AND GF-1003A Precision Top-Loading Balance

Overview

The AND GF-1003A is a high-reliability top-loading precision balance engineered for consistent mass measurement in quality control laboratories, academic research settings, and industrial R&D environments. Designed according to fundamental principles of electromagnetic force compensation (EMFC), the GF-1003A delivers stable, drift-compensated readings under ambient laboratory conditions. Its 1100 g maximum capacity and 1 mg readability meet the performance requirements of ISO/IEC 17025-compliant weighing tasks where traceable accuracy and operational robustness are essential. The instrument features an integrated draft shield mount interface (compatible with optional AND DS-100 series shields), enabling rapid adaptation to semi-controlled environments without requiring full enclosure integration.

Key Features

• Electromagnetic force compensation sensor architecture ensuring long-term linearity and minimal zero drift
• High-speed stabilization algorithm—achieving <1.0 s settling time for typical 5 g loads, supporting throughput-intensive workflows
• External calibration capability using certified Class M2 or better weights, fully compliant with ASTM E898 and ISO 9001 calibration traceability protocols
• Stainless steel weighing pan (128 × 128 mm) with corrosion-resistant coating and optimized edge geometry for easy sample containment and cleaning
• Large, high-contrast LCD display with backlight and dual-unit readout (g, oz, ct, dwt, grain, etc.) configurable via front-panel menu
• Integrated RS-232 and optional USB interface for direct data transmission to LIMS, Excel, or statistical process control (SPC) software
• Auto-zero tracking and automatic internal temperature compensation to maintain accuracy across 10–40 °C operating range

Sample Compatibility & Compliance

The GF-1003A accommodates a broad range of solid and granular samples—including powders, tablets, filter papers, crucibles, and small assemblies—within its open-top configuration. Its low-profile design minimizes air current interference while permitting convenient access for pipetting, dispensing, or manual placement. The balance conforms to international regulatory expectations for non-automatic weighing instruments per OIML R 76-1 (2021 edition) and satisfies functional prerequisites for GLP and GMP environments when operated within documented SOPs. It supports audit-ready operation through user-accessible calibration logs, date/time-stamped weight records (when connected to compatible software), and password-protected configuration menus.

Software & Data Management

Data output is natively supported via ASCII protocol over RS-232, enabling seamless integration with third-party laboratory informatics systems. When used with AND’s optional WinCT-Balance software (v4.0+), users gain access to real-time data logging, statistical analysis (mean, SD, CV%, min/max), trend charting, and customizable report generation—including PDF export with embedded metadata (operator ID, timestamp, calibration status). The software complies with FDA 21 CFR Part 11 requirements for electronic records when deployed with appropriate system validation and access controls. All communication events—including weight triggers, calibration initiations, and error codes—are timestamped and stored locally on the host PC for audit trail reconstruction.

Applications

• Quantitative formulation and batch release testing in pharmaceutical manufacturing (e.g., active ingredient dosing, excipient blending verification)
• Gravimetric analysis in analytical chemistry labs, including moisture content determination (ASTM D2231), ash residue quantification (ISO 2171), and filterable particulate mass assessment
• Material science applications such as density calculation of composite powders, catalyst loading verification, and electrode coating mass uniformity checks
• Educational use in undergraduate physics and chemistry curricula for teaching measurement uncertainty, repeatability assessment, and calibration hierarchy concepts
• Quality assurance workflows in food processing, cosmetics, and fine chemical production where 0.1% relative uncertainty at 1 g load is required

FAQ

What calibration weights are recommended for the GF-1003A?
Class M2 stainless steel weights certified to ISO/IEC 17025 are recommended for routine external calibration. A 1000 g M2 weight with ±0.30 mg maximum permissible error is optimal for full-span verification.
Does the GF-1003A support internal calibration?
No—the GF-1003A is externally calibrated only. Internal motorized calibration is not implemented in this model; it relies on user-performed external calibration for metrological integrity.
Can the balance be used in a fume hood?
Yes—provided the fume hood is operating at minimal airflow (<0.5 m/s at pan level) and the unit is mounted on a vibration-isolated surface. Optional draft shields (e.g., DS-100) are strongly advised in such environments.
Is the RS-232 interface opto-isolated?
Yes—the RS-232 port includes galvanic isolation to prevent ground-loop interference in electrically noisy production lab environments.
What is the warm-up time required before first use?
A minimum 30-minute thermal stabilization period is recommended after power-on to ensure sensor thermal equilibrium and optimal repeatability performance.