In-situ calibration of hot runners requires core tools such as a portable constant temperature source, a standard platinum resistance thermometer (PT100 Class A), a multi-channel data acquisition instrument, and waterproof probes. These devices work together to ensure the accuracy and safety of on-site calibration, especially in the high-temperature and high-humidity environment of Wuhan, where protective performance is paramount.
1. Core Calibration Tools List
Table Tool Name Key Parameters Main Uses
Portable Temperature Source (e.g., Fluke 710) Temperature stability ±0.1℃, covering 150–300℃ range Provides a stable reference temperature field, simulating actual working conditions
Standard Platinum Resistance (PT100 Class A) Accuracy ±0.15℃, conforms to IEC 60751 standard Used as a comparison benchmark sensor to verify the original sensor readings
Multi-channel Data Acquisition Unit Supports simultaneous recording of ≥2 channels, sampling rate ≥1Hz Real-time acquisition and comparison of original sensor values with standard values
Waterproof Encapsulated Probe Protection rating IP67 or higher, high temperature resistance 250℃ Copes with humid environments, preventing signal drift caused by moisture
Recommended Combination: Fluke 710 + Class A PT100 + NI USB-9211 acquisition module, enabling high-precision on-site comparison.
2. Auxiliary Tools and Safety Equipment
Megohmmeter: Used to measure the insulation resistance of thermocouples to ground, ensuring ≥100 MΩ and preventing leakage interference.
Thermal Grease: Improves heat conduction efficiency between the standard probe and the temperature sensor hole, reducing contact thermal resistance.
High-Temperature Gloves and Goggles: Ensure the safety of operators working near high-temperature molds.
Hot Air Gun: Used in the humid and hot environment of Wuhan to locally dry the area around the temperature sensor hole, improving insulation performance.
3. Intelligent Optional Tools
Multi-functional Process Calibrator Supporting HART Communication: Can directly read and correct compensation parameters in the temperature control box, simplifying the calibration process.
Distributed Fiber Optic Temperature Measurement System: Serves as a distributed reference standard, suitable for system-level calibration of large multi-cavity molds.
