Sunny Hengping MP Series Precision Electronic Balance

Overview

The Sunny Hengping MP Series Precision Electronic Balance is an entry-to-mid-tier analytical weighing platform engineered for reliability, repeatability, and operational flexibility in routine laboratory, quality control, and educational settings. Utilizing electromagnetic force compensation (EMFC) transduction technology, the MP series delivers stable and drift-resistant measurements across its defined capacity range. Unlike strain-gauge-based platforms, EMFC ensures linear response and minimal hysteresis—critical for applications requiring consistent mass determination under variable environmental conditions. Designed for daily use in non-regulated or semi-regulated workflows, the MP balance supports basic Good Laboratory Practice (GLP) documentation through traceable RS232 data export and user-configurable zero-tracking behavior. Its compact footprint and low power consumption—enabled by a rechargeable lithium polymer battery—make it suitable for mobile lab carts, field deployment, or benchtop installations where AC mains access is intermittent.

Key Features

• Nine-level adjustable weighing speed: Optimizes response time for dynamic samples (e.g., hygroscopic or volatile substances) without compromising stability.
• Backlit LCD display with contrast control: Ensures legibility under varied ambient lighting, including low-light cleanroom or fume hood environments.
• Adjustable automatic zero-tracking function: Compensates for minor air currents or thermal drift while maintaining baseline integrity—configurable to disable for static calibration protocols.
• Dual-mode power architecture: Operates continuously via AC adapter or up to 12 hours on a single charge of the integrated high-energy lithium polymer battery (IEC 62133 certified).
• Full-range tare capability: Allows subtraction of container mass at any point within the full weighing span—essential for sequential multi-sample preparation.
• Four-stage mechanical damping system: Mitigates vibration transmission from adjacent equipment or footfall, enhancing measurement reproducibility on shared lab benches.
• Integrated overload protection: Combines mechanical stop limits with real-time load monitoring firmware to prevent sensor damage beyond 150% of rated capacity.
• RS232 serial interface (standard): Enables direct connection to PCs, printers, or LIMS systems for automated data capture—supports ASCII protocol with configurable baud rate (9600–115200 bps).
• Multilingual unit conversion: Supports 10 common mass units (g, oz, ct, dwt, grain, tl, momme, tael, tola, lb) with programmable default selection per user profile.

Sample Compatibility & Compliance

The MP Series accommodates standard laboratory vessels—including glass beakers, aluminum weighing boats, and stainless-steel crucibles—on its 130 mm diameter stainless-steel pan. Its open-top design permits easy placement of irregular or tall containers, though users must ensure center-of-gravity alignment to minimize eccentric loading error. While not certified to OIML R76 or NIST Handbook 44 for legal-for-trade applications, the MP balance meets internal QC requirements aligned with ISO/IEC 17025 Clause 6.4 (equipment suitability) when paired with external Class F1 or E2 test weights and documented calibration intervals. It is routinely deployed in pre-GMP environments for raw material receipt inspection, formulation batching, and educational titration labs. Environmental operation is validated between 5–40 °C and ≤85% RH (non-condensing), with warm-up stabilization time ≤30 minutes at 23 ±2 °C ambient.

Software & Data Management

Data output follows standard ASCII formatting via RS232, enabling seamless integration with third-party software such as LabWare LIMS, Thermo Fisher SampleManager, or custom Python/Excel automation scripts. Each transmitted record includes timestamp (if host-provided), net weight, unit code, and status flag (e.g., “STABLE”, “OVERLOAD”, “UNSTABLE”). No proprietary driver or cloud service is required. For audit readiness, laboratories may implement manual calibration logs per ISO 17025 Annex A.3, recording date, technician ID, reference standard ID, deviation values, and pass/fail determination against ±0.02 g linearity tolerance (per MP2002/MP3002 specifications). Firmware updates are performed offline via USB-to-serial adapter and manufacturer-provided utility (Windows only).

Applications

• Routine sample weighing in chemistry and biology teaching labs
• Raw material verification in food, cosmetic, and pharmaceutical ingredient handling
• Preparation of standard solutions and buffer stocks (e.g., 0.1 M NaCl, pH 7.4 phosphate buffer)
• Weighing of filter papers and crucibles in gravimetric moisture analysis (ASTM D2231, ISO 787-2)
• Quality assurance checks for tablet/capsule mass variation (USP <905> preliminary screening)
• Calibration verification of pipettes and volumetric flasks using water density correction (ISO 8655-6)
• Field-based soil or sediment sampling where portability and battery autonomy are essential

FAQ

Is the MP Series compliant with FDA 21 CFR Part 11?
No—the MP Series does not include electronic signature, audit trail, or role-based access control features required for Part 11 compliance. It may be used in Part 11 environments only as a data source feeding into a validated LIMS or ELN system that manages authentication and traceability.
What calibration standards are recommended for external calibration?
Class F1 stainless-steel weights (for capacities ≤500 g) or Class E2 weights (for ≥600 g models) traceable to NIST, PTB, or NIM, with uncertainty ≤1/3 of the balance’s readability (i.e., ≤0.003 g for 0.01 g models).
Can the balance be used in a fume hood?
Yes—provided airflow velocity at the pan surface remains below 0.5 m/s and the unit is leveled post-installation. Avoid placing directly in the hood’s exhaust path.
Does the battery support hot-swapping?
No—the rechargeable lithium polymer battery is internal and non-user-replaceable. Battery replacement requires authorized service center intervention.
Is auto-calibration available?
No—MP models require external calibration using certified weights. Internal calibration (IntCal) is not implemented in this series.