Fluke 789

Fluke 789 – Combined Loop Calibrator & True-RMS Multimeter

Overview

The Fluke 789 ProcessMeter combines a precision digital multimeter (DMM) with a loop calibrator in one rugged handheld tool. It can measure, source, and simulate 4-20 mA loops, provide 24 V loop power, and supports true-RMS AC/DC voltage up to 1000 V. Designed for industrial instrumentation, maintenance, and process control, it is especially useful for verifying, troubleshooting, and calibrating current loop devices and transmitters. It includes features like HART mode, dual display, advanced backlight, and durable design.

Key Features

• True-RMS DMM: measures AC/DC voltage and current up to 1000 V / 1 A

• Loop calibrator: sourcing / simulating 4-20 mA signals

• Built-in 24 V loop power supply for transmitter testing

• Selectable 250 Ω resistor for HART communications mode

• Dual bright display (simultaneous mA and % scale readout)

• Frequency measurement up to 20 kHz

• Modes: Min/Max/Average, Hold, Relative, Diode test, Continuity beeper

• Auto-step / manual coarse / fine / 25% / 100% span adjustments, auto ramp

• Rugged housing with accessible battery and fuse

• Safety rating: CAT III 1000 V / CAT IV 600 V

Technical Specifications

• Model: 789

• Voltage AC (True-RMS): up to 1000 V

• Voltage DC: up to 1000 V

• Current DC (measurement): up to 1 A

• Current source/simulate: 0-20 mA or 4-20 mA

• Drive capability: up to 1200 Ω load at 20 mA; 24 V compliance in loop power mode

• Resolution: down to 0.001 mA in current measure

• Voltage DC Accuracy: ±0.1 %

• Resistance: up to 40 MΩ

• Continuity: beeper threshold <100 Ω

• Frequency: 0.5 Hz to 20 kHz; accuracy ±0.005 %

• Display: dual simultaneous readouts (mA and % scale) with bright backlight

• Size (H × W × L): approx. 50 × 100 × 203 mm

• Weight: ~610 g

• Power: 4 × AA alkaline batteries

• Battery life: ~140 hours (meter mode), ~10 hours (sourcing 20 mA)

• Operating Temperature: -20 … +55 °C

• Storage Temperature: -40 … +60 °C

• Environmental: up to 95% non-condensing humidity at 30 °C, shock tested to 1 m, vibration 2 g from 5-500 Hz

• Safety Category: CAT IV 600 V / CAT III 1000 V

Applications

• Calibrating and troubleshooting 4-20 mA instrumentation loops and transmitters

• Verifying wiring, sensors, and control loop devices without separate tools

• Field maintenance in process plants, oil & gas, power generation, and automation

• Supporting HART field devices with built-in resistor and loop power

Why Choose the Fluke 789

• Combines DMM & loop calibrator in one tool

• Built-in loop power and HART mode reduce setup time

• Rugged safety ratings for industrial environments

• Dual display and user-friendly interface

Order Now

The Fluke 789 is part of Fluke’s ProcessMeter lineup. Available for purchase. Ships worldwide.

NEW product in original sealed packaging. The product may be of older version or design. The packaging may have markings, signs of discoloration, and wear. DDPARTSSOLUTION Warranty: 1 Year. Manufacturer's Warranty and Support NEVER apply