B-Series Precision Electronic Balance Model 2000B
| Origin | Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | 2000B |
| Price Range | USD 420–560 |
| Instrument Type | Precision Balance |
| Capacity | 200–500 g |
| Readability | 0.001 g (1 mg) |
| Pan Dimensions | Ø130 mm |
| Power Supply | AC 220 V, 50 Hz |
| Compliance | ISO 9001, ASTM E898, OIML R76 Class II |
Overview
The B-Series Precision Electronic Balance Model 2000B is an entry-level laboratory-grade analytical balance engineered for reproducible mass measurement in environments where high sensitivity and operational reliability are required—but full microgram-level resolution is not essential. Utilizing electromagnetic force compensation (EMFC) technology, the 2000B delivers stable, drift-compensated readings under standard ambient conditions (20 ± 5 °C, RH < 80%, non-condensing). Its 1 mg readability and 200–500 g capacity make it suitable for routine weighing tasks in quality control laboratories, educational chemistry labs, pharmaceutical formulation support, and industrial R&D settings. The balance conforms to fundamental metrological principles defined in OIML R76-1 (2017) for Class II instruments—ensuring traceable performance across its specified operating range without requiring frequent recalibration under stable environmental conditions.
Key Features
- Stainless steel weighing pan (Ø130 mm) with corrosion-resistant surface finish for long-term durability and ease of cleaning.
- Robust metal-sprayed base housing providing mechanical stability and vibration damping on standard lab benches.
- Integrated tare function with automatic zero-tracking and manual tare reset for sequential sample weighing.
- Counting mode with automatic unit weight determination and batch quantity calculation—ideal for small-part inventory or tablet QC.
- Two display options available: high-contrast LED or energy-efficient LCD, both with 18-mm digit height and anti-glare coating.
- RS-232 interface standard; optional USB-to-serial adapter supports direct data export to LIMS or Excel-based reporting workflows.
- Auto-power-off and auto-zero tracking algorithms minimize operator intervention and reduce warm-up time to < 60 seconds.
Sample Compatibility & Compliance
The Model 2000B accommodates solid, granular, and low-viscosity liquid samples within its physical pan constraints. It is not designed for volatile solvents, magnetic materials, or samples generating static charge without prior grounding protocols. All units undergo factory calibration using certified Class F1 weights traceable to NIM (National Institute of Metrology, China) and include a calibration certificate compliant with ISO/IEC 17025 requirements. The instrument meets structural and performance criteria outlined in ASTM E898–22 (“Standard Practice for Use of Laboratory Balances”) and supports GLP documentation practices through timestamped printouts and serial-number-logged calibration events. While not 21 CFR Part 11–compliant out-of-the-box, audit-ready operation is achievable via external logging software paired with user-access-controlled login procedures.
Software & Data Management
No proprietary software is bundled; however, the RS-232 output transmits ASCII-formatted data packets at 9600 baud (8N1), compatible with industry-standard terminal emulators (e.g., Tera Term, PuTTY) and third-party data acquisition platforms such as LabArchives ELN or custom Python scripts using PySerial. Each transmission includes real-time mass value, unit identifier (g), stability flag (* for stable reading), and optional tare status. Internal memory retains last 99 readings with timestamps when connected to optional PC interface hardware. Firmware supports firmware version identification via command query, enabling version-controlled maintenance logs for ISO 9001 internal audits.
Applications
- Raw material verification and batch release testing in chemical manufacturing facilities.
- Weighing reagents, standards, and reference materials in undergraduate and graduate teaching laboratories.
- Formulation support for excipient blending in preclinical pharmaceutical development.
- Component counting for electronics assembly QA and mechanical part inspection.
- Calibration verification of pipettes and volumetric glassware using gravimetric methods per USP .
- Environmental sample preparation in soil/water analysis labs requiring sub-gram precision.
FAQ
What is the recommended calibration frequency for the Model 2000B?
For routine use under stable environmental conditions, external calibration with certified weights is advised every 24 hours or before first use each day. Internal calibration is not supported; only external two-point (zero and full-scale) verification is implemented.
Can this balance be used in a fume hood?
Yes—provided airflow velocity remains below 0.2 m/s at the pan level and the unit is mounted on a vibration-isolated platform. Draft shields are not included but may be retrofitted using third-party acrylic enclosures rated for Class II balances.
Is the RS-232 interface optically isolated?
No. Electrical isolation requires an external RS-232 isolator module to prevent ground-loop interference in multi-instrument lab networks.
Does the balance meet any international legal-for-trade requirements?
No. It is designated for laboratory and industrial process use only—not for commercial transactions subject to national metrology authority approval (e.g., NTEP, MID).
