Longteng ES5000K×20 Heavy-Duty Industrial Floor Scale with Electromagnetic Force Compensation

Overview

The Longteng ES5000K×20 is a high-capacity industrial floor scale engineered for metrological-grade mass measurement in demanding environments where stability, long-term drift resistance, and traceable accuracy are critical. Unlike conventional strain-gauge-based platforms, this model employs electromagnetic force compensation (EMFC) transduction — a principle widely adopted in high-accuracy mass comparators and national metrology institutes — to deliver superior linearity, temperature independence, and minimal hysteresis over its full 5000 kg range. Designed specifically for primary and secondary calibration laboratories, aerospace manufacturing facilities, and defense contractors, the ES5000K×20 supports verification of large reference weights (up to Class E1/E2), load cell calibration, and static mass characterization of structural components. Its robust mechanical architecture includes reinforced steel frame construction, integrated anti-vibration feet, and environmental shielding against airflow and thermal gradients — all essential for achieving repeatable results under ISO/IEC 17025-compliant conditions.

Key Features

• Electromagnetic force compensation (EMFC) sensor system ensuring high linearity (±40 g) and low zero drift across extended operational cycles
• Automatic internal calibration routine activated via front-panel interface or remote command, compliant with ISO 9001 and GLP documentation requirements
• Stainless-steel weighing pan (1200 × 1000 mm) with integrated leveling indicators and adjustable support feet for optimal load distribution
• Dual-range digital display with selectable resolution (20 g default; optional firmware upgrade for 10 g readability on sub-3000 kg loads)
• RS-232 and optional Ethernet (TCP/IP) interfaces supporting ASTM E1783, ISO 6508-1, and USP data export protocols
• IP65-rated enclosure for dust and splash resistance, suitable for controlled industrial cleanrooms and hangar environments
• Modular design enabling field serviceability and NIST-traceable recalibration without disassembly

Sample Compatibility & Compliance

The ES5000K×20 accommodates irregularly shaped, high-inertia objects including calibration masses, rocket motor casings, satellite test benches, and composite airframe sections. Its low center-of-gravity platform minimizes tipping risk during off-center loading, while the wide pan geometry ensures uniform stress distribution across the EMFC sensing element. The instrument meets national verification regulations per JJG 539–2016 (People’s Republic of China) and conforms to international metrological practices outlined in OIML R76-1:2021 for non-automatic weighing instruments (Class III). It has been deployed in accredited laboratories supporting CNSA (China National Space Administration) missions, including mass verification of Shenzhou spacecraft modules and Long March launch vehicle subsystems. Full audit trail logging, user access control, and electronic signature capability align with FDA 21 CFR Part 11 requirements when configured with validated software.

Software & Data Management

The scale integrates with Longteng MetroSuite™ v4.2 — a Windows-based calibration management platform supporting multi-instrument synchronization, uncertainty budgeting per GUM (JCGM 100:2008), and automated report generation in PDF/A-1b format. Raw measurement data is timestamped, tagged with operator ID and environmental metadata (temperature, humidity), and stored in encrypted SQLite databases with SHA-256 hashing. Export options include CSV, XML (ASTM E1382-compliant), and direct integration into LIMS systems via HL7 or OPC UA gateways. Firmware updates are delivered via signed OTA packages with cryptographic verification to ensure integrity and regulatory compliance.

Applications

• Primary calibration of 1 kg – 5000 kg reference weights (OIML Class E1 to M2)
• Static mass verification of aerospace hardware prior to environmental testing
• Quality assurance in heavy machinery assembly lines (e.g., turbine housings, hydraulic presses)
• Material density determination via buoyancy correction using calibrated water tanks
• Legal-for-trade verification in state metrology institutes under national accreditation scopes
• Research applications requiring long-duration mass monitoring (e.g., composite curing shrinkage, fuel tank evaporation studies)

FAQ

What is the recommended warm-up time before first use?
A minimum 60-minute stabilization period is required after power-on to achieve thermal equilibrium in the EMFC coil assembly and associated analog signal chain.
Can the ES5000K×20 be used in outdoor environments?
No — it is rated IP65 and intended for indoor, climate-controlled spaces with ambient temperature maintained between 15 °C and 30 °C and relative humidity below 80 % RH non-condensing.
Is external calibration certification included with purchase?
Each unit ships with a factory-issued calibration certificate traceable to NIM (National Institute of Metrology, China); third-party ISO/IEC 17025 calibration services are available upon request.
Does the scale support dynamic weighing or motion compensation?
No — the ES5000K×20 is designed exclusively for static mass measurement; it does not incorporate vibration damping algorithms or real-time motion filtering.
How often should internal calibration be performed?
Longteng recommends automatic internal calibration at startup, after every 8 hours of continuous operation, and following any significant ambient temperature shift (>3 °C).