Digital Earth Resistance Tester,ground resistance tester,GEO meter
| Contact Us For Quotation | Email: mewoi@mewoi.com | Whatsapp&Wechat:+8618620373879 |
INTRODUCTION
MEWOI4000A+ digital ground resistance tester is specially designed and manufactured for on-site measurement of ground resistance and ground voltage. It uses digital and micro-processing technology to measure ground resistance with precise 3-wire method or 2-wire method. The instrument has the function of judging the grounding resistance of the auxiliary grounding pile. The instrument can display the resistance value of the auxiliary grounding pile during the test, which can avoid the error caused by the excessive grounding resistance of the auxiliary grounding pole. It has the function of wire resistance calibration, which can avoid the error caused by the test line not being fully inserted into the instrument interface or poor contact, and the error caused by the user's replacement or lengthening of the test line. It makes the field low-value grounding resistance measurement more accurate and reliable. MEWOI4000A+ digital ground resistance tester is composed of host, current clamp, test line and so on. It has the function of automatic shutdown, full-scale automatic shifting of the instrument, strong anti-interference ability, and easier operation. It is widely used in the grounding resistance measurement of electric power, telecommunications, meteorology, oil field, construction, lightning protection and industrial electrical equipment, etc. |
1. Range and accuracy
Measurement function | Range | precision | Resolution |
Earth 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 | ||
Earth voltage | 0V～200V AC | ±2%rdg±3dgt | 1V |
(Note: 23℃±5℃, below 75%rh)
2. Technical specifications
Function | Earth resistance measurement, earth 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 |
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 157mm×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 |
Measuring time | 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) |
Total weight: about 1935g (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 |
