FB224 Automatic Internal Calibration Precision Analytical Balance

Overview

The FB224 Automatic Internal Calibration Precision Analytical Balance is an ISO/IEC 17025-aligned laboratory-grade analytical balance engineered for high-accuracy mass measurement in regulated and research environments. It operates on electromagnetic force compensation (EMFC) principle—utilizing a high-sensitivity rear-mounted electromagnetic sensor to generate a counterforce proportional to the sample’s gravitational load. This architecture eliminates mechanical hysteresis and creep effects commonly associated with strain-gauge transducers, delivering superior long-term stability and metrological integrity. Designed to meet the performance requirements of Class I analytical applications per OIML R 76-1 and ASTM E898–22, the FB224 achieves 0.1 mg readability at full 220 g capacity, with repeatability ≤ 0.1 mg and linearity error within ±0.2 mg across its entire range. Its internal dual-weight calibration system—comprising two certified stainless-steel reference masses—is fully automated and triggered via front-panel command or scheduled intervals, ensuring traceable compliance without external weights or service intervention.

Key Features

• Electromagnetic force compensation (EMFC) sensor with rear-mount configuration for enhanced thermal stability and reduced vibration coupling
• Automatic dual-point internal calibration using factory-traceable, hermetically sealed reference masses (no user handling required)
• Digital multi-point linearization algorithm applied during factory calibration and retained in non-volatile memory for consistent accuracy across the full weighing range
• Full-height transparent glass draft shield (195 × 160 × 235 mm) with front-access design—no vertical support columns obstructing pan access or sample placement
• Six-key integrated control panel with backlit LCD display supporting tare, unit conversion (g, mg, ct, oz, lb, %), counting mode, and memory recall
• RS232 serial interface compliant with standard SCPI command set for bidirectional communication with LIMS, ELN, or QC software platforms
• Dual-power operation: configurable between AC mains (100–240 V, 50/60 Hz) and optional 9 V DC battery for portable or backup use

Sample Compatibility & Compliance

The FB224 accommodates samples up to 220 g on its Φ90 mm stainless-steel weighing pan, optimized for compatibility with standard labware including crucibles, vials, filtration assemblies, and powder dispensing tools. Its draft shield meets ISO 9001:2015 environmental control recommendations for analytical balances used in controlled laboratories. The instrument conforms to EN 45501:2015 (previously OIML R 76-1) for legal metrology classification as a Class I balance. Firmware supports audit trail logging (user ID, timestamp, calibration event, tare action) aligned with FDA 21 CFR Part 11 requirements when connected to validated data acquisition systems. It is routinely deployed in GLP-compliant pharmaceutical stability studies, USP precision testing, and ISO/IEC 17025-accredited calibration labs where documented metrological traceability is mandatory.

Software & Data Management

The FB224 natively supports ASCII-based data streaming over RS232 at configurable baud rates (9600–115200 bps). No proprietary driver is required; it functions as a virtual COM port under Windows, macOS, and Linux. Data output includes real-time weight, stability flag, unit code, and tare status—enabling direct integration with Excel, LabVIEW, MATLAB, or enterprise QC platforms such as TrackWise or LabWare LIMS. Optional firmware upgrade enables GLP-compliant data export with embedded digital signatures and time-stamped calibration logs. All internal calibration events are stored with date/time stamps and reference mass IDs, accessible via query command “CAL?”—facilitating internal audit readiness and regulatory inspections.

Applications

• Pharmaceutical formulation: active pharmaceutical ingredient (API) dispensing, excipient blending verification, and USP repeatability assessment
• Academic research: gravimetric analysis, stoichiometric reaction monitoring, and nanomaterial mass dosing
• Materials science: density determination via pycnometry, catalyst loading quantification, and thin-film thickness validation
• Quality control labs: incoming raw material inspection, finished product net content verification, and statistical process control (SPC) charting
• Environmental testing: filter mass gain analysis in PM2.5/PM10 sampling protocols per EPA Method IO-3.2

FAQ

Does the FB224 require external calibration weights for routine verification?
No. Its dual-mass internal calibration system eliminates dependency on external standards for daily or periodic verification. External weights are only required for initial factory certification or third-party accreditation audits.
Is the RS232 interface compatible with modern Windows 11 and macOS Sequoia systems?
Yes—via standard USB-to-serial adapters (e.g., FTDI or CP2102 chipsets) and native CDC ACM drivers. No vendor-specific software installation is necessary.
Can the FB224 be used in environments with temperature fluctuations?
It features automatic ambient temperature compensation (ATC) and stabilizes within 3 seconds after a ±1°C shift, meeting ISO 17025 Clause 5.5.2 requirements for environmental influence management.
What is the warranty coverage and service support structure?
Standard 24-month limited warranty includes parts and labor. Global technical support is provided through authorized service centers in EU, NA, and APAC regions, with firmware updates and calibration certificate reissuance available online via secure portal.