SHYP JA21002 Precision Balance

Overview

The SHYP JA21002 Precision Balance is an entry-level laboratory balance engineered for reproducible mass measurement in quality control, educational labs, and routine analytical environments. It operates on electromagnetic force compensation (EMFC) principle—where the load-induced displacement of the weighing pan is counteracted by a precisely regulated electromagnetic current, enabling high linearity and minimal drift over time. With a maximum capacity of 2100 g and readability of 10 mg (0.01 g), it meets the performance requirements for Class II precision balances per OIML R76 and ASTM E898-22 standards. Its robust mechanical architecture—including shock-absorbing feet, draft shield compatibility (optional), and sealed load cell housing—ensures operational stability under non-climate-controlled conditions typical of industrial QC labs or teaching facilities.

Key Features

• Electromagnetic force compensation (EMFC) sensor technology for high repeatability and long-term calibration stability
• External calibration capability using certified weights (e.g., Class M2 or better), supporting traceable metrology workflows
• RS232C serial interface compliant with EIA/TIA-232-F standard, enabling direct connection to PCs, label printers, or LIMS without additional adapters
• Integrated functions including piece counting (PCS), unit conversion (carat, troy ounce, grain), auto-zero tracking, full-range tare, and dynamic stability indicator
• Large-diameter stainless steel weighing pan (Φ160 mm) optimized for voluminous or irregular samples; removable for cleaning
• Backlit LCD display with 18-mm digit height for clear readability under varied ambient lighting
• Auto-power-off and keypad lock features to conserve energy and prevent accidental parameter changes

Sample Compatibility & Compliance

The JA21002 accommodates solid, granular, and low-viscosity liquid samples within its 2100 g capacity limit. Its open-frame design allows flexibility in sample placement, while optional draft shields (sold separately) mitigate air-current interference during microgram-sensitive operations. The balance conforms to ISO 9001-certified production protocols at SHYP’s Shanghai facility. Though not inherently 21 CFR Part 11–compliant (as it lacks electronic audit trail functionality), its RS232 output supports integration into validated systems when paired with compliant data acquisition software. It satisfies general-purpose requirements outlined in USP , ISO/IEC 17025:2017 (clause 6.4.3 on equipment suitability), and GLP Annex 4 guidelines for non-critical weighing tasks.

Software & Data Management

Data export is enabled via ASCII-based RS232 protocol using standard baud rates (9600, 19200, or 38400 bps). Output format is configurable (e.g., “S” for stable weight, “W” for weight value only) and compatible with common spreadsheet applications, LabArchives, and custom Python/Node.js scripts. No proprietary driver installation is required—Windows, macOS, and Linux systems recognize the device as a virtual COM port. For regulated environments, users may implement third-party validation packages (e.g., Veeam Validation Suite or LabWare LIMS) to document data integrity, transmission latency, and error-handling behavior during transfer.

Applications

• Raw material verification and batch release testing in pharmaceutical excipient and nutraceutical manufacturing
• Formulation preparation in chemistry teaching labs (e.g., molar mass calculations, dilution series)
• Inventory management and component counting in electronics assembly and hardware distribution centers
• Soil and aggregate sampling in civil engineering field labs where portability and ruggedness are prioritized over sub-milligram resolution
• Calibration verification of lower-tier scales using reference weights in metrology support roles

FAQ

What calibration weights are recommended for the JA21002?
Class M2 or better certified weights (e.g., 2000 g + 100 g combination set) are advised for external calibration per ISO/IEC 17025 requirements.
Can this balance be used in a fume hood?
Yes—provided ambient temperature remains between 10–30 °C and relative humidity stays below 80% RH non-condensing; avoid direct airflow onto the pan.
Is internal calibration available?
No—the JA21002 relies exclusively on external calibration; models with internal motorized calibration (e.g., SHYP FA series) require separate specification.
Does the RS232 interface support bi-directional communication?
No—it is transmit-only; commands such as tare or print cannot be sent from PC to balance.
What is the warm-up time before first use?
Minimum 30 minutes at stable room temperature is recommended to achieve thermal equilibrium of the EMFC sensor and minimize zero drift.