AND GF-603A Precision Balance (620 g / 0.001 g)

Overview

The AND GF-603A Precision Balance is a high-stability, external-calibration laboratory balance engineered for routine quantitative weighing tasks requiring milligram-level resolution in quality control, research, pharmaceutical formulation, and educational laboratories. Designed and manufactured in Japan by A&D Company, Ltd.—a globally recognized leader in precision measurement instrumentation—the GF-603A operates on electromagnetic force compensation (EMFC) principle, ensuring linear response, minimal drift, and high reproducibility across its full 620 g capacity range. Its 0.001 g readability meets the performance requirements of ISO/IEC 17025-accredited testing labs for non-critical mass determinations, including sample preparation, reagent dispensing, and gravimetric standardization. The compact footprint and robust mechanical architecture support integration into fume hoods, laminar flow cabinets, or benchtop analytical workstations without compromising thermal stability or vibration resistance.

Key Features

• Electromagnetic force compensation (EMFC) sensor with temperature-compensated feedback loop for long-term zero stability and linearity.
• High-resolution LCD display with backlight and intuitive icon-driven interface—supports unit switching (g, oz, ct, lb, etc.) and tare function with auto-zero tracking.
• External calibration capability using certified Class M2 or better weights; calibration log accessible via front-panel menu for traceability.
• Stabilization time of ≤1.0 second for full-scale loads and as fast as 0.8 seconds for small masses (e.g., 5 g), enabling efficient throughput in high-volume QC environments.
• 128 × 128 mm stainless steel weighing pan with raised perimeter edge to prevent spillage; corrosion-resistant housing compatible with mild solvents and routine lab cleaning agents.
• RS-232 serial interface standard; optional USB-to-RS232 adapter available for direct connection to LIMS or ELN systems—supports ASCII data output with timestamp and unit identification.

Sample Compatibility & Compliance

The GF-603A accommodates solid, granular, and low-viscosity liquid samples within its 620 g limit. It is not intended for dynamic or continuous weighing applications (e.g., filling, checkweighing conveyor lines) nor for use with volatile, corrosive, or magnetically active substances without appropriate containment. The balance complies with international electromagnetic compatibility (EMC) standards IEC 61326-1 (industrial environment) and safety standard IEC 61010-1. While not inherently 21 CFR Part 11 compliant, its RS-232 output supports integration with validated software platforms that provide audit trail, electronic signature, and data integrity controls required under GLP and GMP frameworks. Routine verification per ASTM E898–22 (Standard Guide for Verification of Analytical Balances) is recommended prior to critical measurements.

Software & Data Management

No proprietary software is bundled with the GF-603A; however, its ASCII-based RS-232 protocol ensures seamless compatibility with third-party data acquisition tools—including LabX (Mettler Toledo), WinWedge (TAL Technologies), and custom Python/Excel VBA scripts. Output format includes weight value, unit, status flag (stable/unstable), and optional date/time stamp when synchronized with host PC clock. For regulated environments, users may configure output strings to include operator ID or sample ID via prefix/suffix fields—enabling alignment with internal SOPs for raw data recording. Firmware updates (if released) are delivered via A&D’s official technical support portal and require manual installation using a dedicated configuration utility.

Applications

• Preparation of analytical standards and reference solutions in chemistry and environmental testing labs.
• Weighing of active pharmaceutical ingredients (APIs) and excipients during R&D batch formulation (non-GMP pilot scale).
• Gravimetric moisture content determination per AOAC 950.46 or ASTM D2231.
• Calibration verification of pipettes and volumetric glassware using water density correction.
• Student laboratory instruction in analytical chemistry, materials science, and food technology curricula.
• Inventory management of high-value consumables (e.g., catalysts, isotopic tracers) where ±0.001 g resolution suffices for reconciliation.

FAQ

Is the GF-603A suitable for ISO 17025 accredited testing?
Yes—provided it is calibrated with traceable standards, maintained per manufacturer guidelines, and verified at defined intervals per your lab’s uncertainty budget. Its repeatability and readability meet minimum criteria for many Category II test methods.
Does it support internal calibration?
No—the GF-603A requires external calibration using certified weights. Internal motorized calibration is not implemented in this model series.
Can it be used in a fume hood?
Yes, but ensure stable ambient temperature (15–30 °C), minimal air currents, and level installation. Avoid placement near exhaust slots or doors subject to frequent opening.
What is the warranty period?
Standard manufacturer warranty is 2 years from date of shipment, covering parts and labor for defects in materials and workmanship under normal laboratory use.
Is RS-232 cable included?
No—RS-232 connectivity requires a standard 9-pin null-modem cable (DB9 male-to-female), which must be sourced separately or specified at time of order.