Precisa XS625M-SCS Economic Internal Calibration Electronic Balance

Overview

The Precisa XS625M-SCS is an entry-level internal calibration electronic balance engineered for laboratories and quality control environments requiring reliable mass measurement at the 1 mg readability level. Designed and manufactured in Switzerland, it operates on the principle of electromagnetic force compensation (EMFC), where the downward gravitational force exerted by a sample is precisely counterbalanced by an electromagnetic force generated within the transducer. The resulting current required to maintain equilibrium is linearly proportional to mass and digitally converted into a stable weight reading. Its internal calibration system eliminates dependency on external reference weights during routine verification—reducing operator error, minimizing calibration downtime, and supporting consistent traceability under ISO/IEC 17025 and GLP-compliant workflows.

Key Features

• Internal self-calibration function activated manually or scheduled automatically—ensures long-term accuracy without external weights.
• Fluorescent display with wide viewing angle and high contrast, optimized for visibility under variable ambient lighting conditions including low-light or glare-prone environments.
• Three-step adjustable stability setting allows users to prioritize speed or precision depending on sample volatility or environmental vibration.
• Automatic power-on upon mains restoration and programmable auto-off after user-defined idle time—enhancing energy efficiency and operational safety.
• Robust chromium-nickel steel weighing pan (135 × 135 mm) resistant to corrosion and mechanical wear, compatible with standard laboratory containers and volumetric glassware.
• Compact footprint (210 × 340 × 150 mm) and integrated 60 mm draft shield support space-constrained benchtop deployment without compromising repeatability.

Sample Compatibility & Compliance

The XS625M-SCS accommodates solid, granular, and low-viscosity liquid samples up to 625 g. Its tare range matches full capacity, enabling sequential weighing of multiple components in formulation or dilution workflows. The balance meets essential metrological requirements outlined in OIML R 76-1 (2021) Class II specifications for non-automatic weighing instruments. It supports basic audit readiness through timestamped calibration logs and operator-accessible calibration history—though full 21 CFR Part 11 compliance requires optional software integration with Precisa’s LabX™ or third-party LIMS platforms. Environmental operation from 0 °C to 40 °C—with sensitivity drift controlled to ±2 ppm/°C between 10–30 °C—makes it suitable for general-purpose labs, educational institutions, and production floor QC stations.

Software & Data Management

While the XS625M-SCS operates as a standalone instrument, its RS232 interface enables bidirectional communication with PCs or printers for raw data export. ASCII-formatted output includes weight value, unit, stability status, and calibration timestamp. When connected to Precisa’s free WinCT software or industry-standard data acquisition tools (e.g., LabVIEW, MATLAB via serial drivers), users can automate report generation, perform statistical process control (SPC) analysis, and archive measurements in CSV or Excel-compatible formats. Optional GLP/GMP audit trail modules are available through firmware upgrade paths, providing user login tracking, electronic signatures, and immutable calibration event records.

Applications

• Raw material receipt inspection and batch release testing in pharmaceutical excipient and chemical manufacturing.
• Weighing standards and reference materials in calibration laboratories performing intermediate checks per ISO 17025 clause 6.5.2.
• Student experiments and teaching labs requiring robust, intuitive instrumentation with minimal maintenance overhead.
• Food and beverage QA departments conducting net content verification and ingredient proportioning.
• Environmental testing labs preparing reagent solutions and filter paper mass differentials for particulate matter analysis (e.g., EPA Method 201A).

FAQ

Does the XS625M-SCS require external calibration weights?
No—the internal calibration mechanism uses a built-in motorized weight actuator; only periodic verification with certified weights is recommended per ISO/IEC 17025 clause 5.10.
Can the balance be used in a fume hood?
Yes, provided ambient temperature remains within 0–40 °C and airflow does not exceed 0.5 m/s directly over the pan; the 60 mm draft shield provides moderate turbulence mitigation.
Is the fluorescent display replaceable or upgradable to LCD?
No—the display type is fixed at manufacture; fluorescent is standard, while LCD is offered on higher-tier XS series models (e.g., XS625M-LCD).
What is the warranty coverage and service support structure?
Precisa provides a 24-month limited warranty covering parts and labor; authorized service centers operate across EMEA, North America, and APAC regions with documented turnaround SLAs.
How is linearity verified during factory calibration?
Using NIST-traceable weights at five points (0%, 25%, 50%, 75%, and 100% of capacity) under controlled thermal and vibrational conditions per ASTM E898-22 Annex A1.