Yoke SY-C Series 1 mg Precision Analytical Balance

Overview

The Yoke SY-C Series 1 mg Precision Analytical Balance is an entry-level yet rigorously engineered laboratory balance designed for routine quantitative weighing tasks in quality control labs, educational institutions, pharmaceutical QC environments, and R&D settings where sub-milligram resolution is required but full analytical-grade performance (e.g., 0.1 mg readability or draft shield certification per OIML R76) is not mandated. Operating on electromagnetic force compensation principle, the SY-C series delivers stable, drift-compensated mass measurements across its 200 g to 500 g capacity range with consistent 1 mg readability. Its robust mechanical architecture—featuring a stainless-steel weighing pan, metal base, removable glass draft shield, and modular isolation of sensor, digital processing (CPU), and display circuitry—minimizes thermal, electrostatic, and mechanical cross-talk, thereby supporting reliable daily operation under non-classified ambient lab conditions (ISO 14644 Class 8 or better recommended).

Key Features

• High-contrast 5.6-inch TFT color display (262,144 colors) with intuitive graphical user interface supporting multi-language operation (English, Spanish, French, German, Chinese)
• Internal automatic calibration system activated via front-panel key or scheduled timing—no external weights required for routine verification
• Electromagnetic force restoration sensor with stainless-steel pan and rigid aluminum alloy housing for long-term stability and corrosion resistance
• Modular mechanical design: fully isolated sensor chamber, CPU board, and display unit to suppress interference from vibration, airflow, or EMI
• Dual communication interfaces—standard RS232 and USB—for seamless integration with LIMS, ELN, or custom data acquisition systems
• Built-in data storage (up to 1,000 records) with time-stamped entries, user ID tagging, and password-protected multi-user access control

Sample Compatibility & Compliance

The SY-C series accommodates solid, granular, and low-viscosity liquid samples within standard laboratory containers (e.g., weighing boats, vials, beakers). The removable glass draft shield ensures adequate air stability for most non-hygroscopic or low-volatility materials. While not certified to OIML R76 or ASTM E2244 for legal-for-trade use, the balance meets general laboratory requirements under ISO/IEC 17025 for traceable calibration and documented uncertainty budgets when used with NIST-traceable reference weights. Internal calibration conforms to manufacturer-defined repeatability and linearity specifications (±1 mg repeatability, ≤0.02% linearity error across full scale). The device supports GLP-compliant workflows through audit-trail-enabled software logging and user authentication.

Software & Data Management

The included SUPERTEXT 1.0 PC software enables bidirectional communication via RS232 or USB, supporting real-time data streaming, batch export (CSV/Excel), and automated report generation. Preconfigured application modes include animal weighing, density determination (with auxiliary kit), percentage weighing, parts counting, checkweighing, formulation weighing, and target-based dosing—all compliant with basic GMP documentation expectations. All operations are timestamped and associated with logged-in user IDs; data files retain metadata including calibration history, environmental logs (if connected to optional temp/humidity sensor), and instrument firmware version. Software supports FDA 21 CFR Part 11–aligned features including electronic signatures, role-based permissions, and immutable audit trails when deployed on validated Windows OS platforms.

Applications

• Raw material and intermediate weight verification in pharmaceutical manufacturing (non-sterile API handling)
• Standard preparation and dilution in clinical chemistry and microbiology labs
• Quality assurance testing of excipients, tablets, and capsules per USP & Ph. Eur. general chapters
• Teaching laboratories for fundamental metrology principles and uncertainty analysis exercises
• Environmental sample preparation (soil, sediment, filter weights) prior to ICP-MS or GC-MS analysis
• Formulation development in food science, cosmetics, and polymer research requiring repeatable 1 mg resolution

FAQ

What is the maximum permissible error (MPE) specification for the SY-C series?
Per manufacturer documentation, MPE is ±2 mg at full scale (500 g), aligned with Class II accuracy per EN 45501 (formerly OIML R76-1 Annex C).
Does the balance support external calibration with third-party weights?
Yes—external calibration mode is accessible via service menu; however, internal calibration remains the default and recommended method for routine use.
Is the draft shield certified for static dissipation?
No—the glass shield is standard float glass without anti-static coating; users handling electrostatic-sensitive powders should implement grounding protocols.
Can the balance be integrated into a networked LIMS environment?
Yes—via RS232-to-Ethernet or USB-to-serial gateways; SUPERTEXT 1.0 includes COM port emulation and configurable data packet formatting.
What is the warm-up time required before first use?
Minimum 30 minutes at stable ambient temperature (20–25 °C, <60% RH) is recommended to achieve thermal equilibrium and optimal repeatability.