CEM DT-987BT True-RMS Digital Multimeter

The CEM DT-987BT is a True-RMS Digital Multimeter, which, like other True-RMS meters, provides accurate readings for AC measurements even when the waveform is non-sinusoidal. This feature is particularly valuable in industrial and electronic applications where power distortions can occur.

This model likely includes Bluetooth connectivity, which is indicated by the “BT” in the model number. This allows the multimeter to connect to a smartphone or computer, enabling remote monitoring and data logging, which is beneficial for capturing readings in hard-to-reach places or for maintaining historical data for analysis.

CEM DT-987BT Key Features

Bluetooth interface for easy data transfer & accuracy calibration
Large 60,000/6000 count LCD display with analog bargraph & backlight
10kHz bandwidth (voltage/current)
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)
4-20mA process loop measurements with % reading

CEM DT-987BT Specifications

Specifications
Function	Maximum	Max, resolution	Basic Accuracy	985	987A	987BT	987H
Voltage DC	1000V	10mV	±(0.9% + 5)		*	*	*
Voltage DC	1000V	100mV	±(0.9% + 5)	*	*	*	*
Voltage AC	1000V	10mV	±(1.0% + 5)		*	*	*
Voltage AC	1000V	100mV	±(1.0% + 5)	*	*	*	*
Current DC	10A	0.01μA	±(1.5% + 5)		*	*	*
Current DC	10A	0.1μA	±(1.5% + 5)	*	*	*	*
Current AC	10A	0.01μA	±(2.5% + 5)		*	*	*
Current AC	10A	0.1μA	±(2.5% + 5)	*	*	*	*
Resistance	60MΩ	10 mΩ	±(1.2% + 5)		*	*	*
Resistance	60MΩ	100 mΩ	±(1.2% + 5)	*	*	*	*
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, 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.