8,000 to 22,500 liters with corresponding dimensions.

11. Surface Finish and Environmental Considerations

• Standard finish: baked white enamel powder-coated mild steel with stainless steel extrusions.
• Stainless steel panels available for highly corrosive environments.

12. Additional Features

• Door access security system with smart cards or biometrics.
• Intelligent active alarms that automatically mitigate out-of-spec conditions.
• Web-based software enabling centralized alarm management, user segregation, and harmonized reporting.
• Remote access and control via standard web browsers without additional software installation.

Summary

Meditech's walk-in cooling cabinets integrate advanced environmental control technology with robust safety, precise control, and comprehensive software monitoring. Their modular design maximizes space utilization and ensures product stability through tight temperature and humidity control. Intelligent alarms, redundancy options, and remote monitoring capabilities make these cabinets suitable for critical life science and storage applications requiring reliable and compliant environmental conditions.

Contact Information

Head Office Address: No.6 President Terrace, Takli Road, Dwarka, Nashik-422011

Phone: 0253 - 6418632