Digital Earth Resistance Tester,ground resistance tester,GEO meter
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INTRODUCTION
MEWOI4000+ Digital Earth Resistance Tester specially designed and manufactured for the field measurement of ground resistance, adopts dgital and micro-pocessing technology 3 wire or 2 wire method to measure ground resistance,with unique calibration function for wire resistance, anti-inteference ability and environmental adaptabilty, 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 is more accurate to meaure the low value ground resistance in the field, wich can avoid the error cused 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. |
1. Range and accuracy
Measurement function | Range | precision | Resolution |
Ground resistance | 0.10Ω～20Ω | ±2%rdg±3dgt (auxiliary ground resistance 100Ω±5%, voltage to ground <10V) | 0.01Ω |
0.1Ω～200Ω | 0.1Ω | ||
1Ω～2000Ω | 1Ω | ||
ground current | 0mA～100A AC | ±2%rdg±3dgt | 1mA |
ground voltage | 0V～200V AC | ±2%rdg±3dgt | 1V |
2. Technical specifications
Function | Ground resistance measurement, ground current measurement, ground voltage measurement |
power supply | DC 9V (alkaline dry battery LR6 1.5V 6 sections) |
back light | Controllable brightness, suitable for use in dark places |
measurement method | Precise three-wire measurement, simple two-wire measurement |
Measurement methods | Grounding resistance: rated current changing pole method, measuring current 20mA Max; Ground voltage: RMS acquisition Current: RMS acquisition |
test frequency | 128Hz |
Short circuit test current | AC 20mA max |
Auxiliary pile judgment | Can avoid the error caused by the excessive grounding resistance of the auxiliary grounding electrode |
Wire Resistance Calibration | Avoid errors caused by the test line not being fully inserted into the instrument interface or poor contact, or the user replaces the extended test line, etc., making the grounding resistance measurement more accurate |
display mode | LED screen, black text on white background |
Current Clamp Size | Jaw 35mm×40mm |
LCD size | LCD display field: 58mm×46mm |
Meter size | About 160mm×100mm×66mm |
test line | 3 pieces: red 15m, yellow 10m, green 5m each |
Simple test line | Red 1.5m |
Auxiliary ground rod | 2 pieces: Φ10mm×230mm |
measure time | Current: about 2 times/second; Ground voltage: about 2 times/second; Ground resistance: about 15 seconds/time |
Measurement times | More than 5000 times (measure 10Ω in 20Ω range, measure once, stop for 30 seconds and measure again) |
line voltage | Measure voltage to ground: measure below AC 200V |
overflow display | Over-range overflow function: "OL" symbol display |
battery voltage | When the battery voltage drops to about 7.2V, the low battery voltage symbol " " flashes to remind you to replace the battery. |
Working current | Backlight: 56mA Max |
Standby: 20mA Max (backlight off) | |
Measurement: 200mA Max (backlight off) | |
quality | Meter: about 470g (including battery) |
Current clamp: about 190g | |
Total weight: about 2125g (including accessories) | |
Working temperature and humidity | -10℃～40℃; below 80%rh |
storage temperature and humidity | -20℃～60℃; below 70%rh |
overload protection | Measurement of grounding resistance: AC 280V/3 seconds between each port of EP and EC |
Insulation resistance | More than 10MΩ (500V between the circuit and the shell) |
Pressure resistance | AC 3700V/rms (between the circuit and the case) |
Electromagnetic properties | IEC61010-4-3, radio frequency electromagnetic field≤1V/m |
Suitable for safety regulations | IEC61010-1, IEC1010-2-31, IEC61557-1, pollution degree 2, CAT Ⅲ 300V |
