OHAUS R2000 Portable Counting Scale

Overview

The OHAUS R2000 Portable Counting Scale is an industrial-grade, battery-powered counting scale engineered for high-reproducibility piece-counting operations in manufacturing, warehousing, quality control, and parts distribution environments. Unlike general-purpose balances, the R2000 implements advanced sample-based counting logic grounded in statistical weight averaging—measuring the average unit weight of a known reference sample (e.g., 10–50 pieces), then extrapolating total count from gross weight with real-time compensation for minor weight drift and environmental fluctuations. Its compact form factor, integrated rechargeable lithium-ion power system, and rugged ABS housing enable reliable deployment across dynamic factory floors, mobile inspection stations, and multi-site inventory audits—without dependency on AC mains or fixed benchtop infrastructure.

Key Features

• Seven dedicated application modes: Piece Counting, Checkweighing, Percent Weighing, Totalization, Accumulation, Dynamic Weighing, and Net/Gross/Tare operations—each accessible via intuitive front-panel soft keys.
• High-stability electromagnetic force restoration (EMFR) load cell architecture optimized for rapid stabilization (<1.5 s) and minimal zero drift under ambient temperature shifts (10–40 °C).
• Integrated rechargeable Li-ion battery providing up to 100 hours of continuous operation per full charge; USB-C port supports simultaneous charging and data export.
• Large, backlit LCD display (128 × 64 pixels) with adjustable contrast and dual-unit readout (g / oz / lb:oz), supporting simultaneous display of count, weight, and deviation tolerance.
• IP54-rated enclosure with reinforced stainless-steel weighing pan (150 × 180 mm) and anti-static surface treatment—designed for resistance to dust ingress and incidental liquid splashes in non-hazardous industrial settings.
• Configurable counting tolerance thresholds (±0.1% to ±5.0%) with audible/visual over-limit alerts—enabling compliance with internal QC protocols and ISO 9001:2015 clause 7.1.5.2 (monitoring and measuring resources).

Sample Compatibility & Compliance

The R2000 accommodates uniform or near-uniform discrete components—including screws, washers, electronic connectors, pharmaceutical tablets (blister-packed or bulk), machined metal parts, and plastic fasteners—provided unit weight variation remains within ±3% of the mean (per ASTM E105-21 sampling guidelines). It does not support irregular, hygroscopic, or magnetically active samples without prior validation. The device complies with ANSI/NCSL Z540-1 and OIML R76-1 (Class III) metrological requirements for non-automatic weighing instruments. Firmware supports GLP-compliant audit trail logging (user ID, timestamp, mode change, calibration event) when connected to OHAUS LoggerPro™ software—meeting foundational traceability expectations under FDA 21 CFR Part 11 for regulated light-industrial applications.

Software & Data Management

The R2000 features bidirectional RS-232 and USB virtual COM port connectivity for seamless integration with MES, ERP, or custom inventory databases. Optional OHAUS LoggerPro™ v3.2 software enables automated data capture, batch-level report generation (CSV/PDF), and configurable export templates aligned with ISO/IEC 17025 documentation standards. All weighing and counting events—including reference sample size, average unit weight, tolerance band, and final count—are timestamped and stored locally (up to 1,000 records) with overwrite protection enabled by default. No cloud dependency or proprietary subscription is required for core functionality.

Applications

• Automated component kitting in electronics assembly lines—validating BOM accuracy prior to SMT placement.
• In-process verification of screw counts during automotive subassembly, reducing line-stoppage due to missing fasteners.
• Pharmaceutical secondary packaging QA—confirming tablet counts per bottle or blister card against master batch records.
• Warehousing cycle counts where handheld scanners lack precision for small-part reconciliation (e.g., MRO inventory of O-rings, springs, or PCB spacers).
• Educational labs teaching metrology fundamentals, statistical process control (SPC), and measurement uncertainty estimation using real-world discrete-part datasets.

FAQ

What is the minimum recommended sample size for accurate counting?
A minimum of 10 pieces is required; however, 20–50 pieces are strongly recommended to minimize standard deviation impact on average unit weight calculation—per ISO 11843-1 guidance on detection capability estimation.
Can the R2000 be calibrated internally without external weights?
No—internal calibration is not supported. Calibration requires certified Class M2 or better external test weights traceable to NIST or equivalent national metrology institute (NMI), performed at least daily or per shift change in high-precision environments.
Is the R2000 suitable for use in cleanroom environments?
It meets ISO 14644-1 Class 8 (100,000) particulate limits when operated with appropriate static-dissipative gloves and cleaned per OHAUS Cleaning Protocol CP-002—but lacks HEPA-filtered enclosures or laminar airflow compatibility required for Class 5 or stricter environments.
Does the device support RS-232 communication with legacy PLC systems?
Yes—standard ASCII protocol with user-configurable baud rate (2400–115200 bps), parity, and termination characters; driver-free integration confirmed with Siemens S7-1200, Allen-Bradley Micro850, and Mitsubishi FX5U series PLCs.
How is firmware updated?
Via USB connection using OHAUS Firmware Updater v2.1 (Windows/macOS); no internet connection required—critical for air-gapped production networks subject to IT security policies.