Yoke SY503 Precision Touchscreen Balance

Overview

The Yoke SY503 Precision Touchscreen Balance is an entry-level analytical-grade instrument engineered for reproducible mass measurement in laboratory, quality control, and educational environments. Based on electromagnetic force compensation (EMFC) transduction technology, it delivers stable, drift-resistant performance across ambient temperature fluctuations typical of non-climate-controlled labs. With a maximum capacity of 500 g and readability of 1 mg (0.001 g), the SY503 meets the specification threshold for Class II precision balances per OIML R76 and ASTM E898–22 standards. Its modular architecture isolates critical subsystems—display electronics, digital signal processing, and mechanical load cell—to minimize thermal crosstalk and electromagnetic interference, ensuring long-term stability without requiring frequent recalibration.

Key Features

• 5.6-inch high-resolution TFT color touchscreen (262,144 colors) with intuitive graphical user interface supporting multi-language operation (English, Spanish, French, German, Chinese)
• Electromagnetic force compensation (EMFC) sensor system with stainless steel weighing pan (90 mm diameter) and removable tempered glass draft shield for enhanced environmental isolation
• Physically segregated internal architecture: independent PCBs for display, CPU-based data acquisition, and analog sensor signal conditioning—reducing thermal and electrical coupling
• Dual communication interfaces: RS232 (3-wire, TTL-level compatible) and USB 2.0 (virtual COM port mode), enabling direct integration with LIMS, ELN, or custom QA/QC software platforms
• Onboard memory stores up to 1,000 measurement records with timestamp, operator ID, and balance status flags; supports multi-user login with password-protected access levels
• External calibration via certified weights (not included); calibration log automatically archived with date, time, weight value, and operator ID

Sample Compatibility & Compliance

The SY503 accommodates solid, granular, and low-viscosity liquid samples within standard laboratory containers (e.g., beakers, weighing boats, crucibles). Its 90 mm stainless steel pan and open-top design allow compatibility with volumetric flasks up to 250 mL and standard desiccators. The removable glass draft shield ensures minimal airflow disturbance during sensitive measurements while permitting rapid sample exchange. The balance complies with ISO 9001:2015 process control requirements and supports traceable documentation under GLP and GMP frameworks. While not FDA 21 CFR Part 11–certified out-of-the-box, its SUPERTEXT 1.0 software provides configurable audit trail logging—including user actions, parameter changes, and calibration events—enabling validation by end users per internal SOPs.

Software & Data Management

SUPERTEXT 1.0 is a Windows-based PC application that establishes bidirectional communication with the SY503 via RS232 or USB. It enables real-time data streaming, batch export to CSV/Excel, and automated report generation compliant with ISO/IEC 17025 documentation guidelines. Functional modules include animal weighing (tare stabilization for live specimens), density determination (using auxiliary sinker kit), formulation weighing (multi-step ingredient addition with tolerance alerts), accumulation (summing sequential weighings), checkweighing (pass/fail binning against preset limits), percentage weighing (relative to reference mass), piece counting (average piece weight calculation), and target weighing (guided dispensing to predefined mass). All operations generate timestamped metadata suitable for electronic record retention.

Applications

The SY503 serves as a primary mass measurement tool in pharmaceutical QC labs for raw material verification and tablet weight uniformity testing per USP ; in food safety laboratories for moisture content analysis (gravimetric loss-on-drying); in academic chemistry teaching labs for stoichiometric reagent preparation; and in materials science facilities for powder blending consistency checks. Its robust construction and external calibration protocol make it suitable for routine use in production environments where ISO/IEC 17025 traceability and daily verification are mandated but full metrological certification is not required.

FAQ

What calibration weights are required for the SY503?
A certified 500 g Class M2 or better weight is recommended for full-span verification; 100 g and 200 g weights may be used for intermediate checks.
Does the SY503 support internal calibration?
No—the SY503 uses external calibration only; no motorized internal weight mechanism is installed.
Can the balance operate without connection to a PC?
Yes—all core weighing functions—including tare, unit conversion, and built-in applications—are fully operational standalone.
Is the glass draft shield included with the instrument?
Yes—removable tempered glass draft shield and plastic dust cover are supplied as standard accessories.
What is the warm-up time before first use?
Minimum 30 minutes at stable ambient temperature (20 ± 5 °C) is recommended to achieve thermal equilibrium across sensor and electronics modules.