Yoke SY304C Touchscreen Analytical Balance

Overview

The Yoke SY304C Touchscreen Analytical Balance is an ISO/IEC 17025-aligned precision mass measurement instrument engineered for laboratory environments requiring high repeatability, traceable calibration, and regulatory-compliant data handling. Based on electromagnetic force compensation (EMFC) transduction technology, it delivers stable, drift-resistant measurements under variable ambient conditions. With a maximum capacity of 300 g and readability of 0.1 mg (100 µg), the SY304C meets the performance criteria defined in ASTM E898–22 and ISO 9001:2015 for analytical balance validation. Its fully isolated architecture—mechanically separating the sensor module, digital processing unit, and display circuitry—ensures minimal thermal and electromagnetic coupling, directly contributing to long-term stability and measurement integrity.

Key Features

• 5.6-inch high-resolution TFT color touchscreen (262,144 colors) with intuitive graphical interface supporting multi-language operation (English, Spanish, French, German, Chinese)
• Internal motorized calibration system compliant with ISO 17025 metrological traceability requirements; automatic recalibration triggered by temperature drift or time interval
• Modular mechanical design: corrosion-resistant stainless steel weighing pan (90 mm diameter), removable tempered-glass draft shield, and integrated plastic dust cover for routine protection
• Dual communication interfaces—RS232 (standard) and USB (device mode)—enabling direct connection to laboratory PCs without external adapters
• Electrical isolation architecture: physically segregated sensor electronics, CPU board, and display driver circuits reduce signal noise and improve measurement reproducibility
• Onboard non-volatile memory stores up to 1,000 measurement records with timestamp, operator ID, and environmental metadata (optional external temperature/humidity sensor integration)

Sample Compatibility & Compliance

The SY304C accommodates standard laboratory sample containers—including weighing boats, crucibles, vials, and petri dishes—within its 90 mm diameter stainless steel pan. The removable glass draft shield ensures compatibility with volatile, hygroscopic, or static-prone samples while maintaining Class II environmental classification per ISO 14644-1 (cleanroom-grade particulate control). The balance conforms to EN 45501:2015 (previously OIML R76) for legal-for-trade applications where applicable, and its firmware supports audit trail generation required under FDA 21 CFR Part 11 for electronic records in regulated pharmaceutical and clinical research settings. Routine verification protocols align with USP and EP 2.1.6 guidelines for analytical balance qualification.

Software & Data Management

The included SUPERTEXT 1.0 software suite provides full bidirectional control and data export functionality via RS232 or USB. It enables automated report generation compliant with GLP documentation standards—including operator authentication, instrument ID, calibration history, and raw measurement logs. All weighing modes—including density determination (with auxiliary density kit), formulation batching, piece counting (with statistical uncertainty estimation), and dynamic checkweighing—are configurable with user-defined tolerances and pass/fail logic. Data exports support CSV, TXT, and XML formats; optional Excel add-in allows real-time charting and statistical process control (SPC) analysis. Audit trails record all parameter changes, calibration events, and user logins with immutable timestamps.

Applications

This analytical balance serves critical roles across quality control laboratories, academic research facilities, and GMP manufacturing sites. Typical use cases include quantitative gravimetric analysis in HPLC sample preparation, active pharmaceutical ingredient (API) dispensing, catalyst loading in catalysis studies, polymer blend ratio verification, and reference standard preparation for calibration labs. Its internal calibration and environmental compensation algorithms make it suitable for installations in non-climate-controlled areas where short-term temperature fluctuations occur. The multi-user management system supports role-based access control—essential for shared instrumentation in university core facilities or contract testing laboratories.

FAQ

What is the recommended calibration frequency for the SY304C in a GLP environment?
Calibration should be performed at startup, after relocation, following significant environmental shifts (>5 °C), and at predefined intervals (e.g., daily pre-use verification with certified weights per SOP). Internal calibration satisfies intermediate checks; external verification with traceable standards is required weekly or per risk assessment.
Does the SY304C support network connectivity or Ethernet output?
No—only RS232 and USB interfaces are provided. For networked deployment, a serial-to-Ethernet converter or PC-based data aggregation server is required.
Can the SUPERTEXT 1.0 software generate PDF reports with digital signatures?
Yes—when deployed on Windows systems with compatible certificate infrastructure, it supports digitally signed PDF exports meeting Annex 11 and ALCOA+ data integrity principles.
Is the glass draft shield autoclavable?
No—the tempered glass shield is not designed for autoclaving; cleaning is recommended with isopropyl alcohol and lint-free wipes.
What environmental conditions are specified for optimal performance?
Operating range: 10–30 °C, ≤80% RH (non-condensing); installation requires vibration-dampened benchtop, away from HVAC vents, centrifuges, or magnetic sources.