EM3490B High Voltage Insulation Resistance Tester is also known as megohm meter, which is used for testing insulation resistance, dielectric absorption ratio, polarization index and AC/DC voltage. This tester with LCD large screen with backlight display, data hold, automatic discharge, automatic shutdown and other functions. The  tester has the functions of test timing and voltage monitoring. When the loop voltage is higher than 36v. the tester will forbid tested to protect the safety of the tested objects and personnel. The tester is easy to operate, insulation resistance value, test time, output voltage display on the same screen. The tester also have the functions of measuring AC voltage, DC voltage.
EM3490B High Voltage Insulation Resistance Tester complete appliance is beautiful, with wide range, high precision, high resolution, easy to operate, convenient to carry, accurate and reliable, stable performance, strong anti-interference ability features. And with shockproof, dust proof, moisture-proof structure, which is suitable for measuring insulation resistance of various electrical equipment and insulation materials such as motors, cables, switches, electrical appliances, etc. These are the commonly used and indispensable instruments in the telecommunications, power, meteorology, computer rooms, oil fields, mechanical and electrical installation and maintenance industries, as well as in industrial enterprises that utilize electricity as industrial power or energy.It is suitable for measuring the resistance of various insulating materials and the insulation resistance of transformers, motors, and electrical equipment.
ETCRMETER is a high-end brand of ETCR. All products are manufactured by ETCR, which also provides technical support and after-sales service. 

Product Features
1. The insulation resistance value, test time, and output voltage test data can displays on the same screen. It is convenient for test operation and historical record query.
2.Unique strong anti-interference technology, with stable testing capability in scenarios with large distributed capacitance (such as long cables) and strong electromagnetic interference environments (such as substations).
3. Complete measurement indicators: Insulation Resistance (IR), Polarization Index (PI), Dielectric Absorption Ratio (DAR), AC / DC Voltage (V).
4. It is automatic discharge function can automatically and quickly releases the charging charge of the measured object after testing, without an additional discharge circuit.
5. The test records can be directly browsed and analyzed on the large-capacity test record memory. It can automatically store 600 groups of real-time test data with test timing.
6. The test records can be uploaded to computers for data storage, statistics and analysis by USB communication and upload function.
7. The bluetooth communication function can upload the test results to mobile phones.
  

1.Measurement Range & Accuracy

2. Technical specification