CEM DT-5520 Insulation Tester

The CEM DT-5520 Insulation Tester is a robust and reliable instrument designed for precise evaluation of electrical insulation and continuity in various installations and equipment. This device is particularly valuable for electricians and technicians engaged in ensuring the operational safety and integrity of electrical systems.

Key to the CEM DT-5520’s functionality is its provision of a 1mA test current for the MegOhm range at the rated voltage. This specific feature allows for accurate measurement of insulation resistance, which is critical for diagnosing the health and longevity of electrical insulations. By delivering a consistent 1mA current, the tester ensures that high resistance values are measured accurately, helping professionals identify potential insulation breakdowns that could lead to dangerous electrical faults.

In addition to its insulation testing capabilities, the CEM DT-5520 is equipped with a powerful 200mA short current for testing continuity. This high level of current is essential for thoroughly checking the continuity of circuits and connections within electrical systems. The 200mA current strength is particularly effective for identifying any discontinuities or faults in wires and connections, which are crucial for maintaining the safety and efficiency of electrical installations.

CEM DT-5520 Insulation Tester Specifications

Specifications
Function	Range	Max Resolution	Basic accuracy
Voltage AC	750V	1V	±1.2%rdg ±10dgts
Voltage DC	1000V	1V	±0.8%rdg ±3dgts
Resistance	200Ω, 2000Ω	0.1Ω, 1Ω	±1%rdg ±2dgts
Insulation Resistance	200MΩ, 2000MΩ 20MΩ(5520 only)	100kΩ~1MΩ 10kΩ	±3.5%rdg ±5dgts ±3.5%rdg ±5dgts
Test Voltage	250V-200MΩ/500V-200MΩ/1000V-2000MΩ, (500V-20MΩ only 5520)
Continuity Test	Active Sound Level: ≤40Ω, Test current ≤200mA
Operating Temp	0ºC~40ºC (<80%R.H.)
Storage Temp	-10ºC~60ºC (<70%R.H.)
Power Source	1.5V “AA” size Battery x 6

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Brand

Cem

CEM Corporation Overview

Name: CEM DT-5520 Insulation Tester - mme-ae
Brand: Cem
SKU: 82842

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.