Fluke 1625-2地面测试仪可面谈

Fluke 1625-2地面测试仪可面谈

Fluke 1625-2地面测试仪可面谈

Fluke 1625-2地面测试仪可面谈

Fluke 1625-2地面测试仪技术规格

Fluke 1625-2地面测试仪使用场景

Fluke 1625-2地面测试仪市场评价

Fluke 1625-2地面测试仪功能特性

Fluke 1625-2 地面测试仪概述

Fluke 1625-2 特点

易于操作：每一次测试时，测试仪都会提示所需使用的地桩或钳口；大尺寸旋转开关确保即使戴着手套也能操作。

USB数据存储和传输：能够通过USB端口存储和下载数据，内部存储器可存储多达1500条记录。

Fluke 1625-2 测量功能

无桩测试（仅用钳口）

测量原理：只需使用钳口即可测量接地回路电阻。将两个钳口夹在接地棒上，每个钳口均连接至测试仪，其中一个钳口感应已知固定电压，另一个钳口测量电流，然后自动测定接地棒的电阻。这种方法完全无需使用接地桩，且在测试时无需断开接地棒，保持接地系统完整性。但此方法仅适用于受测建筑物或构筑物中有接地系统的情况，在只有一条通路接地（如许多住宅应用）时，无法提供可接受的数值，则·须使用电位降测试法。

适用场景：可以在一些之前从未考虑过的位置执行接地测试，包括建筑物内部、电缆塔或任何无法接触到土地的位置。

多种接地测量类型：是一款·面的测试仪，可以完成所有四种类型的接地测量，包括三极和四极电位降（使用地桩）、四极土壤电阻率测试（使用地桩）、选择性测试（使用地桩和1个钳口）、无桩测试（仅使用2个钳口)。

Fluke 1625-2 技术参数

测量范围：0.020Ω至300kΩ，不同的显示范围有不同的分辨率，如0.001Ω至2.999Ω分辨率为0.001Ω、3.00Ω至29.99Ω分辨率为0.01Ω等。

精度：±(读数的2% + 2位数)（在某些测量中），操作误差为±(读数的5% + 5位数)。

测量时间：固定频率时通常为8秒，使用自动频率控制时，·大30秒完成所有测量频率循环。

开路电压：20/48V交流电，短路电流250mA交流电，测量频率可手动或自动选择94、105、111和128Hz(AFC)，55Hz(R*) 。

噪声抑制：120dB(162/3、50、60和400Hz) 。

·大过载：·大Urms=250V（将不会启动测量）。

Fluke 1625-2 配套设备及套件

配套设备：如Geox探头电缆、两个夹子和导线组等，还提供外接变流器作为选件，在测量网状运行的接地系统中的单个支路时，变流器变流比为80-1200:1，可以在不分离架空地线或架线塔底部接地带的情况下测量高压输电架线塔，也可用于在不分离单个防雷导线的情况下测量防雷系统。

套件内容：例如Fluke1625-2KIT包括《用户手册》、《**须知》、QRG、Geox探头电缆、两个夹子、

Fluke 1625-2 Ground Tester Overview

1. Characteristics

Easy to operate: During each test, the tester will prompt which stake or jaw needs to be used; the large-size rotary switch ensures operation even when wearing gloves.

USB data storage and transfer: Ability to store and download data via USB port, internal memory can store up to 1500 records.

2. Measurement function

Stakeless testing (jaws only)

Measuring principle: Simply use the jaws to measure the ground loop resistance. Two jaws are clamped to the ground rod and each jaw is connected to the tester. One of the jaws senses a known fixed voltage and the other measures the current and then automatically determines the resistance of the ground rod. This method does not require the use of grounding stakes at all, and there is no need to disconnect the grounding rod during testing, maintaining the integrity of the grounding system. However, this method is only applicable if there is a grounding system in the building or structure being tested. When there is only one path to ground (such as many residential applications), it cannot provide acceptable values, and the potential drop test method must be used.

Suitable scenarios: Ground testing can be performed in locations never considered before, including inside buildings, on cable towers, or anywhere where there is no access to the ground.

Multiple Ground Measurement Types: A comprehensive tester that can complete all four types of ground measurements, including three-pole and four-pole potential drop (using ground stakes), four-pole soil resistivity testing (using ground stakes), Selective testing (using ground stakes and 1 jaw), non-stake testing (using only 2 jaws).

3. Technical parameters

Measuring range: 0.020Ω to 300kΩ. Different display ranges have different resolutions, such as 0.001Ω to 2.999Ω with a resolution of 0.001Ω, 3.00Ω to 29.99Ω with a resolution of 0.01Ω, etc.

Accuracy: ±(2% of reading + 2 digits) (in some measurements), operating error ±(5% of reading + 5 digits).

Measurement time: usually 8 seconds when using a fixed frequency, and a maximum of 30 seconds to complete all measurement frequency cycles when using automatic frequency control.

Open circuit voltage: 20/48V AC, short circuit current 250mA AC, measurement frequency can be manually or automatically selected 94, 105, 111 and 128Hz (AFC), 55Hz (R*).

Noise suppression: 120dB (162/3, 50, 60 and 400Hz).

Maximum overload: Maximum Urms=250V (measurement will not be started).

4. Supporting equipment and kits

Supporting equipment: such as Geox probe cable, two clamps and conductor sets, etc. An external current transformer is also provided as an option. When measuring a single branch in a grounding system operating in a mesh, the current transformer has a conversion ratio of 80- 1200:1, can be used to measure high-voltage transmission towers without separating overhead ground wires or ground straps at the bottom of the tower, and can also be used to measure lightning protection systems without separating individual lightning protection conductors.

Kit contents: For example, Fluke1625-2KIT includes "User Manual", "Safety Instructions", QRG, Geox probe cable, two clamps,

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