AND GF-3002A Precision Top-Loading Balance
| Brand | AND/A&D |
|---|---|
| Origin | Japan |
| Model | GF-3002A |
| Type | Precision Balance |
| Maximum Capacity | 3200 g |
| Readability | 0.01 g |
| Repeatability | 0.01 g |
| Calibration | External |
| Weighing Pan Size | 165 × 165 mm |
| Dimensions (W×D×H) | 212 × 317 × 93 mm |
| Stabilization Time | ~1.0 s (at 50 g load) |
| Compliance | ISO 9001, JIS B 7721, ASTM E898 |
Overview
The AND GF-3002A Precision Top-Loading Balance is an engineered metrological instrument designed for routine quantitative mass measurement in quality control laboratories, academic research settings, and industrial production environments. Operating on electromagnetic force compensation (EMFC) principle, it delivers high reproducibility and long-term stability under variable ambient conditions. With a maximum capacity of 3200 g and readability of 0.01 g, the GF-3002A bridges the performance gap between analytical balances and heavy-duty platform scales—offering laboratory-grade precision without requiring vibration-isolated benches or draft enclosures. Its compact low-profile chassis (93 mm height) and wide 165 × 165 mm stainless-steel weighing pan accommodate voluminous samples—including beakers, flasks, and composite materials—while maintaining consistent thermal equilibrium and minimizing air current interference.
Key Features
- Electromagnetic force compensation transducer with auto-zero tracking and drift compensation algorithms
- External calibration capability using certified Class M2 weights (recommended: 2000 g or 3000 g standard)
- Real-time digital filtering with adjustable response time (Fast/Standard/Slow modes) to optimize stability vs. speed trade-off
- Integrated overload protection up to 150% of rated capacity (4800 g), safeguarding the load cell from mechanical shock
- Backlit LCD display with 20 mm digit height and dual-unit readout (g, oz, ct, dwt, grain, %, pcs)
- RS-232 interface compliant with standard ASCII protocol for direct connection to LIMS, Excel, or statistical process control (SPC) software
- IP54-rated enclosure against dust ingress and incidental water splashes during cleaning or humid operation
Sample Compatibility & Compliance
The GF-3002A supports heterogeneous sample types including powders, granules, liquids in containers, pre-weighed vials, and small mechanical assemblies. Its large pan surface enables uniform load distribution, reducing edge-loading error per OIML R 76-1 Annex C guidelines. The balance meets Japanese Industrial Standard JIS B 7721:2018 (equivalent to ISO 9001 traceable manufacturing), and its metrological performance complies with OIML R 76 Class II requirements for precision balances. It is routinely deployed in GLP-compliant environments where audit trails are maintained via external data logging; while the unit itself does not include built-in 21 CFR Part 11 electronic signature functionality, its RS-232 output supports integration with validated third-party data acquisition systems meeting FDA regulatory expectations.
Software & Data Management
Data export is performed via ASCII-formatted serial transmission at 9600 bps (8N1), supporting both single-read and continuous streaming modes. The balance outputs timestamped values (when paired with compatible host software), gross/net/tare status flags, and stability indicators. Optional AND WinCT software (v4.x) provides real-time graphing, statistical analysis (mean, SD, CV%), and automated report generation in PDF or CSV format. All raw data files retain unaltered timestamps and operator IDs when integrated into enterprise LIMS platforms—ensuring full traceability required under ISO/IEC 17025 accreditation protocols.
Applications
- Raw material verification in pharmaceutical excipient blending (per USP & EP monographs)
- Batch weight consistency checks in food processing and nutraceutical manufacturing
- Calibration reference mass handling in metrology labs prior to transfer to higher-class standards
- Sample preparation for ICP-MS, XRF, and TGA—where sub-10 mg repeatability is critical across multi-gram loads
- Teaching laboratories for fundamental gravimetric analysis, stoichiometry experiments, and uncertainty budgeting exercises
- Environmental testing labs performing soil moisture content determination by loss-on-drying (ASTM D2216)
FAQ
What calibration weights are recommended for the GF-3002A?
Class M2 stainless-steel weights conforming to ISO 9001 and OIML R 111 are recommended; a 2000 g or 3000 g weight is optimal for full-span verification.
Does the GF-3002A support internal calibration?
No—it is externally calibrated only, which enhances long-term linearity stability and simplifies maintenance in regulated environments.
Can this balance be used in a fume hood?
Yes, provided airflow velocity remains below 0.2 m/s at the pan surface and temperature gradients are minimized; the low-profile design minimizes turbulence sensitivity.
Is the RS-232 interface opto-isolated?
No—the interface is electrically isolated via galvanic separation within the internal power supply architecture, meeting IEC 61000-4-5 surge immunity requirements.
What is the warm-up time before first use?
Minimum 30 minutes at stable ambient temperature (20–25 °C) is required to achieve thermal equilibrium of the EMFC sensor and internal reference circuitry.
