OHAUS Defender 5000 Series Heavy-Duty Platform Scale DF52P3000HVZH

Overview

The OHAUS Defender 5000 Series Heavy-Duty Platform Scale DF52P3000HVZH is an industrial-grade weighing system engineered for precision, durability, and long-term reliability in demanding production, logistics, and quality control environments. Built upon a dual-layer structural architecture with a low-profile 90 mm ground clearance, the scale integrates four high-stability OIML R60-certified load cells—alloy steel (IP67 rated) or hermetically sealed stainless steel (IP68 rated)—to ensure consistent force transduction under repeated full-scale loading. Its platform surface features 6 mm textured steel or stainless steel plate (8 mm for 5-ton variants), while the U-shaped base frame is fabricated from 4 mm pressed steel or stainless steel, validated through 500,000-cycle fatigue testing at maximum capacity. This mechanical robustness supports continuous operation in ambient conditions ranging from –10 °C to +40 °C and relative humidity up to 90 % RH (non-condensing), making it suitable for wet, dusty, or high-traffic industrial floors.

Key Features

• Dual-layer reinforced platform design with optimized load distribution and minimal deflection under dynamic loading
• Low-height 90 mm profile enabling seamless integration with conveyors, pallet jacks, and automated material handling systems
• Four OIML R60 Class C3 or C4 certified load cells—alloy steel (IP67) or fully welded stainless steel (IP68)—for metrological traceability and environmental resilience
• IP65-rated all-stainless-steel junction box with protected terminal blocks and corrosion-resistant gasketing
• Modular interface architecture supporting factory-standard RS232 and configurable optional modules including Ethernet, RS485, USB, Bluetooth, analog (4–20 mA / 0–10 VDC), and digital I/O (2-in / 4-out)
• Integrated firmware supporting real-time weight stabilization algorithms, auto-zero tracking, and drift compensation across temperature gradients

Sample Compatibility & Compliance

The DF52P3000HVZH accommodates standard industrial payloads—including palletized goods, drums, crates, and bulk containers—up to its rated capacity (model-specific; consult datasheet for exact range). Its platform geometry and low center of gravity minimize tipping risk during off-center loading. The scale complies with international legal metrology requirements per OIML R60 for load cell performance and accuracy class designation. Enclosure ratings meet IP65 (housing), IP67 (standard load cells), and IP68 (stainless variant), ensuring operational integrity in washdown, outdoor, or high-humidity settings. While not inherently GLP/GMP or FDA 21 CFR Part 11 compliant out-of-the-box, its audit-ready data logging (when paired with compatible software) and configurable user access levels support integration into regulated manufacturing workflows requiring documented calibration, maintenance, and usage records.

Software & Data Management

The scale operates via embedded firmware with menu-driven configuration accessible via front-panel keypad and backlit LCD. Raw weight data and mode-specific metadata (e.g., count batch ID, checkweigh result pass/fail flag) are transmitted via RS232 or optional interfaces to host systems. When connected to OHAUS ACIS™ or third-party SCADA/MES platforms, the DF52P3000HVZH supports time-stamped data export in CSV or ASCII format, including gross/net/tare values, unit identifiers, and operator codes. Optional analog and digital I/O enable direct PLC interfacing for automated gate control, reject actuation, or fill-level feedback loops. Firmware updates are performed via USB or serial connection using OHAUS-provided utilities, with version history and checksum validation ensuring integrity.

Applications

This platform scale serves critical functions across multiple industrial verticals: incoming raw material verification in food processing plants; in-line checkweighing of packaged goods prior to case packing; inventory reconciliation in warehouse receiving docks; batch counting of components in automotive assembly; and dynamic weighing of moving loads on roller conveyors. Its rugged construction and ingress protection make it ideal for foundry floor use, agricultural feed blending stations, municipal waste sorting facilities, and pharmaceutical excipient dispensing areas where hygiene and mechanical endurance are equally essential. The dual RS232/RS485 option facilitates daisy-chained multi-scale networks in large distribution centers.

FAQ

What is the maximum permissible error (MPE) for this model under OIML R60?
OIML R60 defines MPE based on verification scale interval (e) and accuracy class. For Class C3 or C4 load cells installed in this scale, MPE is ±0.5e for ≤500e, ±1.0e for >500e to 2000e, and ±1.5e for >2000e. Exact values depend on configured division size and capacity.
Can the scale be calibrated with external weights traceable to NIST or equivalent NMIs?
Yes. The scale supports two-point linear calibration using certified test weights. Calibration certificates must reference national metrology institute (NMI) traceability, and procedures comply with ISO/IEC 17025–recommended practices for in-house calibration.
Is firmware upgrade capability available for future protocol support (e.g., MQTT, OPC UA)?
Current firmware does not natively support MQTT or OPC UA. However, OHAUS provides API documentation for RS232/RS485 ASCII protocols, enabling custom middleware development for cloud or IIoT integration.
Does the stainless steel variant meet FDA or EHEDG guidelines for food contact surfaces?
The stainless steel platform and junction box conform to AISI 304/316 material specifications and surface finish standards typical for food-grade equipment. However, formal FDA or EHEDG certification requires system-level validation by end users per their specific process environment.
What is the recommended recalibration interval under continuous 24/7 operation?
OHAUS recommends quarterly functional verification and annual full recalibration under continuous duty. Interval adjustments may be justified by internal risk assessment per ISO 9001 clause 7.1.5 or IATF 16949 section 7.1.5.2, supported by historical stability data.