Yoke YP6002 Precision Electronic Balance
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | YP6002 |
| Maximum Capacity | 600 g |
| Readability | 0.01 g (10 mg) |
| Accuracy Class | Class II (per OIML R76) |
| Calibration | Manual internal/external calibration |
| Weighing Units | g, oz, ct, lb, pcs, % |
| Connectivity | RS-232 interface (optional printer/PC connection) |
| Construction | Die-cast metal base with reinforced chassis |
| Compliance | CE, ISO 9001, GLP-compliant data logging capability |
Overview
The Yoke YP6002 Precision Electronic Balance is a Class II analytical-grade weighing instrument engineered for routine laboratory, quality control, and educational applications requiring reliable mass measurement at 10 mg readability. Based on electromagnetic force compensation (EMFC) transduction technology, the YP6002 delivers stable, drift-resistant performance under standard ambient conditions (20 ± 5 °C, < 80 % RH non-condensing). Its 600 g maximum capacity and 0.01 g resolution meet the minimum requirements for pharmacopeial general chapter (USP), ISO 17025-compliant balance verification, and ASTM E898-22 procedures for precision mass determination in non-regulated environments. The device operates without internal motorized calibration mechanisms—calibration is performed manually using certified external weights traceable to NIST or BIPM standards—ensuring full transparency and audit readiness in GLP and GMP-adjacent workflows.
Key Features
- Robust die-cast aluminum base and rigid mechanical architecture minimize vibration transmission and improve settling time (< 2.5 s typical stabilization).
- High-contrast 18 mm LCD display with backlight enables clear reading under varied lighting conditions, including controlled-lab and production-floor settings.
- Multi-function operation modes: standard weighing, piece counting (PCS), percentage weighing (%), and unit conversion (g, oz, ct, lb, dwt).
- RS-232 serial interface supports direct output to thermal printers (e.g., Epson TM-U220) or ASCII-compatible data acquisition software for raw weight export.
- Auto-zero tracking and overload protection (up to 150 % of max capacity) ensure long-term sensor integrity and operational safety.
- GLP-compliant printout format includes date/time stamp, operator ID field (manual entry), balance ID, and calibration status indicator.
Sample Compatibility & Compliance
The YP6002 accommodates standard laboratory sample containers—including weighing boats, crucibles, and volumetric flasks—within its 130 mm diameter pan aperture. It is compatible with static samples up to 600 g and does not support dynamic or continuous-flow weighing. While not certified for hazardous area use (ATEX/IECEx), it complies with IEC 61010-1:2010 for electrical safety and EMC Directive 2014/30/EU. For regulatory environments, users must perform periodic verification per ISO/IEC 17025:2017 Clause 6.4.7 and document calibration intervals using traceable reference masses. The balance satisfies minimum performance criteria outlined in USP for repeatability (≤ 0.02 g standard deviation at 50 % load) and eccentricity (±0.02 g variation across pan quadrants).
Software & Data Management
No proprietary software is bundled; however, the RS-232 interface outputs ASCII-formatted weight strings (e.g., “+000.423 g”) at user-selectable baud rates (9600 or 19200 bps). Third-party tools—including LabArchives ELN, Agilent OpenLab CDS, and custom Python/Node.js serial listeners—can ingest real-time measurements for automated reporting. All printed records include mandatory metadata fields required for audit trails: timestamp, balance serial number, calibration due date, and manual operator annotation. No electronic signature or 21 CFR Part 11 compliance is natively supported; such functionality must be implemented at the host system level.
Applications
- Raw material receipt inspection in food, chemical, and pharmaceutical manufacturing facilities.
- Preparation of standard solutions and buffer formulations in QC laboratories (e.g., pH calibration standards, titrant stock solutions).
- Teaching fundamental metrology concepts—including uncertainty propagation, repeatability assessment, and calibration hierarchy—in undergraduate chemistry and physics labs.
- Inventory management via piece-counting mode for uniform components (e.g., tablets, capsules, screws) with known average piece weight.
- Batch release testing where mass-based acceptance criteria are defined (e.g., tablet weight variation per USP ).
FAQ
What is the recommended calibration frequency for the YP6002 in a regulated environment?
Calibration should occur before first use, after relocation, following any impact event, and at least once per shift in high-throughput QC settings—per ISO/IEC 17025:2017 and internal SOPs.
Does the YP6002 support automatic internal calibration?
No. It requires manual external calibration using certified weights; no motorized calibrator or temperature-compensated internal mass is integrated.
Can the balance be connected to LIMS or ERP systems?
Yes—via RS-232 to middleware gateways (e.g., LabVantage, Thermo Fisher SampleManager) that parse ASCII weight streams into structured database fields.
Is the YP6002 suitable for weighing hygroscopic or volatile samples?
Only when used inside a draft shield or glove box; the open pan design lacks environmental isolation features such as draft shields or active humidity control.
What documentation is provided for traceability?
Factory calibration certificate (non-accredited), CE Declaration of Conformity, and user manual with verification test protocols and tolerance tables per OIML R76 Annex C.
