A&D FX-1200CT Jewelry and Precious Metals Precision Balance

Overview

The A&D FX-1200CT is a high-precision jewelry balance engineered specifically for gemological laboratories, precious metal refineries, and certified appraisal facilities where trace-level mass quantification of diamonds, gold alloys, platinum, and other high-value commodities is mission-critical. Operating on electromagnetic force compensation (EMFC) principle, the FX-1200CT delivers metrologically traceable measurements compliant with OIML R76-1 Class I requirements for precision balances. Its core sensing architecture integrates A&D’s proprietary C-SHS (Compact Super High-Speed) micro-sensor technology — a monolithic load cell design optimized for minimal thermal drift, mechanical hysteresis, and air-current susceptibility. The instrument achieves full stability in ≤2 seconds under standard laboratory conditions (20–25°C, <60% RH, no drafts), enabling high-throughput verification workflows without compromising measurement integrity. Designed for ISO/IEC 17025-accredited environments, the FX-1200CT supports documented calibration traceability to NIST or JCSS-certified standards via external calibration weights.

Key Features

• Ultra-low readability of 0.001 carat (0.1 mg) across its full 1260 ct (252 g) capacity range — meeting ASTM E1157 and USP <41> requirements for analytical weighing of fine jewelry components.
• Removable, oversized draft shield with conductive anti-static coating (surface resistivity <10⁹ Ω/sq), mitigating electrostatic interference from gemstone handling and synthetic fiber garments.
• Backlit, high-contrast LCD display with 18-mm digit height and intuitive icon-based status indicators — optimized for extended visual acuity during prolonged inspection cycles.
• ACAI (Automatic Counting Accuracy Improvement) algorithm dynamically compensates for sample density variation and container tare drift during piece-counting operations (e.g., calibrated diamond lots).
• Modular connectivity architecture: RS-232C (standard), optional USB 2.0 (FXi-02, driver-free HID-class enumeration), Ethernet (WINCT-Plus, supporting up to 32 concurrent balances with centralized data logging), and rechargeable Li-ion battery pack (FXi-09, 14 h runtime after 10 h charge).
• One-touch auto-calibration (FZ-CT variant); FX-1200CT supports scheduled external calibration with audit-trail-enabled calibration log export via WINCT-Plus.

Sample Compatibility & Compliance

The FX-1200CT accommodates irregularly shaped samples—including mounted rings, unset faceted stones, granular gold scrap, and alloy ingots—within its unobstructed 160 mm × 160 mm weighing pan area. Its draft shield provides ≥120 mm vertical clearance, permitting safe placement of tall bezel settings or crucibles. All internal surfaces are corrosion-resistant stainless steel (AISI 304), compliant with ISO 8549-2 for balance construction materials. The device meets electromagnetic compatibility (EMC) per IEC 61326-1:2013 and safety standards IEC 61010-1:2010. It supports GLP/GMP-compliant operation through configurable user access levels, electronic signature prompts, and 21 CFR Part 11–ready audit trails when paired with WINCT-Plus software.

Software & Data Management

WINCT-Plus serves as the certified data management platform for the FX-1200CT, providing real-time multi-balance monitoring, automated report generation (PDF/CSV/XLSX), and role-based permission controls. Each weighing event is timestamped, user-ID stamped, and includes metadata such as environmental temperature/humidity (when interfaced with optional AD-1686 sensor), calibration status, and stability confirmation flag. Data exports include full digital signatures compliant with FDA 21 CFR Part 11 Subpart B requirements. For integration into LIMS or ERP systems, the balance supports Modbus TCP and ASCII protocol over Ethernet or RS-232C.

Applications

• Carat-weight certification of loose diamonds and colored gemstones per GIA/IGI grading protocols.
• Fineness verification of gold bullion and recycled scrap (e.g., 24K, 18K, 14K alloys) prior to smelting.
• Quality control of precious metal plating thickness calculations via gravimetric deposition analysis.
• Calibration of master reference weights in secondary metrology labs accredited to ISO/IEC 17025.
• Inventory reconciliation of high-value watch components, platinum watch cases, and palladium catalysts.

FAQ

What is the difference between FX-1200CT and FZ-1200CT?
The FZ-1200CT includes built-in automatic internal calibration; the FX-1200CT requires external calibration weights but offers enhanced modularity for industrial integration.
Is the FX-1200CT suitable for use in cleanrooms?
Yes — its sealed keypad, static-dissipative housing, and absence of vented electronics meet ISO 14644-1 Class 5 requirements when operated with HEPA-filtered airflow.
Does it support direct connection to laboratory information management systems (LIMS)?
Yes — via WINCT-Plus Ethernet interface using configurable ASCII or Modbus TCP output formats.
Can the anti-static draft shield be cleaned with ethanol?
Yes — use 70% isopropyl alcohol or ethanol on lint-free wipes; avoid abrasive cleaners that may degrade the conductive coating.
What environmental conditions are required for optimal performance?
Operating temperature: 10–30°C; humidity: 20–80% RH non-condensing; vibration isolation recommended per ISO 27874.