Yokogawa CA450 Process Multimeter

The Yokogawa CA450 Process Multimeter is a professional-grade handheld instrument designed for loop checking, transmitter simulation, and precision signal measurement in industrial process environments. Developed by Yokogawa, the CA450 combines the functionality of a loop calibrator and a digital multimeter into one compact, rugged tool.

It supports simultaneous 24 V loop power and mA measurement, making it ideal for commissioning, maintenance, and troubleshooting of control loops in DCS, PLC, and field instrumentation systems.

Features and Performance

• Loop Check & Transmitter Simulation
  Supports SIMULATE (SINK) mode to emulate transmitters and verify loop integrity.

• 24 V Loop Power with mA Measurement
  Power the loop while measuring current simultaneously, simplifying field testing.

• 4–20 mA Output Functions
  Span, step, auto-step, and sweep output for fast and accurate loop testing.

• HART Mode Support (250 Ω Resistor)
  Built-in resistance setting for HART-compatible loop checks (without full HART communication).

• High-Accuracy Signal Measurement
  DC mA accuracy up to 0.05%, measuring signals up to 30.000 mA with confidence.

• Handheld DMM Capabilities
  Measures voltage, resistance, and frequency, reducing the need for multiple tools.

• Peak / Hold Function
  Ideal for detecting DCS power fluctuations and peak-to-peak measurements.

• Safety-Oriented Design
  Current terminal shutter minimizes incorrect connections and reduces electric shock risk.

Why You Should Buy It

• Combines process loop testing and DMM functions in one device

• Ideal for 4–20 mA loop commissioning and maintenance

• High measurement accuracy trusted in industrial environments

• Supports HART loop testing requirements via resistor mode

• Compact, lightweight, and field-ready design

• Backed by 36-month Yokogawa warranty

FAQ – Yokogawa CA450

Q: Does the Yokogawa CA450 support 4–20 mA loop testing?
A: Yes. It supports loop check functions, mA measurement, and 4–20 mA simulation modes.

Q: Can it power a loop while measuring current?
A: Yes. The CA450 provides 24 V loop power while measuring mA simultaneously.

Q: Is this a HART communicator?
A: No. It does not communicate digitally with HART devices, but it supports HART loop mode using a 250 Ω resistor.

Q: Is the CA450 intrinsically safe?
A: No. This model is not rated as intrinsically safe.