HHM-EX540-Multimeter-Series

Supported Applications

The Omega HHM-EX500 Series comprises heavy-duty industrial multimeters designed for rugged environments. These True RMS instruments measure DC/AC voltage, DC/AC current, resistance, capacitance, frequency (electrical and electronic), duty cycle, diode test, continuity, and thermocouple temperature. The series is rated CAT IV-600V Safety Rating for Industrial Applications.

Operating Conditions & Performance

The HHM-EX500 Series features an IP67 enclosure rating and a drop-proof design to 2.9 m (6'). All models provide 1000 V Input Protection on All Functions, with surge protection rated at 8kV peak per IEC 61010. The series operates on a 9V battery (included) and includes an auto power off feature with disable capability.

Performance specifications vary by model:

• HHM-EX505: Basic accuracy of 0.5% with a 4000 count display.
• HHM-EX520: Basic accuracy of 0.09% with a 6000 count display.
• HHM-EX530: Basic accuracy of 0.06% with a 40,000 count display.

All models feature a large backlit LCD and True RMS averaging capabilities.

Configuration Options

The series offers configurable measurement ranges across three primary model families. The HHM-EX530 provides the highest resolution for voltage (down to 0.01 mV) and current (down to 0.01 µA), while the HHM-EX520 supports DC/AC Current up to 20A, compared to 10A on the HHM-EX505.

Key configurable capabilities include:

• Voltage Ranges: DC/AC Voltage from 0.1 mV or 0.01 mV up to 1000 Vdc/Vac depending on the model.
• Current Ranges: DC/AC Current from 0.1 µA or 0.01 µA up to 20A (HHM-EX520, HHM-EX530) or 10A (HHM-EX505).
• Resistance: Ranges from 0.1Ω or 0.01Ω up to 60M Ω.
• Capacitance: Ranges from 0.001 nF to 40 mF (HHM-EX530).
• Frequency: Electrical frequency ranges include 5 Hz to 1 kHz, while electronic frequency extends up to 100 MHz on the HHM-EX530.
• Temperature: Measurement range of -20 to 750°C (-4 to 1382°F) for HHM-EX505; -45 to 750°C (-50 to 1382°F) for HHM-EX520 and HHM-EX530.

Standard accessories include a free Type K insulated beaded wire thermocouple (Model No. SC-GG-K-30-36), double molded test leads, magnetic hanging strap, carrying case, 9V battery, and operator's manual. Optional NIST-traceable calibration is available.

Key Product Differences

The series consists of three distinct models differentiated by display resolution, accuracy class, and specific measurement range limits:

• HHM-EX505: A 4000 count True RMS industrial multimeter with 0.5% basic accuracy.
• HHM-EX520: A 6000 count True RMS industrial multimeter with 0.09% basic accuracy and extended current range to 20A.
• HHM-EX530: A 40,000 count True RMS industrial multimeter offering the highest resolution (0.06% basic accuracy) and expanded frequency/capacitance ranges.

All models share identical physical dimensions of 184 x 83 x 57 mm (7.25 x 3.25 x 2.25") and a weight of 349 g (12.3 oz). The series holds CE, UL LISTED, RoHS certifications.