CEM DT-985 True-RMS Digital Multimeter

The CEM DT-985 is a True-RMS digital multimeter, which is designed to provide highly accurate readings for both sinusoidal and non-sinusoidal waveforms. This feature makes it particularly useful in environments where the electrical signals are complex or distorted, such as in industrial applications involving motor drives or variable frequency drives.

Like most digital multimeters from CEM, the DT-985 likely offers a range of measurement functions, including voltage, current, resistance, continuity, diode testing, and perhaps capacitance and frequency measurements. Its True-RMS capability enhances its reliability for troubleshooting electrical problems accurately.

CEM DT-985 Key Features

LCD with analog bargraph & backlight
10kHz bandwidth (voltage/current),100kHz
AC True-RMS measurements
Low pass filter (VFD)
A/D convert fast sampling time
Peak capture (records transients as fast as 500μs)
Min/Max/Average with Time stamp (records signal fluctuations)

CEM DT-985 Specifications

Function	Maximum	Max. Resolution	Basic Accuracy	985	987A	987BT	987H
Voltage DC	1000V	10mV	±(0.9% + 5)	*	*	*	*
		100mV		*	*	*	*
Voltage AC	1000V	10mV	±(1.0% + 5)	*	*	*	*
		100mV		*	*	*	*
Current DC	10A	0.01μA	±(1.5% + 5)	*	*	*	*
		0.1μA		*	*	*	*
Current AC	10A	0.01μA	±(2.5% + 5)	*	*	*	*
		0.1μA		*	*	*	*
Resistance	60MΩ	10 mΩ	±(1.2% + 5)	*	*	*	*
		100 mΩ		*	*	*	*
Temperature	760ºC/1400ºF	0.1ºC/ºF	±(2.0% + 3º)	*	*	*	*
Capacitance	10mF	0.01nF	±(2.5% + 5)	*	*	*	*
Frequency	10MHz	0.01Hz	±(1.0% + 2)	*	*	*	*
Diode and Continuity	Yes
Power Supply	1.5Vx4 “AAA” batteries

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Brand

Cem

CEM Corporation Overview

Name: CEM DT-985 True-RMS Digital Multimeter - mme-ae
Brand: Cem
SKU: 81721

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.