ETCR3000-Digital Earth Resistance Tester
I. Introduction
The ETCR3000 digital earth resistance tester is specially designed and manufactured for on-site measurement of earth resistance. It adopts the latest digital and microprocessor technology, measures earth resistance using 3-wire or 2-wire methods, and features unique line resistance calibration function, anti-interference capability, and environmental adaptability, ensuring high precision, high stability, and reliability over years of measurement. It is widely used for earth resistance measurement in electric power, telecommunications, meteorology, oil fields, construction, lightning protection, and industrial electrical equipment.
The ETCR3000 digital earth resistance tester has a unique line resistance calibration function, which is more accurate for on-site low-value earth resistance measurement. It can avoid errors caused by changes in line resistance due to long-term use of test leads; avoid errors caused by test leads not fully inserted into the meter interface or poor contact; avoid errors caused by users replacing or extending test leads, etc.
The meter consists of the main unit, monitoring software, test leads, communication cables, etc. The main unit features a large LCD display with blue backlight and bar graph indication for clear visibility. It can store 400 sets of data, and through the monitoring software, it enables historical query and online real-time monitoring functions with dynamic display. It has maximum, minimum, and average value indication, alarm value setting and alarm indication functions, and supports historical data reading, viewing, saving, reporting, printing, and other functions.
II. Technical Specifications
| Earth resistance measurement, ground voltage measurement, low resistance measurement |
| DC 9V zinc-manganese dry battery R14S 1.5V 6 pieces; can standby continuously for 300 hours |
| Precision three-wire measurement, simple two-wire measurement |
| Earth resistance: rated current variable pole method, measurement current 3mA Max, 820Hz; ground voltage: average value rectification |
| Average value, maximum value, minimum value |
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| 4-digit large LCD display, blue screen backlight, LCD size: 128mm×75mm; display area: 124mm×67mm |
| LED flashing indication during measurement, LCD countdown display |
| Range: 0.01Ω～2000Ω; Resolution: 0.01Ω; Accuracy: ±1%rdg±3dgt |
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