An insulation resistance tester is an instrument used to measure the insulation resistance of electrical insulation materials, equipment, or circuits. It is mainly used to detect the integrity of the insulation system, evaluate the insulation performance, and identify potential insulation faults.
The working principle of the insulation resistance tester is based on Ohm's law. By applying a DC voltage to the insulation system under test and measuring the leakage current passing through the insulation system, the insulation resistance value can be calculated. The insulation resistance value is usually expressed in megaohms (MΩ).

2.FEATURE

SMR635/SMR635A is an intelligent measurement instrument with high performance ARM micro processor control design. It is ideal for different ranges of various electrical, electronic parts, and electronic equipment testing.
One-in-four professional instrument that integrates insulation resistance meter, picometer, digital potentiometer and digital high voltage source meter 6 measurement ranges 0.001V~1000V arbitrary voltage output under 1V resolution meets any test voltage requirements and can test resistance ranges 500Ω~9.9PΩ, with max display of 99999 digits.
Equipped with test electrode can test the volume resistivity and surface resistivity of the material
SMR635 can accurately draw curve V-I/V-R curve
Equipped with discharging function
Supper-high speed testing provides the best solution for automated production. SMR635 has a sorting and beeper function
Equipped with Handler and RS232 interfaces fit for the automatic sorting system to complete the automatic pipeline test.
Calibration function, open-circuit clearing at full measurement ranges.
4.3-inch TFT true color LCD display

3. Product Parameters

Model	SMR635	SMR635A
Display	4.3-inch large screen LCD display
Test Parameters	Insulation resistance (IR),leakage current (I),volume resistivity (Rv),area resistance(Rs)
Readback Voltage Accuracy	0.5%±1V
Output Voltage	Programmed:1~1000 V,Step value:1mV	Programmed:1~1500 V,Step value:1V
Measurement Range	Resistance:12-9.9P2;Leakage current:2mA~10fA
Ranges	6 different measurement ranges,auto and manual modes are available in each range
Basic Accuracy	1%(10M~1G);3%(1G~10G);5%(10G~100G);10%(100G~1T);20%(≥1T)
Calibration	Open-circuit reset for all ranges
Test Speed	1 meas/sec.,5meas/sec.
Timing Charger	0~999.9S
Comparator	1 set data records,judging over the upperlimit(HI),qualified (IN),and less than the lower limit(LO)
Trigger mode	Internal trigger,manual trigger,external trigger,bus trigger
Interface	RS-232,Handler(PLC)
Power supply	Voltage:198VAC~240VAC,Frequency:47Hz-63Hz,Max power:50VA
Size and Weight	331mm329mm80mm(LWD),gross weiht:2.5kg
Accessories	9330 cable,PB36 connector,9800 cable,Power cord,USB
Options	0305 test electrode

4.IN ALL

The insulation resistance tester is widely used in the fields of power, electrical, electronics, industry, aerospace, etc. It is used to test the insulation performance of motors, transformers, cables, switchgear, electrical equipment, etc. It is an important tool to ensure the safe operation of electrical equipment and preventive maintenance. When using an insulation resistance tester, it is necessary to follow the correct operating methods and safety precautions to ensure the accuracy of the test and personal safety.

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