PIE 422PLUS Thermocouple & Milliamp Calibrator

Overview

The PIE 422PLUS Diagnostic Thermocouple & Milliamp Calibrator is a portable dual-function instrument that combines thermocouple calibration with 4-20 mA loop measurement and simulation capabilities. It supports 14 thermocouple types and can simultaneously source voltage signals and measure current outputs, making it ideal for commissioning, maintenance, and troubleshooting of temperature and current-based instrumentation.

Key Features

• 14 thermocouple types: J, K, T, E, R, S, B, N, G, C, D, L (J-DIN), U (T-DIN), P (Platinel II)
• Temperature calibration with adjustable EZ-DIAL for precise 0.1° steps
• 0-24 mA source and measure capability
• Two-wire transmitter simulation with simultaneous sensor input and 24V power supply
• Built-in 250 ohm HART resistor for HART transmitter support
• Automatic loop diagnostic technology for ground fault and current leakage detection
• Cold junction accuracy of ±0.05°C, traceable to NIST
• Stable reference voltage and low-drift components for laboratory-grade accuracy
• Backlit display for operation in low-light conditions
• Automatic output stepping in 2, 3, 5, 11, or 21 steps with configurable step timing
• Rugged rubber boot and low-profile switches for field durability

Applications

• Calibration and verification of thermocouple instruments and sensors
• Testing and calibration of 4-20 mA current loop instruments
• Commissioning of temperature and pressure transmitters
• Field troubleshooting of control loops and measurement systems
• Heat treating process verification per AMS 2750 standards
• Quality control and system accuracy testing

Included Accessories

• Blue rubber boot
• Four AA alkaline batteries
• Certificate of calibration
• Deluxe hands-free carrying case (Part No. 020-0211)
• Evolution mA/V wire kit (Part No. 020-0207)
• Red and black leads with banana plugs and alligator clips