Yokogawa CA71 Multifunction Calibrator

Product Overview

The Yokogawa CA71 Multifunction Calibrator is a portable high-precision calibration instrument designed for testing, calibration, and maintenance of industrial measurement devices. It can generate and measure voltage, current, resistance, thermocouple (TC), RTD, frequency, and pulse signals, making it suitable for instrumentation engineers and field maintenance technicians.

The CA71 is widely used for calibrating temperature transmitters, pressure transmitters, flow transmitters, process controllers, sensors, and industrial instrumentation systems.

Main Specifications

• Manufacturer: Yokogawa
• Model: CA71
• Product Type:
  • Multifunction Calibrator
  • Portable Process Calibrator
  • Signal Generator & Measurement Instrument
• Measurement Functions:
  • DC Voltage
  • DC Current
  • Resistance
  • Thermocouple (TC)
  • RTD
  • Frequency
  • Pulse signals
• Display:
  • LCD display with backlight
• Power Supply:
  • 4 × AA alkaline batteries
  • Optional AC adapter

Technical Specifications

Signal Generation (Source)

Voltage Output

• Range:
  • 0 to 30 V DC

Current Output

• Range:
  • 0 to 24 mA DC

Resistance Output

• Supports resistance simulation for instrumentation calibration

Frequency Output

• Range:
  • 1 Hz to 11 kHz

Pulse Output

• Programmable pulse signal generation

Measurement Functions

Voltage Measurement

• Maximum input:
  • Up to 100 V DC

Current Measurement

• Maximum input:
  • Up to 100 mA DC

Resistance Measurement

• High accuracy resistance measurement

Temperature Measurement

Supports:

• Thermocouple (TC)
• RTD sensors

Built-in reference junction compensation sensor improves thermocouple measurement accuracy.

Functional Features

The Yokogawa CA71 provides:

• Source and measurement simultaneously
• 4–20 mA transmitter simulation
• 24 V DC transmitter power supply
• Auto-step output function
• Sweep output function
• Memory storage function
• RS-232 communication interface (optional)

Memory capacity:

• Up to 50 sets of generated/measured data

Mechanical Specifications

Features & Advantages

• Original Yokogawa precision test instrument
• Compact handheld design for field use
• Combines multiple calibration functions in one device
• Supports industrial process signal simulation
• Improves efficiency during instrument commissioning
• Suitable for transmitter testing and troubleshooting
• High reliability for industrial environments

Applications

Used in:

• Process automation systems
• Oil & gas facilities
• Chemical plants
• Power generation
• Pharmaceutical industries
• Factory instrumentation maintenance

Typical applications:

• Calibration of pressure transmitters
• Temperature instrument testing
• Flow meter verification
• PLC analog input testing
• Control loop troubleshooting