DELEITE VLS-2204A Analytical Balance (0.1 mg Readability)

Overview

The DELEITE VLS-2204A Analytical Balance is a Class I precision instrument engineered for high-reproducibility mass measurement in regulated laboratory environments. Operating on electromagnetic force compensation (EMFC) principle, it delivers stable, drift-compensated readings across its full 220 g capacity range with a base readability of 0.1 mg—fully configurable to coarser increments (1 mg, 0.01 g, etc.) to match application-specific uncertainty requirements. Designed to meet OIML R76 and ISO/IEC 17025 metrological traceability frameworks, the VLS-2204A integrates real-time environmental monitoring (via internal temperature and drift compensation algorithms), automatic leveling verification, and dual-speed stabilization logic—ensuring consistent performance under variable ambient conditions typical of QC labs, pharmaceutical formulation suites, and academic research facilities.

Key Features

• 6.8-inch full-color capacitive touchscreen interface with intuitive icon-driven navigation and multilingual OS support (English, German, French, Spanish, Chinese)
• Embedded high-performance microcontroller architecture with adaptive filtering and dynamic zero-tracking—minimizing drift-induced error during extended weighing sessions
• Integrated electronic level indicator with on-screen guidance: automatically detects tilt angle and prompts user-leveling via visual feedback; eliminates manual bubble-level dependency
• Configurable stabilization time (2 s fast / 4 s slow) and adjustable readability—enabling optimization between throughput and resolution per SOP requirements
• Multi-mode weighing engine supporting 13 units (g, mg, oz, ozt, ct, lb, dwt, etc.) and 7 functional modes: standard weighing, piece counting, percentage weighing, checkweighing, density determination (with optional density kit), animal weighing (dynamic averaging), and load alert
• Full-range tare with auto-zero tracking and programmable auto-tare threshold—critical for serial sample preparation workflows

Sample Compatibility & Compliance

The VLS-2204A accommodates standard Ø85 mm stainless-steel weighing pans and is compatible with universal draft shields (sold separately) meeting ISO 9001 and USP <41> environmental control guidelines. Its Class I accuracy rating complies with OIML R76-1:2021 and EN 901:2022 for non-automatic weighing instruments. All calibration and adjustment procedures are internally executable and logged with timestamped audit trails—supporting GLP/GMP documentation requirements. The balance meets electromagnetic compatibility (EMC) standards per IEC 61326-1 and safety compliance per IEC 61010-1, making it suitable for installation in ISO Class 5–8 cleanrooms when used with appropriate enclosures.

Software & Data Management

Data integrity is enforced through dual-path connectivity: wired (RS-232, USB host/device) and wireless (Bluetooth 5.0 LE). The balance natively supports direct printing to ESC/POS-compatible thermal printers and bidirectional data exchange with LIMS, ELN, and ERP systems via ASCII/CSV protocols. On-device storage maintains up to 10,000 timestamped records—including real-time weight curves and metadata (operator ID, sample ID, environment log). Through DELEITE’s secure IoT cloud platform, administrators can remotely monitor instrument status (leveling state, calibration due date, error logs), push firmware updates, configure SOP-specific parameter sets, and generate PDF reports compliant with FDA 21 CFR Part 11 (electronic signatures, audit trail, role-based access control).

Applications

• Pharmaceutical quality control: active pharmaceutical ingredient (API) assay, excipient blending verification, reference standard preparation per USP <1251>
• Materials science: catalyst loading quantification, thin-film deposition mass yield analysis, nanoparticle suspension concentration validation
• Food & beverage testing: nutritional label compliance (fat/protein/carbohydrate mass fraction), moisture loss-on-drying (LOD) gravimetry
• Environmental lab workflows: filter weighing for PM2.5/PM10 particulate matter analysis, soil organic carbon determination
• Academic research: stoichiometric reagent dispensing in synthetic chemistry, microscale reaction yield calculation, electrochemical electrode loading calibration

FAQ

What calibration standards are required for internal calibration?
The VLS-2204A performs internal calibration using factory-traceable internal weights certified to ISO/IEC 17025. No external calibration masses are needed for routine operation; however, periodic external verification with NIST-traceable Class E2 or better standards is recommended per ISO/IEC 17025 clause 6.5.
Does the balance support 21 CFR Part 11 compliance?
Yes—when operated via the DELEITE IoT platform with enabled user authentication, electronic signature workflow, and immutable audit trail logging, the system satisfies all technical controls specified in FDA 21 CFR Part 11 Subpart B.
Can the weighing pan be replaced with a custom fixture?
The Ø85 mm stainless-steel pan is removable and replaceable with OEM-approved accessories (e.g., magnetic stirrer-compatible pans, micro-vial holders); third-party fixtures must not exceed 150 g tare mass or compromise EMFC sensor symmetry.
How is temperature drift compensated during long-duration measurements?
The unit incorporates dual-sensor thermal monitoring (ambient + load cell housing) and applies real-time gain correction using a proprietary polynomial model derived from factory thermal characterization across –10 °C to +40 °C.
Is RS-232 communication compatible with legacy LabWindows/CVI or LabVIEW drivers?
Yes—the device implements standard SCPI command syntax over RS-232 and includes native VISA-compliant driver packages for LabVIEW 2015+, LabWindows/CVI 2013+, and Python (pySerial) for custom integration.