JA Series Precision Electronic Balance
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | JA Series |
| Pricing | Available Upon Request |
| Capacity Range | 120–4100 g |
| Readability | 0.001 g (models up to 4103) / 0.01 g (models 12002 and above) |
| Repeatability | ≤ ±0.001 g (0.001-g readability models) / ≤ ±0.01 g (0.01-g readability models) |
| Linearity | ≤ ±0.002 g (0.001-g models) / ≤ ±0.02 g (0.01-g models) |
| Pan Diameter | Φ120 mm (JA1203–JA4103) / Φ158 mm (JA12002–JA41002, MP500B, MP1100B) |
Overview
The JA Series Precision Electronic Balance is a rigorously engineered analytical and semi-micro weighing platform designed for laboratories requiring high accuracy, long-term stability, and compliance-ready operation in routine quality control, research, and educational environments. Built upon electromagnetic force compensation (EMFC) technology, each balance delivers consistent mass measurement by precisely balancing the gravitational force of a sample against a calibrated electromagnetic counterforce—ensuring linearity, minimal drift, and immunity to mechanical wear. The series encompasses two distinct readability tiers: 0.001 g (1 mg) resolution for analytical applications (JA1203–JA4103), and 0.01 g (10 mg) resolution for higher-capacity general-purpose and industrial weighing tasks (JA12002–JA41002, MP500B, MP1100B). All units are manufactured to meet ISO 9001-certified production standards and conform to international metrological requirements outlined in OIML R76-1 and EN 45501, supporting traceable calibration and regulatory alignment in GLP, GMP, and ISO/IEC 17025-accredited labs.
Key Features
- Electromagnetic force compensation (EMFC) sensor architecture ensuring zero mechanical hysteresis and superior long-term repeatability
- Dual readability configuration: 1 mg (0.001 g) for precision analytical work; 10 mg (0.01 g) for robust process and formulation weighing
- Stainless steel weighing pan with optimized diameter (Φ120 mm for 1-mg models; Φ158 mm for 10-mg models) to accommodate diverse sample containers and ensure load distribution stability
- Integrated internal calibration system with motorized mass actuation—enabling automated calibration at user-defined intervals or on power-up
- RS232 and optional USB interfaces compliant with standard serial communication protocols (ASCII, Modbus RTU), enabling seamless integration with LIMS, ERP, and electronic lab notebooks
- Backlit LCD display with intuitive icon-driven menu navigation, real-time stability indicator, and overload/underload warnings
- Auto-zero tracking and ambient temperature compensation algorithms to minimize environmental influence on measurement integrity
Sample Compatibility & Compliance
The JA Series accommodates a broad range of sample types—from powders and granules to liquids in tared vessels, small components, and biological specimens—without compromising performance. Its draft shield compatibility (optional accessory) ensures stable readings in non-laminar airflow environments. Each balance is supplied with full documentation including factory calibration certificate (traceable to NIM, China), conformity declaration per EN 45501, and technical specifications aligned with ISO/IEC 17025 clause 5.5.2 for equipment verification. For regulated industries, the balances support audit-trail-enabled data logging when paired with compliant software, meeting foundational expectations of FDA 21 CFR Part 11 (when used with validated third-party data capture systems) and EU Annex 11 principles.
Software & Data Management
Standard RS232 output enables direct connection to PC-based data acquisition tools using generic terminal emulators or custom scripts (e.g., Python pySerial, LabVIEW VIs). Optional Windows-compatible software provides real-time weight streaming, statistical analysis (mean, SD, CV%), batch ID assignment, and export to CSV or Excel formats. All data exports include timestamp, operator ID field (manual entry), balance ID, and environmental metadata (if external sensor inputs are integrated). Audit trail functionality—including user login history, calibration event logs, and parameter change records—is available through validated enterprise-grade laboratory informatics platforms interfacing via ASCII command protocol.
Applications
- Pharmaceutical QC: Active pharmaceutical ingredient (API) dispensing, excipient ratio verification, and tablet weight uniformity testing per USP <41>
- Chemical synthesis: Stoichiometric reagent weighing, catalyst loading, and reaction mixture preparation
- Materials science: Density determination (with pycnometer), powder blend homogeneity assessment, and coating weight analysis
- Food & beverage: Nutritional labeling compliance, moisture content calculation (pre-/post-drying), and portion control validation
- Academic teaching labs: Fundamental gravimetric analysis, molar mass determination, and stoichiometry experiments requiring sub-milligram resolution
- Environmental testing: Filter weight gain analysis for particulate matter (PM2.5/PM10) quantification per EPA Method 201A
FAQ
What calibration standards are supported?
The JA Series supports internal calibration using built-in reference masses traceable to NIM (National Institute of Metrology, China). External calibration with Class E2 or better weights per ISO 9001 and ISO/IEC 17025 is recommended annually or after relocation.
Is the balance compatible with GLP/GMP documentation workflows?
Yes—when used with validated data capture software that enforces electronic signatures, audit trails, and secure storage, the balance meets core GLP/GMP data integrity requirements per ALCOA+ principles.
Can I connect the balance to a networked LIMS?
Direct Ethernet or Wi-Fi connectivity is not embedded; however, RS232-to-Ethernet converters or middleware gateways (e.g., TAPPI, LabVantage integrators) enable reliable LIMS integration using standard ASCII weight commands.
What maintenance is required beyond calibration?
Routine cleaning of the pan and draft shield interior with lint-free cloth and isopropyl alcohol; annual verification of leveling feet and sensor housing integrity by authorized service personnel.
Are replacement parts and service support available internationally?
Distributor-level technical support and spare parts (pan assemblies, draft shields, interface cables) are available globally through authorized partners; firmware updates and diagnostic utilities are provided via secure download portal upon registration.
