Precisa XS4250C Precision Analytical Balance

Overview

The Precisa XS4250C Precision Analytical Balance is an entry-level yet rigorously engineered mass measurement instrument designed for routine laboratory weighing tasks requiring high repeatability and operational robustness. Built upon a monolithic load cell architecture with electromagnetic force compensation technology, the XS4250C delivers stable, drift-compensated readings under variable environmental conditions typical of QC labs, pharmaceutical production support areas, and academic teaching laboratories. Its 4250 g capacity and 10 mg readability position it between precision top-loading balances and higher-resolution analytical instruments—making it ideal for applications where sample size exceeds standard analytical pan limits but resolution finer than 0.01 g remains essential. The balance conforms to international metrological principles outlined in OIML R76-1 and adheres to ISO/IEC 17025 traceability requirements when used with certified reference weights and documented calibration procedures.

Key Features

• Fluorescent display option ensures legible readouts under low-light, high-glare, or oblique viewing conditions—critical in multi-user lab environments with varying ambient illumination.
• User-defined internal calibration allows direct implementation of custom weight values without physical recalibration, reducing reliance on external certified masses and supporting traceable in-house verification protocols.
• Three-stage stability adjustment enables optimization of response speed versus noise rejection—configurable for fast settling during gross weighing or enhanced filtering for micro-vibrational environments (e.g., near centrifuges or HVAC ducts).
• Auto-power-on functionality resumes operation after power interruption, preserving user-defined settings and minimizing workflow disruption in shared facilities.
• Programmable auto-off timer conserves energy and extends component lifetime while maintaining compliance with institutional energy management policies.
• Chrome-nickel steel weighing pan (170 × 170 mm) provides corrosion resistance and mechanical durability against repeated thermal cycling and chemical exposure during routine cleaning or solvent handling.

Sample Compatibility & Compliance

The XS4250C accommodates heterogeneous sample forms—including powders, granules, liquids in containers, and solid specimens up to 4.25 kg—without compromising linearity or reproducibility. Its tare range matches full capacity, enabling accurate net-weight determination of large vessels or nested containers. The balance operates within the temperature range specified by ISO 9001 and ASTM E898 for non-climate-controlled lab spaces. While not inherently compliant with FDA 21 CFR Part 11 out-of-the-box, its internal memory logs calibration events and user-initiated zero/tare actions—providing foundational audit trail elements compatible with GLP/GMP documentation workflows when integrated into validated SOPs.

Software & Data Management

The XS4250C supports RS232 serial output for direct connection to PCs, LIMS, or statistical process control (SPC) software. ASCII-formatted data packets include timestamp, weight value, unit, stability flag, and operation code—enabling automated data capture without proprietary drivers. Optional PC interface software (sold separately) facilitates batch export, statistical summary generation (mean, SD, CV%), and export to CSV or Excel-compatible formats. All firmware updates are delivered via secure USB key, ensuring version control integrity across multi-unit deployments.

Applications

• Raw material receipt inspection in food, chemical, and pharmaceutical manufacturing facilities.
• Formulation batching where intermediate ingredient weights must be verified prior to high-shear mixing or granulation.
• Environmental lab sample preparation—weighing soil composites, filter media, or digested wastewater residues.
• University teaching labs conducting stoichiometric experiments, gravimetric analysis, or density determinations.
• Quality control checkpoints in packaging lines verifying fill weight consistency before secondary labeling.

FAQ

Is the XS4250C suitable for use in regulated GMP environments?
Yes—when operated within defined environmental parameters, calibrated using traceable standards, and integrated into documented procedures with appropriate change control and audit trail practices.
Does the balance support external calibration with non-Precisa weights?
Yes—the internal calibration function accepts user-entered nominal values, allowing alignment with accredited reference masses from third-party calibration providers.
Can the fluorescent display be retrofitted to units originally equipped with LCD?
No—display type is hardware-configured at manufacture; fluorescent and LCD variants are distinct SKUs.
What is the recommended recalibration interval under continuous daily use?
Precisa recommends performance verification every 24 hours and full calibration every 7 days—or immediately following relocation, temperature shifts >5°C, or mechanical shock.
Is the RS232 interface opto-isolated?
Yes—the interface includes galvanic isolation to prevent ground-loop interference in electrically noisy industrial lab settings.