Wuhan GDZX Power Equipment Co., Ltd
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20mA Strong Anti-Interference Ability Digital Grounding Resistance Tester
Product introduction
The ZXET3005 Digital Grounding Resistance Tester is designed and manufactured according to the new lightning protection grounding resistance detection standard. The short-circuit test current reaches 20mA. The precision 3-wire method or simple 2-wire method measures the grounding resistance. The FFT (fast Fourier transform) technology is introduced, AFC (Automatic Frequency Control) technology has unique anti-interference ability and environmental adaptability, and the consistency of repeated testing is strong. It is widely used in the measurement of grounding resistance and grounding voltage in electric power, telecommunications, meteorology, oil fields, construction, lightning protection, and industrial electrical equipment.
Features
1. Two and three-wire method for testing grounding resistance, loop resistance, and on-resistance;
2. Equipotential connection resistance, ground voltage, AC voltage test;
3. Designed according to the new standard of meteorological lightning protection grounding resistance test;
4. The grounding resistance test current reaches 20mA;
5. Toolbox design, pressure resistance 200kg;
6. FFT, AFC technology, strong anti-interference ability;
7. Range: 0.000Ω～3000Ω;
8. Resolution: 0.001Ω.
| Functions | Ground resistance, ground voltage, low value resistance measurement |
| Power supply | DC 7.4V 1.8Ah rechargeable lithium battery, fully charged and continuous use for about 8 hours |
| Back light | Controllable white screen backlight, suitable for use in dark places |
| Measurement | Precision three-wire method and simple two-wire method for measuring grounding resistance |
| Measurement methods | Two-three-wire method measurement: rated current changing pole method |
| Voltage to ground: average rectification (between P-E interface) | |
| Range | Grounding resistance: 0.000Ω ～ 3000Ω Ground voltage: AC 0.0 ～ 100V (50Hz / 60Hz) |
| Resolution | 0.001Ω; 0.1V |
| Accuracy | Ground resistance: ± 2% Rdg ± 0.05Ω (0 ~ 30Ω) ±2%Rdg±5dgt(30~3000Ω) Note: 1. The auxiliary grounding resistance is 100Ω ± 5%, and the ground voltage is＜5V 2. Additional error when the interference voltage is 5V≤ ± 5% Rdg ± 5dgt Ground voltage: ± 2% Rdg ± 3dgt (50Hz / 60Hz) |
| Test voltage waveform | Sine wave |
| Test frequency | 128Hz/111Hz/105Hz/94Hz(Automatic frequency selection) |
| Short circuit test current | AC 20mA Max |
| Open circuit test voltage | AC 40V Max |
| Display mode | 6-digit large LCD display |
| Measurement instructions | LED flashing indication during measurement, LCD countdown display |
| LCD size | 128mm×75mm |
| LCD Display | 124mm×67mm |
| Product size | Host size: about 320mm × 270mm × 145mm |
| Outer packaging size: 400mm × 245mm × 335mm | |
| Test line | 3 bars: red 15m, yellow 10m, green 5m |
| Simple test line | 2 bars: red 1.6m, one black 1.6m |
| Auxiliary ground rod | 2 roots:Φ10mm×150mm |
| Measure time | Ground voltage: about 2 times / second; ground resistance: about 7 seconds / time |
| Measurement times | More than 5000 times (short circuit test, test once, stop for 30 seconds and then test) |
| Line voltage | AC measurement below 100V |
| Communication interface | With RS232 interface, the stored data can be uploaded to the computer through the data software, saved and printed |
| Communication line | One RS232 communication line, 1.5m long |
| Data retention | "HOLD" symbol indicates when holding data |
| Data storage | 2000 groups, "MEM" storage instruction, the storage is full, display "FULL" symbol |
| Data access | "READ" symbol indicates when checking data |
| Overflow display | "OL" symbol indication when over-range overflow |
| Interference test | Automatically identify the interference signal, and display "NOISE" when the interference voltage is higher than 5V |
| Alarm function | When the measured value exceeds the alarm setting value, "beep--beep--beep--" alarm prompt |
| Battery voltage | When the battery voltage drop is insufficient, the battery voltage low symbol is displayed to remind the need for charging. |
| Automatic shut-down | Automatic shutdown after 15 minutes |
| Power consumption | Backlight: 25mA Max (separate backlight power consumption) |
| Standby: 25mA Max (the backlight turns off after turning on) | |
| Measurement: 150mA Max (backlight off) | |
| Weight | Instrument: 2.645kg (including battery) |
| Total weight: 5.95kg (including packaging) | |
| Tool box | Toolbox design, can bear 200kg |
| Working temperature and humidity | -10 ℃ ～ 40 ℃; below 80% Rh |
| Storage temperature and humidity | -20 ℃ ～ 60 ℃; below 70% Rh |
| Overload protection | Measuring ground resistance: AC-280V / 3 seconds between C-E and P-E ports |
| Insulation resistance | 20MΩ or more (500V between circuit and case) |
| Withstand | AC 3700V / Rms (between instrument panel and cabinet) |
| Electromagnetic characteristics | IEC61326(EMC) |
| Suitable for safety regulations | IEC61010-1 (CAT Ⅲ 300V, CAT IV 150V, pollution degree 2); IEC61010-031; IEC61557-1 (ground resistance); JJG366-2004 (Ground resistance meter) |
Product pictures