AND SJ Series Mini Desktop Scale

Overview

The AND SJ Series Mini Desktop Scale is an entry-level precision weighing instrument engineered for consistent performance in light-duty laboratory, educational, retail, and general industrial environments. Built on A&D’s legacy of Japanese manufacturing rigor, the SJ Series employs electromagnetic force restoration (EMFR) load cell technology—optimized for stability and repeatability across its full capacity range (1000 g to 30 kg). Unlike strain-gauge-based platforms, EMFR architecture delivers inherently linear response, minimal drift over time, and high immunity to environmental thermal gradients—critical for applications requiring reliable daily use without frequent recalibration. Designed explicitly for benchtop deployment, the compact footprint and low-profile chassis integrate seamlessly into constrained workspaces while maintaining structural integrity under repeated loading cycles. The scale operates within ambient conditions of 10–40 °C and 20–80% RH (non-condensing), conforming to JIS Class III accuracy requirements per JIS B 7721:2014 for non-automatic weighing instruments.

Key Features

• Stabilization time ≤1 second across all models—enabling rapid throughput in high-volume routine weighing tasks.
• Stainless steel weighing pan (standard on SJ-HS variants) resists corrosion, facilitates cleaning, and complies with hygiene-sensitive workflows.
• Large-digit LCD display (25 mm character height) ensures legibility from multiple viewing angles and under variable lighting conditions.
• Dual power configuration: four standard AA batteries (supplied) provide up to 120 hours of continuous operation; optional AC adapter enables uninterrupted use during extended sessions.
• Programmable auto power-off reduces battery consumption while preserving zero-point stability between uses.
• Full digital internal calibration eliminates mechanical adjustment dependencies—calibration is performed via front-panel key sequence and verified against stored reference values.
• Multi-unit support includes grams (g), pounds (lb), ounces (oz), and compound lb-oz format—essential for cross-functional documentation in multinational facilities.

Sample Compatibility & Compliance

The SJ Series accommodates solid, granular, and packaged samples within its specified capacity and pan dimensions (230 × 190 mm). Its resolution ratio—ranging from 1/2000 (SJ-1000H) to 1/5000 (SJ-30KHS)—meets typical tolerances for raw material intake verification, component counting, and packaging QA checks. While not certified for legal-for-trade applications under NTEP or MID directives, the series adheres to fundamental metrological principles outlined in OIML R76-1 and ISO 9001-aligned operational controls. All units undergo factory verification per A&D’s internal quality protocol, including linearity, repeatability, and eccentricity testing at three load points (20%, 50%, and 100% of capacity).

Software & Data Management

The SJ Series operates as a standalone instrument without embedded data logging or PC connectivity. However, its stable RS-232 interface (available on select SJ-HS models upon request) supports basic ASCII output to external printers or legacy lab systems using standard weight transmission protocols (e.g., “S” command format). No proprietary software is required; output is compatible with spreadsheet import, LIMS ingestion scripts, or custom automation frameworks. For environments governed by GLP or GMP, users may implement manual audit trails for calibration events and operational checks—consistent with FDA 21 CFR Part 11 Annex 11 expectations for non-automated systems.

Applications

• Education: Student laboratories performing stoichiometric calculations, density determinations, and mass conservation experiments.
• Quality control: In-process verification of component weights in electronics assembly, pharmaceutical packaging, and food portioning lines.
• Retail & logistics: Parcel weighing, inventory reconciliation, and shipping label generation where traceability to ±0.02 kg suffices.
• Maintenance workshops: Tool crib management, consumable stock tracking, and lubricant dispensing validation.
• Field service: Portable use enabled by battery operation—ideal for on-site calibration support or mobile inspection teams.

FAQ

Is the SJ Series suitable for ISO/IEC 17025-accredited laboratories?
It may be used for non-critical supporting measurements, but it lacks documented uncertainty budgets, accredited calibration certificates, or built-in audit trail functionality required for accredited scope items.
Can the scale be calibrated with external weights?
No—calibration is fully digital and internal; no external weights or physical adjustments are supported or required.
What is the warranty coverage?
A&D provides a standard 2-year limited warranty covering defects in materials and workmanship under normal use, excluding wear items such as batteries and cables.
Does the SJ Series meet any specific industry standards?
It conforms to JIS B 7721:2014 (Class III) and EMC Directive 2014/30/EU for electromagnetic compatibility, with CE marking applied accordingly.
Is the RS-232 port standard or optional?
RS-232 is not included on base SJ-H/HS models; it is available only on specially ordered SJ-HS variants with firmware version 2.1 or later.