Fluke 789 Process Meter Digital Multimeter

The Fluke 789 ProcessMeter is a versatile, handheld device that combines a loop calibrator and a digital multimeter (DMM) in one tool. It is designed to meet the demands of process professionals, providing a comprehensive solution for troubleshooting and calibrating process instruments.

Key Features:

1. Integrated Loop Calibrator and Multimeter:

   • Combines a full-featured DMM with a loop calibrator, offering a wide range of measurement and sourcing functions in a single device.

2. 24V Loop Power Supply:

   • Provides 24V loop power for powering transmitters, which eliminates the need for an additional power supply.

3. Simultaneous Display:

   • Dual display shows both mA measurement and % of scale readings simultaneously for easy reference and faster diagnostics.

4. HART Mode Setting:

   • Allows for HART digital communicator compatibility by providing a loop supply with a built-in 250-ohm resistor.

5. Enhanced Safety:

   • CAT III 1000 V and CAT IV 600 V safety ratings ensure high levels of protection for the user.

6. Variable-Step Function:

   • Provides mA output with 0-100% span check buttons, and a 25% step, coarse, and fine adjustment for more precise control.

7. Data Logging:

   • Includes data logging functions to store and recall measurements for later analysis.

8. Durable Design:

   • Rugged construction suitable for field use, with a robust case that protects the device from harsh environments.

9. Backlit Display:

   • Features a large, backlit display for easy reading in low-light conditions.

10. Auto Shutdown:

    • Automatic power-off feature to conserve battery life when the device is not in use.

Applications:

• Process Instrument Calibration:

  • Calibrating transmitters, valves, and other process instruments in various industrial settings.

• Loop Checks:

  • Performing loop checks to ensure that 4-20 mA control systems are functioning correctly.

• Troubleshooting:

  • Diagnosing issues in process control systems, including finding and fixing problems with wiring, sensors, and transmitters.

• Maintenance:

  • Routine maintenance and verification of process instruments to ensure accurate and reliable operation.

Specifications:

• DC Voltage Measurement:

  • Range: 0 to 1000 V
  • Accuracy: ±0.1% of reading + 1 count

• AC Voltage Measurement:

  • Range: 0 to 1000 V
  • Accuracy: ±0.7% of reading + 2 counts (45 Hz to 1 kHz)

• DC Current Measurement:

  • Range: 0 to 1 A
  • Accuracy: ±0.05% of reading + 2 counts

• Resistance Measurement:

  • Range: 0 to 40 MΩ
  • Accuracy: ±0.2% of reading + 1 count

• Frequency Measurement:

  • Range: 0.5 Hz to 20 kHz
  • Accuracy: ±0.05% of reading + 1 count

• Temperature Measurement:

  • Using thermocouples, range depends on thermocouple type

• Loop Current Sourcing:

  • Range: 0 to 20 mA or 4 to 20 mA
  • Accuracy: ±0.05% of span

Usage Tips:

1. Preparation:

   • Before using the Fluke 789, ensure it is properly calibrated and the batteries are in good condition.

2. Safety First:

   • Always follow standard electrical safety practices and wear appropriate personal protective equipment (PPE) when working with electrical systems.

3. HART Compatibility:

   • Utilize the HART mode setting for compatibility with HART digital communicators, which is essential for certain process control systems.

4. Regular Maintenance:

   • Perform regular checks and maintenance of the Fluke 789 to ensure it remains in good working condition.

5. Utilize Data Logging:

   • Take advantage of the data logging features to keep track of measurements and analyze trends over time.

The Fluke 789 ProcessMeter is a powerful tool for process technicians and engineers, providing comprehensive functionality for calibration, troubleshooting, and maintenance of process instruments. Its combination of features makes it an essential device for ensuring the accuracy and reliability of process control systems.