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INTRODUCTION
MEWOI4000+ Digital Earth Resistance Tester specially designed and manufactured for the field measurement of ground resistance, adopts digital and micro-processing technology, 3 wire or 2 wire method to measure ground resistance, with unique calibration function for wire resistance, anti-interference ability and environmental adaptability, to ensure the long-term measurement of high precision, high stability and reliability. MEWOI4000+ Digital Earth Resistance Tester has the unique function of wire resistance calibration, and it is more accurate to measure the low value ground resistance in the field, which can avoid the error caused by the change of wire resistance in the test line for a long time usage.It can avoid errors caused by incomplete insertion of test line into instrument interface or bad contact.It can avoid the error caused by the user to change or lengthen the test line. MEWOI4000+ Digital Earth Resistance Tester is composed of a host, a current clamp, a test line, etc. It can store 1000 sets of data and has functions such as historical data access, reading, saving, reporting, printing,and so on. |
SPECIFICATION
Range and Accuracy
| Test Function | Range | Accuracy | Resolution |
| Earth Resistance | 0.10Ω ~ 20Ω | ±2%rdg±3dgt (Auxiliary earth resistance 100Ω±5%,voltage to earth<10V) | 0.01Ω |
| 0.1Ω ~ 200Ω | 0.1Ω | ||
| 1Ω ~ 2000Ω | 1Ω | ||
| Earth Current | 0mA~100A AC | ±2%rdg±3dgt | 1mA |
| Earth Voltage | 0V~200V AC | ±2%rdg±3dgt | 1V |
Technical Specification
| Function | Description |
| Power Supply | DC9V, R6 AA dry batteryX6PCS |
| Earth Resistance | Range: 0.10Ω ~ 2000Ω |
| Resolution: 0.01Ω | |
| Accuracy: ±2%rdg±3dgt | |
| Grounding Current | Range: 0mA~ 100A AC |
| Resolution: 1mA | |
| Accuracy: ±2%rdg±3dgt | |
| Grounding Voltage | Range: 0~200V AC |
| Resolution: 1V | |
| Accuracy: ±2%rdg±3dgt | |
| Display LCD | LCD:58mmX46mm |
| Tester Dimension | 210mm(L)×133mm(W)×68mm(H) |
| Weight | Host: about 800g, total weight: about 2285g (include accessories) |
| Measurement Method | Earth resistance: rated current change-pole method, measure current 10mA Max; Voltage to earth: average value rectification |
| Measurement Time | Earth resistance: 15 seconds/time;Voltage to earth : 2 times/second; |
| Data Storage | 1000 groups , the little digital flash "1000" symbol indicate storage is full |
| Data Access | Data access function: display "READ" symbol |
| Overrange Display | Overrange overflow function: display ”OL” symbol |
| Auxiliary Ground Rod | 2 PCS: Φ10mm×250mm |
| Test Wires | Red 15m, yellow 10m, green 5m, red 1.5m (total 4 pcs wires) |
| Wire Resistance Verification | Avoid errors caused by the test line not fully inserted into the instrument interface or poor contact or the user replaces the lengthened test line, ensure grounding resistance measurement more accurate |
| Auto Shutdown | 3 Minutes after power on, will automatic shutdown without any operation. |
| Battery Voltage | While battery voltage decreases to around 7.2V, will display low battery voltage symbol“ ”, and remind to replace the battery. |
| Overload Protection | Earth resistance: between each interfaces of E-P,E-C, AC 280V/3 seconds |
| Electromagnetic Property | IEC61010-4-3, wireless frequency electromagnetic field≤1V/m |
| Working Current | Backlight: 25mA Max; Standby: 85mA Max(Backlight close); Measurement: 300mA Max(Backlight close) |
| Accessories | Tester:1PCS; Current sensor: 1PCS; Grounding rod: 2PCS; Test line :3PCS; Simple test line: 1PCS; Tester bag:1PC; |
