Axel Semrau CHRONECT XPR Automated Weighing System

Overview

The Axel Semrau CHRONECT XPR Automated Weighing System is an integrated, high-precision laboratory automation platform engineered for reproducible, operator-independent mass measurement in regulated analytical workflows. Built upon a certified analytical balance core (0.01 mg readability, 220 g maximum capacity), the system combines precision gravimetry with six-axis robotic manipulation to eliminate manual handling of samples, containers, and reagents. Its operational principle relies on controlled gravitational force measurement under stabilized environmental conditions—temperature, humidity, and air turbulence are actively monitored and compensated during weighing cycles. The system is explicitly designed for applications requiring strict chain-of-custody documentation, exposure minimization (e.g., cytotoxic compounds, potent APIs, radioactive tracers), and compliance with ISO/IEC 17025, USP , and FDA 21 CFR Part 11 requirements for electronic records and signatures.

Key Features

• Six-degree-of-freedom robotic arm with integrated vacuum gripper and torque-sensing feedback for precise, non-contact handling of vials, weighing boats, and screw-cap containers.
• Automated lid actuation: motorized cap opening/closing mechanism compatible with standard 8–40 mm threaded vials and crimp-top glass ampoules.
• On-deck vortex mixing module (speed range: 500–2500 rpm; programmable duration and acceleration profiles) for homogenization post-weighing.
• Inert atmosphere compatibility: seamless integration with nitrogen or argon purged enclosures (e.g., gloveboxes or isolators) via sealed feedthrough ports and pressure-balanced chamber design.
• Real-time weight stabilization algorithm with dynamic drift compensation, ensuring stable readings within ±0.005 mg over 5 s under ISO 9001-controlled lab conditions (20–25 °C, <40% RH).
• Modular sample carrier: supports dual-tier racks accommodating up to 32 powder vials (e.g., 2 mL scintillation vials) and 6 liquid reagent bottles (e.g., 15–50 mL HDPE or amber glass) simultaneously.

Sample Compatibility & Compliance

The CHRONECT XPR accommodates a broad spectrum of physical sample forms—including hygroscopic powders, volatile solvents, viscous suspensions, and air-sensitive organometallics—without cross-contamination or operator exposure. All wetted components (gripper tips, cap actuators, mixing heads) are constructed from electropolished 316L stainless steel or PTFE-coated alloys, compliant with USP Class VI biocompatibility standards. The system meets mechanical safety requirements per EN 61000-6-2 (EMC immunity) and EN ISO 12100 (risk assessment for machinery). Full traceability is enforced through mandatory user authentication, time-stamped digital logs, and configurable audit trails aligned with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Software & Data Management

Controlled via CHRONECT Control Suite (v4.2+), a Windows-based application validated for 21 CFR Part 11 compliance. The software provides role-based access control (RBAC), electronic signature capture with biometric or token-based verification, and encrypted local database storage (SQLite with AES-256). All weighing events—including tare, gross, net mass, environmental metadata (T/RH/barometric pressure), and robotic motion logs—are exported in ASTM E1382-compliant .csv or .xml formats. Integration with LIMS (e.g., LabWare, Thermo Fisher SampleManager) is supported via HL7 and RESTful API interfaces. Raw data integrity is preserved through write-once-read-many (WORM) archival options and SHA-256 hash validation per batch.

Applications

• Preparation of reference standards and calibration solutions in pharmaceutical QC laboratories (ICH Q2(R2)-aligned method validation).
• High-throughput formulation development for solid dosage forms, including blend uniformity sampling and active pharmaceutical ingredient (API) dispensing.
• Weighing of nanomaterials and catalyst precursors under inert atmosphere to prevent oxidation or hydrolysis.
• Toxicology and radiopharmaceutical synthesis where ALARA (As Low As Reasonably Achievable) exposure limits mandate full automation.
• ISO/IEC 17025-accredited reference material certification, including uncertainty budgeting per GUM (JCGM 100:2008).

FAQ

Does the CHRONECT XPR require external vibration isolation?
Yes. For optimal repeatability at 0.01 mg readability, installation on a granite slab or active pneumatic isolation table meeting ISO 27893:2019 Class A specifications is recommended.
Can the system be validated for GMP use?
Yes. IQ/OQ/PQ protocols are provided by Axel Semrau’s Qualified Service team, including documented risk assessments, sensor calibration certificates (traceable to PTB), and performance qualification against USP repeatability criteria.
Is remote monitoring supported?
Yes. The Control Suite includes secure TLS 1.3-enabled web dashboard for real-time status viewing, alarm notifications, and historical trend analysis without direct network exposure.
What maintenance intervals are specified?
Robotic arm lubrication and balance internal calibration verification are scheduled every 6 months; full preventive maintenance (including load cell linearity check and vacuum system leak test) is performed annually by certified field engineers.
How is data backup handled?
Automated daily encrypted backups to network-attached storage (NAS) or cloud object storage (AWS S3 or Azure Blob) with versioned retention and automatic integrity verification via checksum comparison.