Yoke GT Series Touchscreen Precision Balance

Overview

The Yoke GT Series Touchscreen Precision Balance is a Class II-certified analytical-grade weighing instrument engineered for high reproducibility and long-term stability in laboratory, quality control, and educational environments. Utilizing electromagnetic force compensation (EMFC) sensor technology—fabricated with CNC-machined high-precision components—the balance delivers consistent 1 mg readability across its full capacity range (up to 500 g). Its core architecture integrates an ARM32-bit microprocessor and advanced digital filtering algorithms to optimize dynamic response time and minimize environmental drift, ensuring reliable measurements under variable ambient conditions. Designed in compliance with international metrological standards—including OIML R 76-1 and ISO 9001—this balance supports traceable calibration via external weights and meets the fundamental requirements for GLP-compliant documentation workflows.

Key Features

• Electromagnetic force compensation (EMFC) transducer system with CNC-fabricated sensor assemblies for enhanced linearity and thermal stability
• ARM32-bit embedded processor enabling real-time data processing, rapid stabilization (< 2 s typical), and low-noise signal acquisition
• Backlit BTN black-matrix LCD display with white LED backlighting—optimized for legibility under low-light or high-glare lab conditions
• Integrated multi-function operating modes: counting, checkweighing, density determination (with optional density kit), and animal/dynamic weighing
• Sealed draft shield design with ergonomic front-access door—minimizes air current interference while maintaining operator convenience
• SMT (Surface Mount Technology) PCB assembly—improves circuit reliability, thermal management, and resistance to mechanical shock
• External calibration capability with user-selectable calibration weight (100 g to 500 g, depending on model)—fully compliant with ISO/IEC 17025 verification protocols

Sample Compatibility & Compliance

The GT Series accommodates a broad range of sample types—from powders and granules to small solid components and pre-weighed vials—within its 90 mm diameter stainless steel weighing pan. Its sealed enclosure ensures measurement integrity when handling hygroscopic, volatile, or static-prone materials. All models conform to OIML R 76-1 Class II accuracy specifications, with maximum permissible errors defined per load segment (±0.5e up to 50 g; ±1.0e from 50–200 g; ±1.5e above 200 g). The balance’s construction and firmware support audit-ready operation in regulated environments: it enables manual calibration logging, permits user-defined tare memory, and maintains stable zero-tracking during extended use—key prerequisites for FDA 21 CFR Part 11-aligned QC laboratories adhering to GMP/GLP principles.

Software & Data Management

While the GT Series operates as a standalone instrument without proprietary PC software, it features a fully configurable RS232 serial interface (standard) for seamless integration into LIMS, ELN, or custom data acquisition systems. All weighing events—including gross, net, tare, and unit count values—are transmitted in ASCII format with configurable delimiters and termination characters. Timestamps are generated by the host system; internal clock functionality is not implemented. For regulatory applications, users may implement external validation protocols to verify data integrity, transmission fidelity, and error-handling behavior—consistent with ISO/IEC 17025 clause 5.9 and ASTM E2500-13 guidance on instrument qualification.

Applications

• Pharmaceutical formulation: active pharmaceutical ingredient (API) dispensing, excipient blending, and tablet weight uniformity testing per USP <41>
• Chemical synthesis: stoichiometric reagent weighing, catalyst dosing, and reaction yield quantification
• Materials science: powder density analysis, coating mass verification, and composite material batch consistency checks
• Food & beverage QA: portion control validation, nutritional labeling compliance, and raw material acceptance testing
• Academic teaching labs: introductory metrology instruction, uncertainty propagation exercises, and calibration technique demonstrations

FAQ

What calibration weights are required for each GT model?
GT103/GT123 require a 100 g Class M2 or better external weight; GT203/GT263 require 200 g; GT303 requires 300 g; GT503 requires 500 g. All weights must be certified and accompanied by a valid calibration certificate.

Is internal calibration available?
No. The GT Series supports external calibration only, in accordance with OIML R 76-1 requirements for Class II balances used in non-automatic weighing applications.

Can the balance be connected to a printer or computer?
Yes—via standard RS232 interface. No USB or Ethernet ports are provided. Compatible with most serial printers and data loggers using ASCII protocol.

Does the balance meet ISO/IEC 17025 requirements for accredited testing labs?
When operated with documented procedures, traceable standards, and appropriate environmental controls, the GT Series satisfies metrological requirements for routine calibration verification and intermediate checks—but full accreditation requires lab-specific validation per ISO/IEC 17025 clause 6.4.

What is the temperature operating range?
10–30 °C, with relative humidity ≤ 80 % RH (non-condensing). Performance specifications assume thermal equilibrium after 30 minutes of warm-up time.