TR-3920 Insulation Resistance Meter (9999MΩ/1000V)

TR-3920 Insulation resistance (25–1000V, max 1.8mA) using a constant voltage method. Supports contact and short-circuit error detection with fast 50ms test time.

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TR-3920 is designed to insulation resistance of components and equipment. Using the constant voltage test method, its voltage output range is 25 ~ 1000V and the maximum output current is 1.8mA. TR-3920 has contact abnormality detection and short circuit abnormality test function, the minimum test period is only 50mS.

 

Features

 Adopting switching power supply principle, max constant current output 1.8mA and voltage output range 25 ~ 1000V with step 1V.
 High test speed, minimum test cycle only 50mS.
 Unique anomaly detection function, the instrument can detect the test leads abnormality and the abnormal contact of the measured object, avoiding the open circuit misjudgment.
 Short-circuit detection function effectively detect short-circuit conditions and avoid.
 Direct application of high-voltage breakdown of defective products and to misjudgment.
 Automatic discharge, the instrument will automatic discharge after the test completed. TR-3920 adopts non-contact constant current discharge, fast, efficient and reliable.
 Various interfaces are equipped, external I/O, analog, LAN, RS232 interface.
 Double-click trigger to prevent high-voltage electronic shock accidents caused by false triggers. Users can set the double-click action to trigger the test.
 Analog output. Analog output port of the instrument output results. After each test is completed, output 0 ~ 4V analog voltage value corresponding to the test result. There are two types of voltage output, one is full range output and the other is single range output.
 Quickly charge and discharge the capacitive load.
 Stable measurement without additional shielded wire.
 Parts of the device under test contact check function to avoid misjudgment in open circuit.
 Short circuit detection before test to prevent high voltage breakdown.
 Continuous test mode, PASS termination mode, FAIL termination mode and forced termination mode.
 Various interfaces, suitable for pipeline sorting.

 TR-3920 insulation tester software interface

 

 Application

TR-3920 High-speed Resistance Tester has a wide insulation testing hybrid vehicles, electronic components, vehicle electronics, lithium batteries, materials, soft batteries and power batteries.

 

 Features functions introduction

 Cable detection function
 
 Circuit principle

Each test end is divided into 2 test lines, and a constant current source is added between the test lines. When the DUT is short-circuited at the test end, the current source outputs a low level, otherwise it outputs a high level. Use in this way to check whether the test object or test line is in good contact.

 

 Application Example
 
Broken test leads and poor contact with the test object will lead to misjudgment of the insulation test, which may cause defective products to flow into the market. In order to prevent this kind of situation, we have a standard contact check function, which can notify the disconnection or poor contact to prevent the above situation.



  Insulation testing requirements for soft-pack batteries

Insulation testing requirements for soft-pack batteries is to detect the insulation degree between the aluminum-plastic pouch and the two tabs, and the insulation degree between the two tabs. In the testing process, it is necessary to ensure that the aluminum plastic pouch is effectively pierced by the puncture needle, and the test is effective.

The traditional inspection method of soft battery requires two insulation resistance meters in four steps. One is used to test the insulation resistance between the two tabs and the other is used to test the insulation resistance between the tabs and the pouch. But now, you only need one HT9920 tester insulation tester to make it.

ComparasionTR-3920 SolutionTraditional Solution
Hardware cost1 piece of TR-3920
2 piece insulation tester
1 piece 4-pole double throw relay4 piece 4-pole double throw relay
Test procedure1. Recall setting 1 to test the insulation resistance between pouch and tabs
1.Using PLC to test whether the three sets of probes are in good contact
2. Recall setting 2 to test the insulation resistance between the two tabs.2. Short-circuit the two tabs to discharge
 3. Insulation resistance meter A detects the insulation resistance between the two tabs
4. Insulation resistance meter B detects Insulation resistance between the tabs and the aluminum plastic pouch
Test efficiencyHigh
Slow
Tester comes with contact anomaly detection, efficient and fast. After the test completed, fast constant current dischargeThe instrument has no contact anomaly detection.
After the test completed, Slow constant resistance discharge
Project implementation and maintenanceSimple
Complicated
no more than 10 wiresMore than 40 wires




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