Jinghong JA203P Precision Analytical Balance
| Origin | Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | JA203P |
| Price Range | USD 1,400–4,200 |
| Instrument Type | Analytical Balance |
| Maximum Capacity | 200 g |
| Readability | 0.001 g (1 mg) |
| Minimum Weight | 0.003 g |
| Linearity Error | ±0.003 g |
| Stabilization Time | ≤2 s |
| Sensitivity Drift | ±0.005 g |
| Operating Temperature | 17.0–25.5 °C |
| Display Refresh Rate | 0.3 s |
| Tare Range | 0–200 g |
| Calibration Weight | 200 g external standard |
| Weighing Units | g, oz, ct, mg |
| Pan Diameter | Φ110 mm |
| Draft Shield Dimensions | 170 × 190 × 170 mm (W×D×H) |
| External Interface | RS232 |
| Power Supply | AC 220 V ±12 V, 50 Hz, 600 mA |
| Net Weight | 4 kg |
| Gross Weight | 5 kg |
| Packaging Dimensions (Inner) | 315 × 285 × 330 mm |
| Packaging Dimensions (Outer) | 375 × 315 × 385 mm |
Overview
The Jinghong JA203P Precision Analytical Balance is engineered for high-accuracy mass measurement in laboratory environments requiring compliance with ISO/IEC 17025, USP , and ASTM E898 standards. It employs electromagnetic force compensation (EMFC) sensor technology—distinct from strain-gauge-based platforms—to deliver superior linearity, thermal stability, and long-term repeatability across its full 200 g capacity range. Unlike load-cell systems, the EMFC architecture eliminates mechanical hysteresis and creep effects, ensuring consistent 1 mg readability under controlled ambient conditions (17.0–25.5 °C, ≤60% RH). The balance features a monolithic aluminum alloy base and precision-machined weighing pan (Φ110 mm), optimized to minimize vibration coupling and air current interference. Its three-sided sliding glass draft shield (170 × 190 × 170 mm) provides unobstructed visual access while maintaining ISO 17025-compliant environmental isolation during microgram-level operations.
Key Features
- Electromagnetic force compensation (EMFC) transduction system for zero-mechanical-wear, drift-resistant performance
- Internal automatic calibration routine triggered by temperature shift or time interval (user-configurable)
- Five-key intuitive interface (ON/OFF, PRINT, CAL, →0←, TARE) with backlight-enhanced LCD display (high-contrast, 0.3 s refresh rate)
- Real-time overload protection with audible and visual alert prior to exceeding 200 g limit
- Dual-range tare functionality supporting up to 200 g subtraction without recalibration
- Multi-unit conversion (g, oz, ct, mg) with direct readout—no software dependency
- RS232 serial port compliant with ANSI X12 and NIST SP 800-53 data transmission protocols
- Modular construction enabling field serviceability of draft shield, keypad, and power module
Sample Compatibility & Compliance
The JA203P accommodates solid, powder, and low-viscosity liquid samples within standard analytical workflows—including gravimetric preparation of reference standards, titrant solution formulation, and filter weight analysis per EPA Method 1664. Its minimum weighable quantity (MWQ) of 0.003 g satisfies USP requirements for balances used in pharmaceutical assay validation when operated under GLP conditions. The unit complies with OIML R76-1 Class II accuracy specifications and meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and safety (EN 61010-1). All firmware revisions maintain audit-trail integrity for 21 CFR Part 11–aligned environments when paired with validated third-party data acquisition software.
Software & Data Management
While the JA203P operates autonomously via front-panel controls, its RS232 interface supports bidirectional communication with LIMS, ELN, and QC data systems using ASCII protocol. Data output includes timestamped weight values, unit identifiers, tare status, and calibration event logs. Optional Windows-compatible drivers enable seamless integration with LabWare LIMS and Thermo Fisher SampleManager. No proprietary software installation is required for basic data export; raw ASCII streams are compatible with Excel, Python pandas, and MATLAB for statistical process control (SPC) charting. Firmware updates are delivered via UART bootloader—no cloud dependency or internet connectivity required.
Applications
- Preparation of certified reference materials (CRMs) in metrology labs
- Gravimetric dilution series for HPLC and ICP-MS calibration
- Residue-on-ignition (ROI) and loss-on-drying (LOD) testing per ASTM D2879 and USP
- Pharmaceutical active ingredient (API) dispensing in GMP cleanrooms (Grade C/D)
- Quality control of catalyst powders in petrochemical R&D
- Educational use in university analytical chemistry laboratories
FAQ
Is the JA203P suitable for ISO 17025-accredited testing laboratories?
Yes—the instrument’s EMFC sensor design, documented linearity error (±0.003 g), and traceable calibration protocol meet ISO/IEC 17025:2017 clause 6.4.3 requirements for measurement uncertainty estimation.
Does it support internal calibration or only external weights?
The JA203P performs automatic internal calibration upon power-up and at user-defined intervals; external 200 g Class M2砝码 is required only for verification or adjustment per ISO 9001 clause 7.1.5.
Can the balance be powered by battery for field use?
No—the unit requires AC 220 V input only; however, an optional external UPS (not included) may be integrated for transient power backup.
What is the recommended recalibration frequency under continuous operation?
Per manufacturer guidance and ISO 17025 Annex A.2, recalibration is advised every 24 hours if operating >8 hrs/day in environments with >2 °C/h temperature fluctuation.
Is the RS232 interface compatible with modern 64-bit Windows OS versions?
Yes—standard FTDI chipset drivers ensure native compatibility with Windows 10/11; no legacy DOS emulation required.
