A&D GF-8K Precision Industrial Balance

Overview

The A&D GF-8K Precision Industrial Balance is an engineered solution for high-reliability mass measurement in demanding production, quality control, and laboratory environments. Utilizing A&D’s proprietary SHS (Super Hybrid Sensor) electromagnetic force compensation technology, the GF-8K delivers rapid stabilization—achieving full-scale equilibrium in ≤1.5 seconds—without mechanical wear or drift-prone load cell degradation. Unlike strain-gauge-based systems, the SHS sensor operates on closed-loop electromagnetic feedback, ensuring long-term linearity, thermal stability, and immunity to shock-induced zero shifts. Designed for continuous operation under industrial conditions, the GF-8K meets IP65 ingress protection standards (dust-tight and resistant to low-pressure water jets), enabling safe deployment in workshops, cleanrooms, packaging lines, and raw material receiving areas where humidity, particulate contamination, or incidental splashing may occur.

Key Features

• SHS electromagnetic force restoration sensor with ≤1.5 s stabilization time and 0.001 g readability across its 8,000 g capacity range
• Internal calibration system with motor-driven built-in reference mass; automatic recalibration triggered by time interval, temperature shift (>1.5 °C), or user command
• IP65-rated die-cast aluminum housing with sealed keypad and reinforced pan support structure
• High-brightness fluorescent display (18 mm digit height) visible under low-light or ambient glare conditions
• Comprehensive application modes: counting (with ACAI auto-counting accuracy improvement), percentage weighing, checkweighing with configurable upper/middle/lower limits, animal/dynamic weighing, and net/gross/tare management
• User-definable balance ID code stored in non-volatile memory—retained during power loss and required for GLP-compliant audit trails
• Integrated data storage: 40 weight records, 20 unit weight values (for counting), 20 comparator thresholds, and 20 tare values—all timestamped and retrievable via RS-232C
• Auto-power-on at scheduled time and auto-power-off after programmable idle duration (1–60 min)
• Real-time environmental adaptation algorithm compensates for minor air density fluctuations and thermal gradients affecting buoyancy correction

Sample Compatibility & Compliance

The GF-8K accommodates samples up to 8,000 g on a 220 × 280 mm stainless-steel weighing pan, compatible with standard lab containers, industrial bins, and irregularly shaped parts when used with optional draft shields or vibration isolation tables. Its metrological performance conforms to OIML R76-1 (2021) Class II requirements for precision balances and satisfies critical regulatory mandates including FDA 21 CFR Part 11 (via WinCT software audit trail functionality), ISO/IEC 17025:2017 clause 6.4.6 (equipment verification), USP repeatability and sensitivity criteria, and EU GMP Annex 11 (computerized system validation). All factory calibrations are traceable to NMIJ (National Metrology Institute of Japan) standards, with certificate of conformance supplied.

Software & Data Management

WinCT v3.x software—supplied on CD-ROM and compatible with Windows 10/11 (64-bit)—provides full bidirectional communication via RS-232C. It enables automated data logging with user authentication, electronic signature capture, customizable report templates (PDF/CSV/XLSX), and real-time SPC charting (X-bar/R, Cp/Cpk). Audit trail logs record every calibration event, parameter change, ID modification, and data export—including operator name, timestamp, and source IP (when network-enabled via optional converter). Data integrity safeguards include write-protection, tamper-evident file hashing, and optional integration with LIMS or MES platforms via ASCII protocol scripting.

Applications

The GF-8K serves as a primary weighing instrument in pharmaceutical QC labs for active ingredient dispensing and blend uniformity testing; in automotive Tier-1 suppliers for component weight verification against PPAP submission criteria; in food processing facilities for batch ingredient dosing per HACCP plans; and in metallurgical QA departments for alloy sample preparation prior to ICP-OES analysis. Its robustness supports extended-shift use in warehouse receiving bays verifying incoming raw material lot weights against purchase orders, while its GLP-ready configuration ensures compliance during FDA pre-approval inspections or ISO 13485 audits.

FAQ

Does the GF-8K support external calibration with user-provided weights?
No—the GF-8K features internal calibration only. External calibration is not supported due to its sealed SHS architecture and OIML-mandated verification methodology.
Is WinCT software validated for 21 CFR Part 11 compliance?
Yes—WinCT v3.x includes electronic signatures, role-based access control, and immutable audit trails meeting all technical and procedural requirements of 21 CFR Part 11 Subpart B.
Can the GF-8K be integrated into a networked environment?
Direct Ethernet/Wi-Fi is not built-in, but RS-232C output can be bridged to TCP/IP networks using certified serial-to-Ethernet converters (e.g., Moxa NPort series) with WinCT-compatible drivers.
What is the warranty coverage and service support structure?
A&D provides a 24-month limited warranty covering parts and labor, backed by authorized service centers in North America, EMEA, and APAC regions with certified metrologists and NIST-traceable calibration equipment.
How does the ACAI function improve counting accuracy?
ACAI (Automatic Counting Accuracy Improvement) dynamically adjusts sample weight averaging based on statistical variance across multiple test counts, reducing error propagation from particle size distribution heterogeneity—particularly effective for small fasteners, tablets, or granular chemicals.