True RMS Multimeter

The 394B Process Multimeter combines the capabilities of a mA loop calibrator with a full-featured True RMS multimeter in one package.

Dedicated mA loop calibrator functions provide technicians and electricians with the tools required for testing and troubleshooting current loop applications in process control systems. Source and simulate industry standard 0-20 mA and 4-20 mA control loops using the adjustable DC current output. To evaluate process transmitters, the built-in power supply outputs 24 V while measuring the signal drive current displayed in mA and % of scale.

Additionally, the 394B serves as a general purpose multimeter delivering the performance required for evaluating a wide range of electronics and electrical systems.

When working in low-light environments, the auto on/off backlight adjusts for best visibility while maximizing battery life. Dual line display capabilities enable two measurements or one measurement and a math function to appear on screen simultaneously. PC software is provided for convenient measurement monitoring and recording from a computer connected to the meter’s optical isolated USB interface.

Key Features:

Process

• Source/Measure/Simulate 0-20 mA and 4-20 mA DC current

• Simultaneously monitor mA and % of scale

• Adjustable manual and automatic output current ramp and step modes

• Built-in 24 V loop power supply for testing process transmitters eliminates the need for an external supply

• HART mode inserts 250 Ohms resistor in series with loop power output when evaluating devices using the HART communication protocol

General Purpose

• Measurement functions: DCV, ACV, AC+DC, DCI, ACI, resistance, frequency, continuity, diode test

• True RMS AC and AC+DC measurements

• 50,000-count, dual display

• dB, dBm, limits, peak-hold, REL, MIN, MAX, average math functions

• HFR (High Frequency Rejection) mode applies a low pass filter for AC measurements (800 Hz cut-off)

• Frequency measurement to 100 kHz

• Dirt and water-resistant housing with rubberized protective case

• Isolated USB interface with operating software for remote data logging

• CAT III 1000 V / CAT IV 600 V protection

Provided application software

PC software is available for logging measurement data at specified intervals with date and time stamp. Log up to 100,000 data points in graph or table format.

Measurement data recorded in the field can be imported using the software for analysis.