JC Series 200JC Precision Electronic Balance
| Origin | Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | 200JC |
| Price Range | USD 420–560 (FOB) |
| Instrument Type | Precision Balance |
| Capacity | 210 g |
| Readability | 0.01 g |
| Pan Diameter | Φ118 mm |
| Power Supply | AC 220 V / DC 9 V |
| Features | Removable draft shield, tare, piece counting, wide-angle LCD display, dual-power operation |
Overview
The JC Series 200JC Precision Electronic Balance is an entry-level analytical-grade instrument engineered for consistent mass measurement in industrial quality control, laboratory preparation, and production floor environments. Based on electromagnetic force compensation (EMFC) transduction technology, it delivers stable, drift-compensated readings under variable ambient conditions—without requiring internal mechanical calibration weights. Its 210 g maximum capacity and 0.01 g readability meet the performance requirements of ISO/IEC 17025-compliant routine weighing tasks, including formulation checks, raw material verification, and batch sampling where sub-centigram resolution is sufficient. The balance operates within a standard temperature range of 10–30 °C and relative humidity up to 80 % RH (non-condensing), with built-in auto-zero tracking and digital filtering to suppress vibration-induced noise.
Key Features
- Removable draft shield assembly: Enables rapid setup and cleaning while maintaining measurement integrity during low-airflow operations—ideal for non-GLP environments where full enclosure is unnecessary.
- Dual power architecture: Supports both AC 220 V mains input and DC 9 V external battery pack, enabling flexible deployment in field laboratories, warehouse staging areas, or mobile QC stations.
- Wide-angle backlit LCD: 128 × 64 pixel monochrome display with adjustable contrast ensures legibility from multiple viewing angles, reducing operator fatigue during extended use.
- Functional versatility: Integrated tare, preset piece counting (with automatic unit weight calculation), and zero-tracking mode support multi-step workflows without external software.
- Robust mechanical design: Stainless steel weighing pan (Φ118 mm) mounted on a rigid aluminum alloy base; shock-absorbing feet minimize transmission of floor-borne vibrations.
- Calibration-ready interface: Includes internal calibration port compatible with standard Class M2 or Class F1 test weights (not supplied), supporting traceable verification per ASTM E898 and ISO 9001 documentation protocols.
Sample Compatibility & Compliance
The 200JC accommodates solid, granular, and powdered samples within its 210 g capacity limit. Its open-top configuration (with optional shield) permits direct placement of beakers, vials, and small containers up to 120 mm in height. While not certified for USP or FDA 21 CFR Part 11 compliance due to absence of audit trail or user access controls, the device meets general-purpose metrological requirements outlined in OIML R 76-1 (2017) for Class II precision balances. It is suitable for non-regulated applications such as in-process blending verification, packaging line checks, educational demonstrations, and inventory management—provided users perform periodic external verification using accredited reference masses.
Software & Data Management
The 200JC does not feature onboard data logging or USB/RS-232 connectivity. All measurements are displayed in real time only and are not stored internally. For traceable recordkeeping, integration with external systems requires manual transcription or third-party serial-to-USB adapters configured for ASCII output (e.g., “S” command protocol). Laboratories implementing GLP or GMP workflows must supplement this instrument with documented procedural controls—including daily verification logs, environmental monitoring records, and defined re-calibration intervals aligned with internal SOPs.
Applications
- Production line ingredient dosing verification for food, pharmaceutical excipients, and chemical additives
- Quality assurance checks during secondary packaging (e.g., count-based filling validation)
- Academic teaching labs conducting stoichiometric experiments and solution preparation
- Maintenance workshops verifying component mass before and after surface treatment
- Small-scale contract manufacturing sites requiring portable, low-cost weighing infrastructure
FAQ
What is the recommended calibration frequency for the 200JC?
Calibration should be performed at startup, after relocation, following significant temperature shifts (>5 °C), and prior to critical measurements—per ISO/IEC 17025 Clause 6.5. Users must document all calibrations using traceable standards.
Can the 200JC be used in a fume hood?
Yes, provided the draft shield is installed and airflow velocity remains below 0.2 m/s at the pan level; excessive ventilation will degrade repeatability.
Is the display readable under fluorescent lighting?
Yes—the LCD uses high-contrast segment drivers optimized for industrial lighting conditions, including 50/60 Hz flicker-prone environments.
Does the balance support metric/imperial unit switching?
No—output is fixed in grams only, consistent with international SI conventions for scientific and regulatory reporting.
What is the warm-up time required before first use?
Minimum 30 minutes after power-on to achieve thermal equilibrium of the EMFC sensor and stabilize zero point drift.
