Yoke YP1002 Precision Electronic Balance
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | YP1002 |
| Instrument Type | Analytical-Grade Laboratory Balance |
| Maximum Capacity | 100 g |
| Readability | 10 mg |
| Repeatability | ≤ ±10 mg |
| Dimensions (W×D×H) | 320 × 280 × 150 mm |
| Pan Diameter | Ø130 mm |
| Power Supply | AC/DC dual-mode |
Overview
The Yoke YP1002 Precision Electronic Balance is a high-reliability, entry-level analytical balance engineered for routine mass measurement in educational laboratories, quality control environments, and small-scale R&D settings. Based on electromagnetic force compensation (EMFC) transduction technology, the YP1002 delivers stable, drift-resistant weighing performance under variable ambient conditions—including minor air currents, temperature fluctuations, and low-frequency mechanical vibrations. Its 100 g maximum capacity and 10 mg readability meet the requirements of ISO/IEC 17025-compliant weighing tasks where precision at the centigram level is sufficient—such as sample preparation for titration, reagent dispensing, or gross weight verification prior to high-resolution analysis. The instrument’s robust metal base and optimized mechanical damping structure minimize settling time and improve resistance to external perturbations, ensuring consistent response across repeated measurements.
Key Features
- Electromagnetic force compensation (EMFC) sensor architecture for high linearity and long-term stability
- Integrated metal chassis with reinforced base geometry to suppress vibration-induced noise and enhance static equilibrium
- Fast stabilization time (< 2 seconds typical) enabled by adaptive digital filtering and real-time zero-tracking algorithm
- Multi-unit conversion capability: g, oz, ct, dwt, grain, tl (troy), and lb — configurable via front-panel keypad
- Counting mode with automatic average piece weight calculation for uniform-part inventory management
- Animal (dynamic) weighing mode with active drift compensation for live-sample applications
- RS232C serial interface compliant with standard ASCII protocol for bidirectional data exchange with LIMS or Excel-based logging systems
- AC/DC dual-power operation with internal rechargeable battery support (optional configuration)
Sample Compatibility & Compliance
The YP1002 accommodates standard laboratory samples up to 100 g in mass and within a Ø130 mm pan diameter. Its open pan design permits easy placement of beakers, weighing boats, crucibles, and Petri dishes. The balance operates within an ambient temperature range of 10–30 °C and relative humidity ≤ 80 % RH (non-condensing), aligning with general-purpose lab environmental specifications. While not certified for GMP-regulated production weighing, the YP1002 supports GLP documentation workflows through its RS232C output, enabling traceable data capture when integrated with compliant software platforms. It conforms to basic electromagnetic compatibility (EMC) requirements per IEC 61326-1 and safety standards per IEC 61010-1 for laboratory electrical equipment.
Software & Data Management
Data export is facilitated via RS232C using standard NMEA-style framing (9600 baud, 8N1), allowing direct integration with third-party laboratory informatics systems. No proprietary driver installation is required; terminal emulation (e.g., PuTTY, Tera Term) or custom Python/Excel VBA scripts can parse output strings containing timestamped weight values, unit identifiers, and status flags (e.g., “STABLE”, “OVERLOAD”). Audit trail functionality is dependent on host-side logging implementation. For regulated environments requiring 21 CFR Part 11 compliance, users must deploy validated middleware that enforces electronic signature, user authentication, and immutable record retention—functions not embedded in the balance firmware itself.
Applications
- Student laboratory instruction in chemistry and biology curricula
- Preparation of calibration standards and reference materials
- Weighing of powders, granules, and solid reagents for formulation trials
- Inventory counting of hardware components, pharmaceutical tablets, or electronic parts
- Field-deployable mass verification in mobile testing units or maintenance workshops
- Baseline weighing prior to high-precision analysis on microbalances (e.g., Mettler Toledo XP2U or Sartorius Cubis®)
FAQ
What is the recommended calibration frequency for the YP1002?
Calibration should be performed before first use, after relocation, following significant ambient temperature shifts (>5 °C), and at least once per shift in high-throughput environments. External calibration with Class M2 or better weights is advised.
Does the YP1002 support internal calibration?
No—the YP1002 requires external calibration weights. Internal motorized calibration is not implemented in this model series.
Can the balance operate on battery power alone?
Standard configurations include AC adapter support only; DC-only operation requires optional battery module installation—not supplied as default.
Is the RS232C interface compatible with modern Windows/macOS systems?
Yes—when used with a USB-to-serial adapter (FTDI chipset recommended), the interface functions reliably with contemporary OS versions and standard terminal applications.
What does “repeatability ≤ ±10 mg” mean in practice?
Under identical environmental conditions and using the same test weight, ten consecutive weighings will yield results varying no more than ±10 mg from their mean value—a metric reflecting short-term instrumental consistency, not absolute accuracy.
