Yoke FA-C Series Fully Automatic Internal Calibration Analytical Balance

Overview

The Yoke FA-C Series Fully Automatic Internal Calibration Analytical Balance is engineered for precision mass measurement in regulated laboratory environments—including QC/QA labs, pharmaceutical R&D, academic research, and chemical synthesis workflows. Utilizing electromagnetic force restoration (EMFR) sensing technology, the FA-C series delivers high reproducibility and long-term stability across its full capacity range (100 g to 220 g). Each unit features a built-in calibration mass and motorized actuation system that executes automatic internal calibration upon power-up, after temperature drift detection, or at user-defined intervals—ensuring traceable accuracy without external weights or manual intervention. The balance conforms to fundamental metrological principles defined in OIML R76-1 and ISO/IEC 17025 requirements for calibration validity and uncertainty management.

Key Features

• Electromagnetic force compensation sensor architecture with active temperature compensation and digital filtering for enhanced stability under ambient fluctuations.
• Internal calibration system compliant with ISO 9001 and GLP documentation standards; calibration events are timestamped and stored with audit trail capability.
• Backlit high-contrast LCD display (128 × 64 pixels) optimized for low-glare viewing under varied lighting conditions, supporting multi-language interface (English, Spanish, French, German).
• Five-sided transparent draft shield with sliding front door and ergonomic height (240 mm working clearance), designed to minimize air turbulence while enabling easy sample access and cleaning.
• Integrated overload protection and real-time fault diagnostics—including sensor saturation, draft shield misalignment, and thermal drift alerts—with self-recovery protocols where applicable.
• Modular printed circuit board architecture with high-density surface-mount components and EMI-shielded signal paths to ensure signal integrity and resistance to electromagnetic interference.

Sample Compatibility & Compliance

The FA-C Series accommodates standard laboratory samples including powders, granules, liquids in tared containers, and small solid specimens up to 220 g. The Φ80 mm stainless steel weighing pan provides uniform load distribution and corrosion resistance. All models meet CE marking requirements under the EU Measuring Instruments Directive (MID 2014/32/EU) for non-automatic weighing instruments. For regulated industries, the balance supports 21 CFR Part 11-compliant data handling when connected to validated PC-based software (e.g., YokeBalance Suite v3.2+), including electronic signatures, audit trails, and secure user role management. It is suitable for applications referenced in USP , EP 2.1.3, and ASTM E898–19 for analytical balance qualification.

Software & Data Management

YokeBalance Suite (Windows-compatible) enables bidirectional communication via RS232 or optional USB interface. The software supports customizable report templates (PDF/CSV/XLSX), statistical process control (SPC) charting (mean, SD, CV%, trend analysis), and batch-wise data archiving with metadata tagging (operator ID, location, environmental conditions). All calibration logs, weighing records, and system events are stored with immutable timestamps and checksum verification. Optional network integration allows centralized monitoring across multiple balances in shared lab infrastructure, with TLS 1.2 encrypted transmission for data security.

Applications

• Pharmaceutical formulation development and content uniformity testing per USP .
• Gravimetric preparation of reference standards and calibration solutions in clinical chemistry labs.
• Weighing of catalysts, reagents, and intermediates in fine chemical synthesis requiring ±0.1 mg repeatability.
• Moisture content determination via loss-on-drying (LOD) protocols when paired with compatible moisture analyzers.
• Educational use in undergraduate physical chemistry and materials science laboratories for density and molar mass experiments.
• Environmental testing labs performing filter weighing for particulate matter (PM2.5/PM10) analysis per EPA Method 201A.

FAQ

What calibration standards does the FA-C Series comply with?

The internal calibration mechanism satisfies ISO 9001 clause 7.1.5.2 and ISO/IEC 17025:2017 section 6.4.10 for in-house calibration validity. Traceability is maintained through factory-certified internal masses calibrated against NIST-traceable references.
Is external recalibration required during routine operation?

No—automatic internal calibration eliminates routine external recalibration. However, periodic verification using certified test weights (e.g., Class E2 or better) is recommended per ISO/IEC 17025 and internal SOPs, especially before critical measurements or after transport.
Can the balance be integrated into a LIMS or ELN environment?

Yes—via ASCII-based RS232 output or optional Ethernet module, the FA-C Series supports direct data streaming to LIMS platforms with configurable delimiters and header formats. Yoke provides documented API specifications and validation support packages.
What environmental conditions affect performance?

Optimal operation requires stable ambient temperature (18–25°C, ≤5°C/h drift), relative humidity 30–70% RH (non-condensing), and vibration isolation. Built-in temperature sensors trigger recalibration if ΔT exceeds ±1.5°C from last calibration event.
Does the FA-C Series support GMP/GLP-compliant record keeping?

When used with YokeBalance Suite and configured with password-protected user roles, electronic signatures, and enabled audit trail logging, the system meets ALCOA+ principles and supports FDA inspection readiness for 21 CFR Part 11 compliance.