CEM DT-9989 True-RMS Digital Multimeter

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CEM DT-9989 True-RMS Digital Multimeter

The CEM DT-9989 is a True-RMS (Root Mean Square) digital multimeter designed for accurate electrical measurements. It offers various functionalities suitable for professionals, including the ability to measure voltage, current, resistance, capacitance, frequency, and temperature. The device also features a waterproof and dustproof design, making it durable and reliable in various environments.

True-RMS measurement capability means the DT-9989 can accurately measure both pure waveforms and non-linear loads, which is essential for applications in industrial or commercial environments where power distortions can occur. Additionally, this multimeter often includes a graphical LCD display that helps in analyzing data directly on the device, and it may come with connectivity options like Bluetooth for data logging and analysis via software on other devices.

CEM DT-9989 Key Features

  • Large 50,000 count 320 x 240 TFT color LCD display
  • 20MHz/50MS/s bandwidth/Real time sample rate
  • Logging function with Trend Capture for easy review of logged data
  • Bluetooth PC interface for easy data transfer & accuracy calibration
  • 100kHz bandwidth (voltage/current)
  • AC, AC+DC true-RMS measurements
  • 0.025% DCV accuracy with Fully PC Calibration
  • Saves measurements, records events and trends
  • 20 Times/sec. A/D convert fast sampling time
  • Peak capture (records transients as fast as 250μs)
  • Min/Max/Average with Time stamp (records signal fluctuations)
  • Moto winding and low ohm (50Ω) measurement range
  • Low pass filter
  • IP Rating 67 & CATIII 1000V/CATIV 600V
  • Bluetooth interface to smartphone / PC.
  • Meterbox iMM & cloud service

CEM DT-9989 Specifications

Oscilloscope Functions
Display Size3.5″ color LCD; 320 x 240 pixels
Real time sample rate50MS/s
Vertical Sensitivity50mV to 200V/div
Vertical Resolution8 bits
Trigger ModeFree Run, falling edge, rising edge
Trigger SourceInternal
Trigger CouplingAC/DC
Input impedance1MΩ/200pF
Max Input Volatage1000V(peak)
Cursor MeasurementVoltage and time/ Frequency
True RMS Multimeter Functions
Voltage DC1000V1μV±(0.025% + 5)
Voltage AC1000V1μV±(0.4% + 40)
Current DC10A0.01μA±(0.15% + 2)
Current AC10A0.01μA±(0.6% + 5)
Temperature-50ºC to 1000ºC0.1ºC±(1.0% + 2.5ºC)
Resistance50MΩ0.01Ω±(0.05% + 2)
Capacitance10mF0.001nF±(1.0% + 5)
Frequency10MHz0.01Hz±(0.005% + 1)
Diode and ContinuityYes
PC InterfaceBluetooth
Power Supply6 hours Li-ion rechargeable battery; AC daptor/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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