The Metravi PM-39 Process Meter is a high-precision instrument designed for measuring, sourcing, and simulating process signals, particularly current (mA) and voltage (mV/V) signals, which are commonly used in industrial automation and control systems. It is an essential tool for technicians and engineers who need to verify and calibrate instrumentation like transmitters, controllers, sensors, and indicators used in various industrial processes. The PM-39 is well-suited for on-site calibration, field service, and maintenance activities due to its compact and robust design.

Key Specifications:

• Model: PM-39
• Brand: Metravi
• Measurement Type: Process Meter (Current and Voltage Measurement and Sourcing)
• Display: High-resolution digital LCD with backlight for clear and easy reading of measurements and outputs.

Measurement and Sourcing Capabilities:

• Current Measurement:
  • Range: 0 to 24 mA
  • Resolution: 0.001 mA, providing precise measurement of current signals.
  • Accuracy: Typically ±0.02% of reading 1 digit, ensuring reliable and accurate current measurements.
• Current Sourcing/Simulation:
  • Range: 0 to 24 mA
  • Resolution: 0.001 mA, allowing fine adjustments for accurate calibration.
  • Accuracy: Typically ±0.02% of reading 1 digit, ensuring accurate simulation of current loops for testing and calibration.
• Voltage Measurement:
  • Range: 0 to 100 mV and 0 to 10V
  • Resolution: 0.01 mV (for low voltage) and 0.001V (for higher voltage ranges), ensuring detailed voltage measurements.
  • Accuracy: Typically ±0.02% of reading 1 digit, providing accurate verification of voltage signals in process control.
• Voltage Sourcing/Simulation:
  • Range: 0 to 100 mV and 0 to 10V
  • Resolution: 0.01 mV and 0.001V, providing precise voltage outputs for calibration purposes.
• Loop Power Supply:
  • Output: 24V DC, enabling the PM-39 to power 2-wire transmitters directly during testing or calibration.

Features:

• Multifunction Capability:
  • Measures and Sources mA and Voltage Signals: Can both measure and simulate current (mA) and voltage (mV/V) signals, making it versatile for a wide range of process control applications.
  • 4-20 mA Loop Testing: Perfect for verifying the accuracy of 4-20 mA loops, commonly used in industrial process control systems.
• Digital Display:
  • Backlit LCD Screen: Large display ensures easy visibility of readings and settings in both bright and dimly lit environments.
  • User-Friendly Interface: Simple navigation buttons make it easy to switch between measurement and sourcing modes.
• Data Hold Function:
  • Freeze Readings: Allows users to hold the current reading on the display for easier recording and analysis.
• Max/Min Recording:
  • Captures Extremes: Records and displays the maximum and minimum values during a measurement session, providing insight into signal variations.
• Step and Ramp Functions:
  • Step Mode: Allows users to generate step changes in current or voltage, useful for testing the response of process instruments.
  • Ramp Mode: Smoothly varies the output over a range, helping to verify the response and accuracy of devices under changing conditions.

Power Source:

• Battery Operated: Uses standard rechargeable batteries, making it portable and ideal for field use.
• Battery Type: Typically powered by 1 x 9V battery or a rechargeable Li-ion battery.
• Low Battery Indicator: Alerts users when battery power is low, ensuring the device is always ready for use.

Safety and Compliance:

• Durable Construction: Designed for industrial environments, with a robust housing that protects against rough handling and environmental factors.
• Safety Rating: Suitable for use in industrial settings with enhanced protection against electrical noise and interference.
• Certifications: Compliant with industry standards for calibration instruments, ensuring reliable and accurate performance.

Physical and Design:

• Compact and Lightweight: Ergonomically designed for ease of use and portability, making it suitable for both field and lab applications.
• Color: Typically available in a professional-grade finish, such as black or blue.
• Warranty: One year against manufacturing defects, offering assurance of product quality and reliability.

Applications:

The Metravi PM-39 Process Meter is ideal for a variety of applications, including:

• Process Control Calibration: Calibrates and verifies the performance of 4-20 mA current loops, transmitters, sensors, and controllers used in industrial automation.
• Field Calibration and Maintenance: Its portability makes it perfect for on-site testing and calibration of process control instruments.
• Troubleshooting: Diagnoses issues in control systems by measuring and simulating process signals, allowing for efficient identification of faults in current loops and voltage outputs.
• Quality Control: Ensures that process instruments are accurate and operate within specified ranges, helping maintain consistency in industrial processes.
• Research and Development: Provides precise measurements and simulations for testing new process control systems and prototypes.

The Metravi PM-39 is a versatile and accurate process meter, designed to meet the needs of professionals in industrial automation, maintenance, and process control. With its capability to measure, simulate, and power process signals, it is an essential tool for ensuring the accuracy and reliability of instrumentation across a wide range of applications. Its compact and rugged design ensures that it performs reliably in both field and laboratory settings, making it a valuable asset for technicians and engineers alike.