It is used for testing the performance parameters of lightning protection components such as varistors (MOV), discharge tubes (GDT) and insulation resistance (Mohm).
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PRODUCT INTRODUCTION
| MEWOI4800B intelligent lightning protection component tester, alias: lightning protection component tester, SPD field tester, etc., used to measure the performance parameters of various piezoresistors (MOV) and gas discharge tubes (GDT), the instrument has a unique high voltage Short-circuit protection, over-current protection function, professional-level parameter setting function, high-voltage limit setting, boost speed setting, qualified range setting, qualified judgment screening, automatic range adjustment and other functions. It also has the functions of single test mode and continuous test mode, especially suitable for batch component testing. It also has insulation resistance, absorption ratio, polarization index test functions. The output voltage of the instrument is up to 3000V, the initial action voltage U1mA measurement range: 50-3000V, the leakage current measurement range: 0-1000uA, the DC breakdown voltage measurement range 50-3000V, good repeatability, accuracy and reliability, and excellent test stability performance and anti-jamming capability. The instrument is widely used to test the performance parameters of overvoltage protection components such as lightning arresters, lightning arresters, surge protectors, varistors, metal ceramic discharge tubes, and vacuum arresters. The tester adopts a touch color screen Chinese interface, with direct functions, one-key measurement, and simple and quick operation. The user does not need to memorize the operation method. Click "HELP" on the screen to pop up the operation method, effectively guiding the user to operate the instrument. At the same time, the instrument adopts a large-capacity rechargeable lithium battery, and has functions such as data storage, data query, qualification judgment, automatic shutdown, and USB data upload and export. The instrument has a shockproof, dustproof, and moisture-proof structure. The whole machine is beautiful, durable, and adaptable to harsh working environments. It is a necessary instrument commonly used by meteorological lightning protection, electric power, communication, electromechanical installation and maintenance, lightning protection component manufacturers, and industrial enterprise departments. |
Features
1. A new generation of intelligent lightning protection component tester, touch the Chinese interface on the color screen, click "Help" to see the operation instructions at a glance, and the one-key test function is directly accessible. 2. The tester has a stable output voltage, the output voltage is up to 3000V, which can meet the testing requirements of various components. 3. Unique professional-level parameter setting functions: boost speed setting, high-voltage limit setting, qualified range setting, qualified judgment condition setting, and on-site testing are handy. 4. It has the choice of single test mode and continuous test mode, and the continuous test mode is especially suitable for batch component testing. 5. Test data automatic storage function, can store 3000 sets of test records, USB interface data upload function. 6. Adopt rechargeable high-capacity lithium battery. |
Technical parameter
1. Range and accuracy
| Measurement function | The output voltage | Measuring range | precision | resolution | Test Conditions |
| Varistor | Initial action voltage U (1mA) | 50～3000V | ±2%rdg±3dgt | 1V | 1mA±5μA |
| Leakage current I (0.75U, 1mA) | 0～1000μA | ±2%rdg±10dgt | 0.1uA | 0.75U1mA≤±1%±1d | |
| discharge tube | DC breakdown voltage Vsdc | 50～3000V | ±2%rdg±3dgt | 1V | 100V/S±10% |
| *Insulation resistance | 500V | 0.5MΩ～2GΩ | ±5 %rdg±10dgt | 0.1M | *MEWOI-ETCR3800B only |
| 2500V | 2.5MΩ～10GΩ | ±5 %rdg±10dgt | 0.1M |
Test conditions: varistor: 1mA±5μA; 0.75U1mA≤±1%±1d, discharge tube: 100V/S±10%
2. Other parameters
| power supply | DC 7.4V 2600mAH rechargeable lithium battery |
| measurement method | DC voltage drop method |
| display mode | Touch color screen Chinese interface, LCD size: 108mm×65mm |
| Host size | 215mm×178mm×83mm |
| quality | 1200g |
| test line | Red 1.5 meters, black 1.5 meters each |
| boost speed setting | There are 5 boost levels in total |
| High pressure limit setting | Step "250V" to adjust, the highest can be set to 3000V |
| Qualified range setting | Have |
| Qualification judgment function | The buzzer prompts, one beep for qualified, three beeps for unqualified |
| Overvoltage protection function | Have |
| data storage | 1,000 sets of varistors, 1,000 sets of gas discharge tubes, 1,000 sets of insulation resistors, storage space used and remaining capacity indication. |
| data upload | USB interface, store test records and upload data to computer |
| battery voltage | Battery power indicator, reminding to replace the battery in time when the battery voltage is low |
| Automatic shut-down | Automatic shutdown after 25 minutes of no operation |
| Random accessories | 1 host; 2 test lines; 2 alligator clips; 2 test leads; 1 charger; 1 UEB communication line; 1 meter bag |
MODEL COMPARISON
| Product number | The output voltage | Discharge tube test | Insulation resistance test |
| MEWOI4800A | 0～2000V | Have | none |
| MEWOI4800B | 0～3000V | Have | 0.5MΩ～10GΩ |
