B-Series Precision Electronic Balance Model 600B
| Origin | Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | 600B |
| Instrument Type | Precision Balance |
| Capacity | 200 g |
| Readability | 0.00001 g (10 µg) |
| Pan Diameter | 130 mm |
| Power Supply | AC 220 V, 50 Hz |
| Display Options | LED or LCD |
Overview
The B-Series Precision Electronic Balance Model 600B is an entry-level analytical-grade weighing instrument engineered for reproducible mass measurement in controlled laboratory environments. It operates on electromagnetic force compensation (EMFC) principle—where the weight-induced displacement of the load receptor is counterbalanced by a precisely regulated electromagnetic current, generating a digital output proportional to mass. With a maximum capacity of 200 g and readability of 10 µg (0.00001 g), the 600B meets the performance criteria for Class I precision balances per OIML R 76-1 and ISO 9001 calibration traceability requirements. Its stainless-steel weighing pan and powder-coated metal base ensure mechanical stability under minor air currents and thermal gradients typical in university teaching labs, QC rooms, and R&D facilities handling small-mass samples such as reference standards, catalysts, pharmaceutical actives, and polymer additives.
Key Features
- Electromagnetic force compensation sensor with auto-calibration routine triggered by temperature drift or time interval (configurable)
- Stainless-steel weighing pan (Ø130 mm) resistant to corrosion from solvents, acids, and alkaline residues
- Powder-coated steel base with anti-slip rubber feet for vibration damping on standard lab benches
- Dual-range display options: LED (high-brightness, low-power) or LCD (wide viewing angle, ambient light adaptive)
- Standard functions include tare, preset counting (with unit weight input), net/gross switching, and auto-zero tracking
- RS-232 interface compliant with NIST SP 800-53 and ASTM E2500-21 for external data logging and LIMS integration
- Internal diagnostics with real-time error code reporting (e.g., overload, draft shield interference, sensor saturation)
Sample Compatibility & Compliance
The 600B supports solid, granular, and powdered samples within its 200 g capacity and 10 µg resolution envelope. It is routinely deployed in applications requiring GLP-compliant documentation—such as raw material verification per USP , content uniformity testing per USP , and gravimetric preparation of standard solutions per ISO/IEC 17025:2017 Annex A.2. While not certified for hazardous area use (ATEX/IECEx), it complies with CE marking requirements under EU Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). Calibration certificates issued by accredited third-party labs (e.g., CNAS or UKAS signatories) are available upon request to support audit readiness.
Software & Data Management
The balance features a native ASCII protocol over RS-232 for seamless bidirectional communication with Windows-based data acquisition software. When connected to validated laboratory software (e.g., LabWare LIMS or Thermo Fisher SampleManager), it supports electronic signature capture, audit trail generation, and 21 CFR Part 11–compliant metadata tagging—including operator ID, timestamp, environmental conditions (if external sensors are integrated), and calibration status flags. Internal memory retains up to 200 recent weighings with timestamps; exported data conforms to ASTM E1382-20 standard formatting for traceable record retention.
Applications
- Gravimetric preparation of calibration standards in analytical chemistry labs
- Weighing of micro-dosed active pharmaceutical ingredients (APIs) during formulation development
- Mass determination of catalyst batches prior to reactor charging in chemical engineering research
- Teaching fundamental metrology concepts—including uncertainty propagation, repeatability assessment, and buoyancy correction—in undergraduate physics and materials science courses
- Quality control of fine powders (e.g., toners, pigments, nanomaterials) where mass variation ≤0.005% is critical
FAQ
What is the recommended calibration frequency for the Model 600B in a GMP environment?
Per ISO/IEC 17025:2017 Clause 6.5.2, daily verification using certified weights (e.g., Class E2 or better) is required before first use; full recalibration every 3–6 months depending on usage intensity and risk assessment.
Does the 600B support internal calibration with motorized weights?
No—the Model 600B relies on external calibration weights. Internal motorized calibration is available only on higher-tier models (e.g., B-Series Pro variants).
Can the balance be operated in a fume hood?
Yes, provided the hood sash is fully closed and airflow across the pan is minimized (<0.2 m/s); however, extended operation may affect thermal equilibrium and drift performance.
Is the RS-232 interface compatible with modern USB-C laptops?
Yes—via industry-standard USB-to-RS-232 adapters with FTDI chipsets; driver installation and port mapping must be configured per host OS requirements.
