AND GF-2002A Precision Top-Loading Balance

Overview

The AND GF-2002A Precision Top-Loading Balance is an entry-level analytical-grade weighing instrument engineered for consistent accuracy and operational reliability in routine laboratory, quality control, and educational environments. Utilizing electromagnetic force compensation (EMFC) technology, the GF-2002A delivers stable, drift-free measurements under standard ambient conditions (20–25 °C, <70% RH). Its 2200 g maximum capacity and 0.01 g readability make it suitable for medium-to-high mass applications where sub-centigram resolution is required—such as sample preparation, formulation checks, reagent dispensing, and batch verification. Designed and manufactured in Japan, the balance adheres to AND’s long-standing engineering standards for mechanical robustness, thermal stability, and long-term calibration retention.

Key Features

• Electromagnetic force compensation (EMFC) sensor system ensures high linearity and minimal hysteresis across the full weighing range.
• External calibration capability using certified weights (Class M2 or better), supporting traceable metrological validation per ISO 9001 and ISO/IEC 17025 requirements.
• Stainless steel weighing pan (165 × 165 mm) with corrosion-resistant coating for compatibility with common solvents and cleaning agents.
• Integrated draft shield mounting points (optional accessory) enable rapid integration into controlled-environment workflows without structural modification.
• Fast stabilization time: ≤1.0 second for loads up to 50 g; ≤1.5 seconds for full-scale loading—optimized for throughput in repetitive weighing tasks.
• Front-panel keypad with tactile feedback and dual-line LCD display (18 mm digit height) for clear readability under varied lighting conditions.
• Auto-zero tracking and auto-tare functions reduce operator-induced error and support sequential multi-sample weighing protocols.

Sample Compatibility & Compliance

The GF-2002A accommodates a broad range of sample types—including powders, granules, liquids in containers, and solid specimens—without requiring specialized fixtures. Its open-top design facilitates easy access and efficient cleaning between samples. The balance operates within Class II environmental specifications (per OIML R76-1), and its performance meets the repeatability and eccentricity criteria defined in USP for “Class II” balances used in pharmaceutical non-critical weighing. While not intrinsically compliant with FDA 21 CFR Part 11 out-of-the-box, the device supports audit-trail-capable data export when connected to validated third-party software platforms compliant with ALCOA+ principles.

Software & Data Management

Data output is supported via RS-232 interface (standard) and optional USB-to-serial adapter. The balance transmits weight values in ASCII format with configurable delimiters and auto-print functionality. When integrated with laboratory information management systems (LIMS) or electronic lab notebooks (ELN), the GF-2002A enables automated timestamped record capture, user ID tagging (via external authentication), and raw data archiving—facilitating compliance with GLP and GMP documentation requirements. Firmware supports firmware-upgradable calibration constants, ensuring long-term adaptability to evolving metrological standards.

Applications

• Raw material receipt inspection and inventory reconciliation in chemical and food manufacturing.
• Weighing of culture media components, buffer salts, and excipients in QC laboratories.
• Preparation of standard solutions and dilution series in environmental and clinical testing labs.
• Teaching fundamental metrology concepts—including uncertainty estimation, calibration hierarchy, and measurement traceability—in university physics and chemistry courses.
• Supporting ASTM D198, ISO 11885, and EN 15002 procedures where precision mass determination is a prerequisite step.

FAQ

What calibration weights are recommended for the GF-2002A?
Certified Class M2 weights (e.g., 200 g and 2000 g) are recommended for full-range verification and adjustment per manufacturer guidelines.
Is internal calibration available on this model?
No—the GF-2002A uses external calibration only; internal motorized calibration is not implemented in this series.
Can the balance be mounted on a vibration-isolated surface?
Yes—its low center of gravity and rigid base allow stable operation on standard lab tables or optional anti-vibration pads (e.g., Sorbothane mounts).
Does the GF-2002A support unit conversion (e.g., g → oz, ct)?
Yes—eight built-in units (g, oz, ct, dwt, gn, lb, ozt, momme) are selectable via front-panel menu.
How is overload protection implemented?
Mechanical stop limits prevent sensor damage at loads exceeding 120% of maximum capacity (2640 g); the display shows “OL” and halts output until reset.