A&D HW Series Precision Electronic Platform Scale

Overview

The A&D HW Series Precision Electronic Platform Scale is an industrial-grade weighing instrument engineered for high-reliability static and dynamic weighing tasks in manufacturing, logistics, quality control, and laboratory support environments. Built upon A&D’s decades of Japanese precision engineering heritage, the HW Series employs electromagnetic force compensation (EMFC) load cell technology — delivering stable, drift-resistant measurement performance across variable ambient conditions. Unlike basic strain-gauge platforms, EMFC architecture ensures superior long-term repeatability, minimal temperature-induced error, and consistent linearity across the full span. The scale is purpose-built for integration into production lines requiring pass/fail verification, batch filling, component counting, and weight-based packaging validation. Its robust mechanical design supports continuous operation in demanding factory settings while maintaining metrological integrity under routine cleaning, vibration, and intermittent moisture exposure.

Key Features

• IP65-rated weighing platform — fully protected against dust ingress and low-pressure water jets, enabling safe use in wet or washdown-prone areas including food processing, pharmaceutical packaging, and chemical handling zones.
• Dual-power operation — operates seamlessly via included AC adapter or rechargeable battery pack, supporting portable deployment across warehouse zones without fixed power infrastructure.
• 7-digit, 25 mm high-contrast LCD or fluorescent display — optimized for readability at distances up to 3 meters; backlighting (fluorescent variant) enhances visibility in low-light operational environments.
• Integrated comparator functionality — programmable upper/lower limits enable real-time go/no-go judgment during inspection, assembly, or packing processes without external software.
• Digital tare, hold, counting, and percentage weighing modes — support multi-step workflows including net weight deduction, piece-count calibration, and formulation ratio monitoring.
• Auto-accumulation mode — logs sequential weight entries for batch totals, facilitating manual or semi-automated packaging statistics without spreadsheet intervention.
• Stainless steel pan construction — corrosion-resistant surface withstands repeated cleaning with alcohol, sodium hypochlorite, or mild acidic solutions per facility hygiene protocols.

Sample Compatibility & Compliance

The HW Series accommodates a broad range of sample types — from bulk granular materials (e.g., powders, pellets, tablets) to packaged goods, raw components, and intermediate assemblies. Its large pan dimensions (up to 390 × 530 mm) and elevated load capacity (up to 220 kg) support oversized or irregularly shaped items common in automotive, electronics, and medical device manufacturing. The scale meets mechanical safety requirements per IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emission), and its measurement stability aligns with OIML R76-1 Class III specifications for non-automatic weighing instruments. While not certified for legal-for-trade use in all jurisdictions, its documented linearity, repeatability, and eccentric load performance support internal process validation under ISO 9001, ISO 13485, and FDA 21 CFR Part 11–aligned data governance frameworks when paired with audit-trail-capable software.

Software & Data Management

Standard RS-232C serial interface enables direct connection to PCs, PLCs, label printers, or statistical process control (SPC) terminals. Optional OP-03 (RS-232 + comparator output) and OP-04 (RS-422/485) modules extend communication reach and noise immunity in electrically noisy plant floors. For traceable recordkeeping, the scale outputs ASCII-formatted weight strings with timestamp (when synchronized to host), unit identifier, and status flags (e.g., “STABLE”, “TARE”, “OVERLOAD”). When integrated with compliant third-party software — such as LabArchives ELN, NetSuite WMS, or custom MES interfaces — the HW Series supports electronic signature capture, user-level access control, and automated PDF report generation satisfying GLP and GMP documentation requirements.

Applications

• Quality assurance checkpoints: verifying filled container weights against nominal values and tolerance bands.
• Component counting: calibrating piece-weight averages for fast, accurate inventory reconciliation of screws, connectors, or PCB assemblies.
• Batch formulation: monitoring cumulative ingredient addition in low-speed mixing or dispensing operations.
• Shipping & logistics: verifying palletized load distribution prior to dispatch to prevent axle overloading or dimensional noncompliance.
• Pharmaceutical secondary packaging: confirming blister pack or vial carton counts via weight correlation before case sealing.
• Maintenance & calibration logging: recording pre- and post-calibration weights using external certified test masses traceable to NIST or JCSS standards.

FAQ

Is the HW Series approved for trade use in the United States or EU?
No — the HW Series is designated for industrial process control and internal quality assurance, not legal-for-trade transactions. It does not carry NTEP or MID certification.
Can the scale store calibration records internally?
No — calibration data must be recorded externally. However, the scale supports multi-point calibration routines via front-panel prompts and retains zero-tracking parameters after power cycling.
What is the maximum cable length supported for RS-232 communication?
Up to 15 meters under standard conditions; longer runs require RS-422/485 (OP-04 option) for reliable signal integrity.
Does the HW Series support automatic unit conversion (e.g., kg → lb → oz)?
Yes — selectable units include kg, lb, oz, and g, configurable via keypad menu without firmware update.
How often should routine verification be performed?
Per ISO/IEC 17025 and internal SOPs, daily zero checks and weekly verification with Class F1 or better test weights are recommended for critical applications.