GuanCe GEST-121T.3 High-Temperature/Low-Temperature Insulation Resistivity Tester
| Brand | GuanCe |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Regional Category | Domestic (PRC) |
| Model | GEST-121T.3 |
| Price | USD 1,850 (FOB Beijing) |
| Resistance Range | 1×10⁴ Ω to 1×10¹⁸ Ω |
| Test Voltage | 10 V, 50 V, 100 V, 250 V, 500 V, 1000 V |
| Current Range | 2×10⁻⁴ A to 1×10⁻¹⁶ A |
| Accuracy | ±1% (≤1×10¹⁰ Ω), ±5–10% (≥1×10¹⁰ Ω) |
| Temperature Control Range | –40 °C to +250 °C (via GDW-250 environmental chamber) |
| Power Supply | 220 V AC, 50 Hz |
| Dimensions (L×W×H) | 300 mm × 300 mm × 150 mm |
| Weight | ~30 kg |
| Display | Integrated industrial touchscreen interface |
Overview
The GuanCe GEST-121T.3 High-Temperature/Low-Temperature Insulation Resistivity Tester is a fully integrated, modular measurement system engineered for precise volumetric and surface resistivity characterization of insulating materials across wide thermal and environmental conditions. It operates on the principle of direct-current (DC) voltage application with high-impedance current sensing, compliant with standardized test methods including ASTM D257, IEC 60093, and GB/T 1410. The system couples a programmable temperature-controlled chamber (GDW-250) — capable of stable operation from –40 °C to +250 °C — with an ultra-high-impedance electrometer-based measurement unit (GEST-121A), enabling controlled resistivity evaluation under defined thermal, atmospheric, or vacuum conditions. Designed for metrological rigor, the platform supports traceable calibration against NIST-traceable reference resistors and accommodates variable electrode configurations to meet specimen geometry requirements (e.g., solid slabs, rods, films, powders, pastes, and liquids). Its architecture ensures minimal thermal EMF interference, guarded input circuitry, and low-noise signal conditioning — critical for reliable sub-picoampere current detection and reproducible 1018 Ω-range measurements.
Key Features
- Modular dual-subsystem design: Independent GDW-250 environmental chamber and GEST-121A resistivity analyzer allow flexible integration with other test platforms (e.g., dielectric analyzers, conductivity meters).
- Programmable temperature control with ±0.5 °C stability over full range (–40 °C to +250 °C), supported by PID-regulated heating/cooling and real-time thermocouple feedback (Type K).
- 6-step selectable DC test voltage (10 V to 1000 V), each calibrated to ±0.2% accuracy; voltage sourcing complies with IEC 61000-4-5 surge immunity standards.
- Four-terminal (Kelvin) measurement topology with guarded electrodes to eliminate leakage path errors and parasitic capacitance effects.
- Industrial-grade 7-inch capacitive touchscreen HMI with embedded firmware for automated ramp-hold-measure sequences, data logging at user-defined intervals (100 ms to 60 s), and configurable pass/fail thresholds.
- Compliance-ready architecture: Supports audit trails, user access levels (admin/operator), and timestamped raw data export — facilitating GLP/GMP-aligned workflows per FDA 21 CFR Part 11 where local validation protocols are implemented.
Sample Compatibility & Compliance
The GEST-121T.3 accommodates diverse physical forms of insulating materials without requiring sample reconfiguration. Standard electrode sets include concentric ring (for surface resistivity), guarded two-electrode (for volume resistivity of slabs), and liquid cell fixtures. Optional accessories extend capability to powdered dielectrics (using compaction dies), thin films (<50 µm), and viscous pastes (with temperature-stabilized bath interfaces). All measurements adhere to internationally recognized procedures: ASTM D257 (Standard Test Methods for DC Resistance or Conductance of Insulating Materials), IEC 60093 (Methods of Test for Volume Resistivity and Surface Resistivity of Solid Electrical Insulating Materials), and Chinese national standard GB/T 1410. The system’s electrical safety design conforms to IEC 61010-1 (Measurement, Control and Laboratory Equipment — Safety Requirements), including double insulation, earth leakage protection, and interlocked chamber access.
Software & Data Management
The embedded control firmware provides local execution of standardized test routines — including voltage ramping, dwell stabilization, timed resistance acquisition, and automatic calculation of resistivity (ρ) and surface resistivity (σ) using geometric correction factors. Raw measurement data (voltage, current, temperature, timestamp) are stored in CSV format on internal flash memory (8 GB) and exportable via USB 2.0. No proprietary software installation is required for basic operation; however, optional PC-based analysis suite (Windows 10/11 compatible) enables advanced statistical reporting (mean, SD, CV%), trend charting across thermal cycles, and batch comparison against reference datasets. All data files contain embedded metadata: operator ID, test method ID, chamber serial number, calibration due date, and environmental condition logs — supporting ISO/IEC 17025 documentation requirements for accredited laboratories.
Applications
- Quality assurance of polymer-based insulators (e.g., polyimide films, epoxy encapsulants, silicone rubbers) across automotive, aerospace, and power transmission sectors.
- R&D evaluation of novel ceramic dielectrics (Al₂O₃, ZrO₂ composites) and nanocomposites under thermal stress cycling.
- Validation of space-grade materials per ECSS-Q-ST-70-02C for outgassing-induced surface conductivity drift at low pressure and extreme temperatures.
- Regulatory compliance testing for medical device housings (ISO 10993-1) and implantable electronics packaging.
- Academic research into ion conduction mechanisms in solid polymer electrolytes (SPEs) and battery separator films under controlled humidity and temperature gradients.
FAQ
What temperature uniformity is maintained inside the GDW-250 chamber during resistivity measurement?
The GDW-250 achieves ±0.8 °C spatial uniformity across a 100 mm × 100 mm test zone at steady state, verified by three-point thermocouple mapping per IEC 60068-3-5.
Can the system perform simultaneous temperature ramping and continuous resistivity monitoring?
Yes — the firmware supports synchronized linear or stepwise temperature profiles (0.1 °C/min to 5 °C/min) with concurrent resistance sampling at up to 10 Hz, storing time-correlated Ω–°C datasets.
Is vacuum compatibility available as a factory option?
Vacuum-rated versions (to 10−3 mbar) are available with modified chamber seals, feedthrough-rated electrodes, and optional residual gas analyzer (RGA) interface — contact technical sales for configuration details.
How is measurement traceability ensured for accreditation purposes?
Each GEST-121A module ships with a factory calibration certificate referencing NIST-traceable high-value resistors (109–1014 Ω); annual recalibration services include uncertainty budgets per ISO/IEC 17025 Annex A.
Does the system support custom electrode geometries for non-standard specimens?
Yes — mechanical drawings and dimensional specifications for user-designed electrodes are provided in the technical manual; GuanCe offers OEM electrode fabrication upon request with material certification (e.g., stainless steel 316L, gold-plated copper).
