Longteng ES Series Standard Electronic Platform Balance

Overview

The Longteng ES Series Standard Electronic Platform Balance is an industrial-grade weighing instrument engineered for high-throughput, routine mass measurement in production, quality control, and laboratory support environments. Utilizing precision strain gauge load cell technology, the ES Series delivers stable, repeatable measurements across a wide capacity range—from 10 kg to 600 kg—with readability options from 0.5 g to 200 g depending on model configuration. Designed for robust daily operation, each unit features a hardened steel or stainless-steel platform, integrated overload protection, and temperature-compensated signal conditioning to minimize drift under variable ambient conditions. The balance operates on dual power modes—AC mains or internal rechargeable battery—enabling flexible deployment on factory floors, mobile inspection stations, or field applications where fixed infrastructure is limited. Its architecture adheres to fundamental metrological principles defined in OIML R76 and ISO/IEC 17025 supporting laboratories performing traceable calibration and verification.

Key Features

• Strain gauge-based load cells with thermal drift compensation for consistent performance across 10–40 °C operating range
• Backlit LCD display with intuitive menu navigation supporting tare, accumulation, piece counting, and net/gross switching
• Manual internal calibration via standard weights (calibration certificate optional per model)
• RS-232 serial interface compliant with standard ASCII protocol for direct integration into LIMS, MES, or custom data acquisition software
• IP54-rated enclosure (for tabletop models) and reinforced structural frame (for heavy-duty floor models) ensuring resistance to dust and incidental splashes
• Built-in rechargeable battery providing ≥8 hours of continuous operation on single charge; automatic low-power mode activation during idle periods
• Modular design facilitating field service: load cell, display module, and power board are independently replaceable without full unit return

Sample Compatibility & Compliance

The ES Series accommodates diverse sample forms—including bulk solids (granules, powders, pellets), packaged goods (bags, cartons, drums), and irregularly shaped industrial components—via configurable pan sizes (236 × 286 mm to 500 × 600 mm) and optional mounting kits for conveyor integration. All models comply with GB/T 26497–2011 for electronic platform balances and bear CE marking for conformity with EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU. While not certified for legal-for-trade use under NTEP or EC Type Approval, the series meets functional requirements for non-regulated industrial weighing per ASTM E1153 (Standard Practice for Verification of Weighing Devices) and supports GLP/GMP documentation workflows through audit-ready calibration logs and user-accessible firmware version tracking.

Software & Data Management

Data output follows standardized RS-232 framing (9600 baud, 8N1) with configurable transmission triggers (on-stable, on-keypress, or periodic). Optional Windows-compatible utility software enables real-time charting, batch export to CSV/Excel, statistical analysis (mean, SD, CV%), and customizable report templates aligned with internal QA protocols. Firmware supports user-defined ID tagging per weighing session—critical for traceability in multi-shift operations. No cloud dependency or proprietary runtime required; raw ASCII streams integrate natively with LabVIEW, Python (pySerial), or SQL-based databases via middleware scripting. Audit trails—including calibration events, zero adjustments, and parameter changes—are timestamped and stored in non-volatile memory for ≥12 months.

Applications

• Production line checkweighing and fill-level verification in food processing (e.g., cereal, flour, tea, feed pellets)
• Raw material receipt inspection in pharmaceutical excipient handling and chemical manufacturing
• In-process batch weighing for formulation consistency in paint, adhesive, and polymer compounding
• Agricultural commodity grading and bagging operations (rice, soybeans, cottonseed)
• Inventory management and logistics consolidation in warehousing and distribution centers
• Teaching labs requiring durable, entry-level platform balances for physics and materials science coursework

FAQ

Is the ES Series suitable for regulatory-compliant weighing in GMP environments?
It supports GMP documentation practices (e.g., calibration records, user logs) but lacks 21 CFR Part 11-compliant electronic signatures and encrypted audit trails; validation must be performed per site-specific SOPs.
Can I connect multiple ES units to one computer?
Yes—using a USB-to-RS232 hub with individual COM port assignment, provided software supports multi-device polling.
What maintenance is required beyond routine calibration?
Annual verification of mechanical alignment and load cell zero balance; cleaning of pan surface and vent openings with isopropyl alcohol; no lubrication or internal adjustment needed.
Does the battery support hot-swapping?
No—battery replacement requires brief power-down; however, runtime monitoring and low-battery warning allow scheduled maintenance without process interruption.
Are stainless-steel pans available as an option?
Stainless-steel pans are standard on ES-KT heavy-duty models (100 kg and above); ES-HTS tabletop variants offer optional SS upgrade kits upon order.