CEM DT-9979 True-RMS Digital Multimeter

The CEM DT-9979 is a True-RMS digital multimeter designed to offer precise and reliable measurements across a variety of electrical parameters.


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CEM DT-9979 True-RMS Digital Multimeter

The CEM DT-9979 is a True-RMS digital multimeter designed to offer precise and reliable measurements across a variety of electrical parameters.This multimeter is suitable for a range of applications, including troubleshooting and maintenance in electrical, HVAC, and automotive fields. It offers both hobbyists and professionals a reliable tool for their measuring and testing needs.

The DT-9979 is a professional-grade True RMS Industrial Digital Multimeter that features a 50,000 count full graphics type LCD display with a white backlight. It offers rapid A/D conversion for quick sampling times and high accuracy, as well as built-in data logging and Trend Capture capabilities. This allows for the continuous monitoring of equipment issues without the need for manual supervision.

CEM DT-9979 Key Features

  • Large 50,000 counts, Full Graphics Type LCD display with white backlight. Multiple sets of measurement information can simultaneously be displayed at the same time.
  • Voltage (DC/AC), current(DC/AC), resistor, diode, capacitance, frequency and duty cycle measurement
  • Ability to record data of signals and review Trend Capture curve, monitoring while you work on other project. It plots measurements as a single line to help detect signal anomalies over time; store up to 10,000 recorded events
  • Log multiple sessions or log data continuously for over 200 hours.
  • Real Time Clock – for automatic time stamping of saved readings
  • Expandable meter lets you stay current as new capabilities are added
  • Allow to save and name the measurements, and also recall them at any time
  • Min/Max/Average with Time Stamp to record signal fluctuations
  • Auto zeroing function
  • Soft keys, scroll buttons much more secondary functions to access in easily
  • TRMS AC voltage and current for accurate measurements on complex signals or non-linear loads.
  • Measure up to 10A (20 A for 30 seconds; 10A continuous)
  • Peak hold function with calibration mode
  • 10MHz Frequency counter and 1MHz duty cycle measurement
  • IP67 Waterproof and Auto Power Off
  • Bluetooth interface
  • Meterbox iMM & cloud service

CEM DT-9979 Specifications

FunctionMaximumMax, resolutionAccuracy
Voltage DC1000V1μV±(0.025% + 5)
Voltage AC1000V1μV±(0.3% + 20)
Current DC10A0.01μA±(0.10% + 5)
Current AC10A0.01μA±(0.6% + 5)
Temperature-50ºC to 1000ºC0.1ºC±(1.0% + 2.5ºC)
Resistance50MΩ0.01Ω±(0.05% + 5)
Capacitance10mF0.001nF±(2.0% + 5)
Frequency10MHz0.01Hz±(0.005% + 5)
Diode and ContinuityYes
PC InterfaceBluetooth
Power Supply18 hours Li-ion rechargeable battery; AC Adaptor/charger
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CEM Corporation Overview

CEM Corporation, founded in 1978, is renowned for its pioneering contributions to scientific instrumentation with a focus on microwave-based technology for laboratory and research applications. The founders—Dr. Michael J. Collins (Chemist), Ronald Goetchius (Electrical Engineer), and Bill Cruse Jr. (Mechanical Engineer)—launched the company with a novel concept for microwave drying that significantly expedited moisture and solids analysis processes from hours down to minutes, which was a groundbreaking improvement at the time.

Product Innovation and Evolution

Over the years, CEM Corporation has expanded its product offerings beyond its original microwave moisture/solids analysis systems. Their portfolio now includes systems for:
  • Acid digestion for elemental analysis
  • Compositional testing of food products
  • Peptide and chemical synthesis
The company's dedication to innovation is reflected in their development of a diverse range of instruments suited for various applications from academic research to industrial quality control.
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